![\"menu-r.4af5f7ec.gif\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250616234548-6850acac3f841.gif\")
<\/p>\n \u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 <\/p>\n
\u7b80\u4ecb：OPC DA (Data Access)\u662fOPC\u89c4\u8303\u7684\u4e00\u90e8\u5206，\u7528\u4e8e\u5b9e\u65f6\u6570\u636e\u8bbf\u95ee，\u4f7f\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u95f4\u7684\u6570\u636e\u4ea4\u6362\u53d8\u5f97\u7b80\u5355\u3002C#\u7248\u672c\u7684OPC DA\u6e90\u7801\u901a\u5e38\u5b9e\u73b0\u4e3a\u5ba2\u6237\u7aef\u6216\u670d\u52a1\u5668，\u4fbf\u4e8e\u5f00\u53d1\u4e0e\u81ea\u52a8\u5316\u8bbe\u5907\u901a\u4fe1\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u672c\u9879\u76ee\u6df1\u5165\u63a2\u8ba8\u4e86C#\u5b9e\u73b0OPC DA\u7684\u5173\u952e\u6280\u672f\u8981\u70b9，\u5305\u62ecOPC Foundation Libraries\u7684\u4f7f\u7528\u3001COM Interop\u6280\u672f\u3001OPC Group\u548cItems\u7684\u64cd\u4f5c\u3001\u8fde\u63a5\u4e0e\u65ad\u5f00\u670d\u52a1\u5668\u3001\u6570\u636e\u8ba2\u9605\u4e0e\u4e8b\u4ef6\u5904\u7406\u3001\u5f02\u5e38\u5904\u7406\u3001\u591a\u7ebf\u7a0b\u7f16\u7a0b\u3001OPC UA\u7684\u57fa\u672c\u6982\u5ff5\u548c\u67b6\u6784\u3001\u8c03\u8bd5\u4e0e\u6d4b\u8bd5\u4ee5\u53ca\u8bbe\u8ba1\u6a21\u5f0f\u548c\u6700\u4f73\u5b9e\u8df5\u7684\u5e94\u7528\u3002\u901a\u8fc7\u672c\u9879\u76ee\u7684\u5b66\u4e60\u548c\u5b9e\u8df5，\u5f00\u53d1\u8005\u5c06\u80fd\u591f\u638c\u63e1\u6784\u5efa\u9ad8\u6548\u81ea\u52a8\u5316\u7cfb\u7edf\u4ea4\u4e92\u5e94\u7528\u7a0b\u5e8f\u7684\u5173\u952e\u6280\u80fd\u3002 <\/p>\n
\u968f\u7740\u5de5\u4e1a\u81ea\u52a8\u5316\u9886\u57df\u7684\u53d1\u5c55，\u8bbe\u5907\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\u53d8\u5f97\u8d8a\u6765\u8d8a\u91cd\u8981\u3002OPC (OLE for Process Control) \u6280\u672f\u5e94\u8fd0\u800c\u751f，\u5b83\u662f\u4e00\u79cd\u8de8\u5e73\u53f0\u3001\u72ec\u7acb\u4e8e\u8bbe\u5907\u548c\u5236\u9020\u5546\u7684\u5de5\u4e1a\u901a\u4fe1\u534f\u8bae\u3002\u65e8\u5728\u4e3a\u4e0d\u540c\u5382\u5546\u7684\u63a7\u5236\u7cfb\u7edf\u63d0\u4f9b\u7edf\u4e00\u7684\u6570\u636e\u8bbf\u95ee\u63a5\u53e3\u3002OPC\u901a\u8fc7\u5c06\u5de5\u4e1a\u786c\u4ef6\u62bd\u8c61\u4e3a\u6807\u51c6\u7684COM\u63a5\u53e3，\u4f7f\u5f97\u5e94\u7528\u7a0b\u5e8f\u80fd\u591f\u9ad8\u6548\u5730\u4ece\u73b0\u573a\u8bbe\u5907\u4e2d\u8bfb\u53d6\u6570\u636e，\u540c\u65f6\u907f\u514d\u4e86\u9488\u5bf9\u7279\u5b9a\u786c\u4ef6\u8fdb\u884c\u4ee3\u7801\u7f16\u5199\u7684\u95ee\u9898\u3002 <\/p>\n
OPC DA (Data Access) \u662fOPC\u89c4\u8303\u4e2d\u6700\u6838\u5fc3\u7684\u90e8\u5206\u4e4b\u4e00\u3002\u5b83\u5b9a\u4e49\u4e86\u4e00\u7cfb\u5217\u6807\u51c6\u63a5\u53e3，\u4f7f\u5f97\u5ba2\u6237\u7aef\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e9b\u63a5\u53e3\u8bbf\u95ee\u670d\u52a1\u5668\u7aef\u7684\u6570\u636e\u3002OPC DA\u57fa\u4e8eCOM\/DCOM\u6280\u672f，\u5b83\u5305\u62ec\u5ba2\u6237\u7aef（Client）\u548c\u670d\u52a1\u5668\u7aef（Server）\u4e24\u4e2a\u4e3b\u8981\u7ec4\u4ef6\u3002\u5ba2\u6237\u7aef\u8d1f\u8d23\u53d1\u8d77\u8bf7\u6c42，\u800c\u670d\u52a1\u5668\u7aef\u5219\u54cd\u5e94\u8fd9\u4e9b\u8bf7\u6c42\u5e76\u63d0\u4f9b\u6570\u636e\u3002\u6570\u636e\u4ee5\u9879(Item)\u7684\u5f62\u5f0f\u7ec4\u7ec7，\u6bcf\u4e2a\u9879\u5bf9\u5e94\u4e8e\u670d\u52a1\u5668\u4e0a\u7684\u4e00\u4e2a\u6570\u636e\u70b9，\u5982\u6e29\u5ea6\u3001\u538b\u529b\u7b49\u5b9e\u65f6\u6570\u636e\u3002 <\/p>\n
C#\u4f5c\u4e3a.NET\u5e73\u53f0\u7684\u4e3b\u8981\u5f00\u53d1\u8bed\u8a00，\u4e0eCOM\u6280\u672f\u6709\u7740\u5929\u7136\u7684\u96c6\u6210\u80fd\u529b\u3002C#\u901a\u8fc7COM Interop\u6280\u672f\u80fd\u591f\u8f7b\u677e\u8c03\u7528COM\u7ec4\u4ef6，\u8fd9\u610f\u5473\u7740C#\u5f00\u53d1\u8005\u53ef\u4ee5\u65e0\u7f1d\u5730\u5229\u7528OPC DA\u6280\u672f\u3002OPC\u670d\u52a1\u5668\u4f5c\u4e3aCOM\u5bf9\u8c61\u66b4\u9732\u7ed9C#，\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528C#\u7684\u8bed\u6cd5\u548c\u5de5\u5177\u5bf9OPC DA\u670d\u52a1\u5668\u8fdb\u884c\u64cd\u4f5c\u3002 <\/p>\n
\u5728\u5f00\u59cb\u7f16\u5199C#\u4e0eOPC DA\u96c6\u6210\u7684\u7a0b\u5e8f\u4e4b\u524d，\u9700\u8981\u5728\u5f00\u53d1\u73af\u5883\u4e2d\u505a\u4e00\u4e9b\u57fa\u672c\u7684\u914d\u7f6e\u3002\u9996\u5148，\u786e\u4fdd\u5b89\u88c5\u4e86\u652f\u6301.NET\u7684\u5f00\u53d1\u5de5\u5177，\u5982Visual Studio\u3002\u968f\u540e，\u5b89\u88c5\u5e76\u914d\u7f6eOPC Foundation\u63d0\u4f9b\u7684OPC DA\u5e93，\u5e76\u5728\u9879\u76ee\u4e2d\u6dfb\u52a0\u5bf9COM\u7ec4\u4ef6\u7684\u5f15\u7528\u3002\u901a\u8fc7\u8fd9\u4e9b\u914d\u7f6e，\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528C#\u521b\u5efa\u5e76\u8fd0\u884cOPC DA\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u3002 <\/p>\n
OPC Foundation\u5e93\u662fOPC DA\u6807\u51c6\u5b9e\u73b0\u7684\u57fa\u7840，\u5b83\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u8bbf\u95ee\u548c\u63a7\u5236OPC\u670d\u52a1\u5668\u7684\u80fd\u529b\u3002\u8be5\u5e93\u7684\u4e3b\u8981\u529f\u80fd\u53ef\u4ee5\u6982\u62ec\u5982\u4e0b： <\/p>\n
\u83b7\u53d6\u548c\u96c6\u6210OPC Foundation\u5e93\u662f\u4f7f\u7528OPC\u6280\u672f\u7684\u524d\u63d0\u3002\u4ee5\u4e0b\u6b65\u9aa4\u8be6\u7ec6\u8bf4\u660e\u4e86\u5982\u4f55\u5b8c\u6210\u8fd9\u4e00\u8fc7\u7a0b： <\/p>\n
\u8981\u5f00\u59cb\u7f16\u5199OPC DA\u5ba2\u6237\u7aef，\u9996\u5148\u9700\u8981\u5728Visual Studio\u4e2d\u521b\u5efa\u4e00\u4e2aC#\u9879\u76ee，\u5e76\u6dfb\u52a0\u5bf9OPC Foundation\u5e93\u7684\u5f15\u7528\u3002\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b： <\/p>\n
\u8fde\u63a5\u5e76\u521d\u59cb\u5316OPC\u670d\u52a1\u5668\u662f\u521b\u5efa\u5ba2\u6237\u7aef\u7684\u5173\u952e\u6b65\u9aa4\u3002\u4ee5\u4e0b\u662f\u4e00\u6bb5\u793a\u4f8b\u4ee3\u7801，\u6f14\u793a\u4e86\u5982\u4f55\u5efa\u7acb\u8fde\u63a5： <\/p>\n
\/\/ OPC\u670d\u52a1\u5668\u8fde\u63a5\u793a\u4f8b\u4ee3\u7801
\nusing Opc.Da;
\n\/\/ …
\n\/\/ \u521d\u59cb\u5316COM\u5e93
\nComLibrary.Initialize();<\/p>\n
\/\/ \u521b\u5efa\u670d\u52a1\u5668\u5bf9\u8c61
\nServer server = new Server(new URL("opc.da:\/\/localhost\/YourOPCServerName"));<\/p>\n
\/\/ \u8fde\u63a5\u5230\u670d\u52a1\u5668
\nserver.Connect();<\/p>\n
\/\/ \u8fde\u63a5\u6210\u529f\u540e\u53ef\u8fdb\u884c\u540e\u7eed\u64cd\u4f5c，\u5982\u8bfb\u5199\u6570\u636e\u9879\u7b49<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d，\u9996\u5148\u901a\u8fc7 ComLibrary.Initialize() \u5bf9COM\u5e93\u8fdb\u884c\u521d\u59cb\u5316\u3002\u7136\u540e，\u521b\u5efa\u4e86 Server \u7c7b\u7684\u5b9e\u4f8b，\u5e76\u901a\u8fc7\u5176\u6784\u9020\u51fd\u6570\u6307\u5b9a\u4e86\u8981\u8fde\u63a5\u7684\u670d\u52a1\u5668\u3002 server.Connect() \u65b9\u6cd5\u7528\u4e8e\u5efa\u7acb\u4e0e\u670d\u52a1\u5668\u7684\u8fde\u63a5\u3002 <\/p>\n
OPC\u63a5\u53e3\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u64cd\u4f5c\u65b9\u6cd5，\u5305\u62ec\u8bfb\u53d6\u548c\u5199\u5165\u6570\u636e\u9879\u3001\u8ba2\u9605\u6570\u636e\u66f4\u65b0\u7b49\u3002\u4e0b\u9762\u662f\u5bf9\u4e00\u4e9b\u5e38\u7528\u63a5\u53e3\u65b9\u6cd5\u7684\u4ecb\u7ecd： <\/p>\n
\/\/ \u8bfb\u53d6\u6570\u636e\u9879
\nItemValueResult[] readResult = server.Read(ItemIds);<\/p>\n
\/\/ \u5199\u5165\u6570\u636e\u9879
\nvar writeResult = server.Write(ItemIds, values);<\/p>\n
\/\/ \u8ba2\u9605\u6570\u636e\u66f4\u65b0
\nSubscription subscription = server.SubscribeItems(
\n subscriptionState, ItemIds, out ItemValues);<\/p>\n
\u6bcf\u4e2a\u65b9\u6cd5\u90fd\u6709\u5177\u4f53\u7684\u53c2\u6570\u548c\u8fd4\u56de\u7c7b\u578b，\u4f8b\u5982 ItemIds \u662f\u6570\u636e\u9879ID\u7684\u6570\u7ec4， values \u662f\u9700\u8981\u5199\u5165\u7684\u503c\u6570\u7ec4\u7b49\u3002 <\/p>\n
OPC Foundation\u5e93\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9762\u5411\u5bf9\u8c61\u7684\u6a21\u578b，\u7528\u4e8e\u8868\u793aOPC\u670d\u52a1\u5668\u3001\u7ec4\u548c\u9879\u3002\u8fd9\u4e9b\u5bf9\u8c61\u5305\u62ec： <\/p>\n
\u4f7f\u7528\u5bf9\u8c61\u6a21\u578b\u65f6，\u5f00\u53d1\u8005\u901a\u5e38\u4f1a\u521b\u5efa\u4e00\u4e2a\u6216\u591a\u4e2a\u7ec4，\u5e76\u5728\u8fd9\u4e9b\u7ec4\u4e2d\u6dfb\u52a0\u9879\u3002\u901a\u8fc7\u64cd\u4f5c\u8fd9\u4e9b\u5bf9\u8c61，\u53ef\u4ee5\u6709\u6548\u5730\u7ec4\u7ec7\u548c\u7ba1\u7406\u4e0e\u670d\u52a1\u5668\u7684\u6570\u636e\u4ea4\u4e92\u3002 <\/p>\n
\u7406\u89e3\u8fd9\u4e9b\u5bf9\u8c61\u53ca\u5176\u76f8\u4e92\u5173\u7cfb\u5bf9\u4e8e\u6709\u6548\u5730\u4f7f\u7528OPC\u5e93\u81f3\u5173\u91cd\u8981\u3002\u5728\u4ee3\u7801\u4e2d，\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u7ba1\u7406\u901a\u5e38\u9075\u5faa\u4e00\u5b9a\u7684\u903b\u8f91\u987a\u5e8f，\u4f8b\u5982： <\/p>\n
\/\/ \u521b\u5efa\u7ec4
\nGroup group = server.AddGroup("MyGroup");<\/p>\n
\/\/ \u521b\u5efa\u9879\u5e76\u6dfb\u52a0\u5230\u7ec4\u4e2d
\nItem item = group.AddItem("ItemID");<\/p>\n
\/\/ \u4ece\u7ec4\u4e2d\u83b7\u53d6\u6570\u636e\u9879
\nItemValueResult itemValue = group.ReadItem(item);<\/p>\n
\u5728\u8fd9\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u4e2d，\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2a\u7ec4，\u5e76\u5411\u8be5\u7ec4\u6dfb\u52a0\u4e86\u4e00\u4e2a\u9879\u3002\u4e4b\u540e，\u901a\u8fc7\u7ec4\u7684\u5b9e\u4f8b\u8bfb\u53d6\u9879\u7684\u6570\u636e\u3002 <\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u7ae0\u8282\u5185\u5bb9\u7684\u4ecb\u7ecd，\u6211\u4eec\u5df2\u7ecf\u5f00\u59cb\u7406\u89e3OPC Foundation\u5e93\u7684\u91cd\u8981\u4f5c\u7528\u4ee5\u53ca\u5982\u4f55\u5728C#\u73af\u5883\u4e2d\u4f7f\u7528\u8be5\u5e93\u3002\u63a5\u4e0b\u6765，\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8COM Interop\u6280\u672f\u5728OPC\u5e94\u7528\u4e2d\u7684\u5b9e\u9645\u5e94\u7528，\u4ee5\u53ca\u5982\u4f55\u901a\u8fc7C#\u4f7f\u7528COM\u7ec4\u4ef6\u6765\u8fdb\u4e00\u6b65\u63d0\u5347OPC\u5f00\u53d1\u7684\u7075\u6d3b\u6027\u548c\u529f\u80fd\u6027\u3002 <\/p>\n
COM（Component Object Model，\u7ec4\u4ef6\u5bf9\u8c61\u6a21\u578b）\u4e0e.NET\u4e92\u64cd\u4f5c\u7684\u57fa\u7840\u662fCOM\u4e92\u64cd\u4f5c\u5c42，\u8be5\u5c42\u63d0\u4f9b\u4e86\u4e00\u79cd\u673a\u5236\u5141\u8bb8.NET\u5e94\u7528\u7a0b\u5e8f\u4e0eCOM\u7ec4\u4ef6\u8fdb\u884c\u4ea4\u4e92\u3002\u4e92\u64cd\u4f5c\u4e3b\u8981\u6d89\u53ca\u6570\u636e\u7c7b\u578b\u7684\u8f6c\u6362\u3001\u63a5\u53e3\u7684\u5c01\u88c5\u4ee5\u53ca\u4e8b\u4ef6\u5904\u7406\u7b49\u3002\u5728.NET\u6846\u67b6\u4e2d，\u4e92\u64cd\u4f5c\u662f\u901a\u8fc7\u8fd0\u884c\u5e93\u53ef\u8c03\u7528\u5305\u88c5（Runtime Callable Wrapper，RCW）\u5b9e\u73b0\u7684，\u5b83\u8d1f\u8d23\u5904\u7406COM\u5bf9\u8c61\u548c\u6258\u7ba1\u4ee3\u7801\u4e4b\u95f4\u7684\u6240\u6709\u4ea4\u4e92\u3002 <\/p>\n
\u5f53\u4e00\u4e2a\u6258\u7ba1\u4ee3\u7801\u5c1d\u8bd5\u8fde\u63a5\u5230COM\u5bf9\u8c61\u65f6，.NET\u8fd0\u884c\u65f6\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2aRCW\u3002RCW\u5c01\u88c5\u4e86COM\u5bf9\u8c61\u7684\u63a5\u53e3，\u4f7f\u5f97.NET\u4ee3\u7801\u53ef\u4ee5\u50cf\u4f7f\u7528\u5176\u4ed6.NET\u5bf9\u8c61\u4e00\u6837\u8c03\u7528COM\u5bf9\u8c61\u7684\u65b9\u6cd5\u3001\u5c5e\u6027\u7b49\u3002\u540c\u65f6，RCW\u8d1f\u8d23\u5f15\u7528\u8ba1\u6570，\u786e\u4fddCOM\u5bf9\u8c61\u5728\u4e0d\u518d\u4f7f\u7528\u65f6\u80fd\u591f\u88ab\u6b63\u786e\u5730\u91ca\u653e\u3002 <\/p>\n
\u5b9e\u73b0COM\u4e0e.NET\u4e92\u64cd\u4f5c，\u901a\u5e38\u9700\u8981\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4： <\/p>\n
\u6ce8\u518cCOM\u7ec4\u4ef6 ：\u786e\u4fddCOM\u7ec4\u4ef6\u5df2\u7ecf\u5728\u7cfb\u7edf\u4e0a\u6ce8\u518c，\u6216\u8005\u5728.NET\u9879\u76ee\u4e2d\u76f4\u63a5\u6dfb\u52a0COM\u7ec4\u4ef6\u7684\u5f15\u7528\u3002 <\/p>\n<\/li>\n
\u6dfb\u52a0COM\u5f15\u7528 ：\u5728Visual Studio\u4e2d，\u901a\u8fc7\u201c\u6dfb\u52a0\u5f15\u7528\u201d\u5bf9\u8bdd\u6846，\u9009\u62e9\u201cCOM\u201d\u6807\u7b7e\u9875，\u5e76\u9009\u62e9\u6240\u9700\u7684COM\u7ec4\u4ef6\u3002 <\/p>\n<\/li>\n
\u5f15\u7528\u8f6c\u6362 ：\u6dfb\u52a0\u5f15\u7528\u4e4b\u540e，.NET\u8fd0\u884c\u65f6\u4f1a\u81ea\u52a8\u521b\u5efaRCW，\u6b64\u65f6\u53ef\u4ee5\u5728C#\u9879\u76ee\u4e2d\u50cf\u4f7f\u7528.NET\u7c7b\u578b\u4e00\u6837\u4f7f\u7528COM\u7ec4\u4ef6\u3002 <\/p>\n<\/li>\n
\u5904\u7406\u8de8\u8bed\u8a00\u5f02\u5e38 ：\u7531\u4e8eCOM\u548c.NET\u4e4b\u95f4\u5b58\u5728\u5dee\u5f02，\u9700\u8981\u7279\u522b\u6ce8\u610f\u5f02\u5e38\u5904\u7406\u673a\u5236\u7684\u5dee\u5f02，\u7279\u522b\u662f\u5173\u4e8e\u5f02\u5e38\u7684\u7c7b\u578b\u548c\u5904\u7406\u65b9\u5f0f\u3002 <\/p>\n<\/li>\n
\u4e8b\u4ef6\u548c\u56de\u8c03 ：\u5982\u679cCOM\u7ec4\u4ef6\u66b4\u9732\u4e86\u4e8b\u4ef6\u63a5\u53e3，\u9700\u8981\u5728.NET\u4ee3\u7801\u4e2d\u5b9e\u73b0\u4e8b\u4ef6\u5904\u7406\u903b\u8f91，\u5e76\u8fdb\u884c\u9002\u5f53\u7684\u5c01\u9001\u5904\u7406，\u4ee5\u786e\u4fdd\u4e8b\u4ef6\u80fd\u591f\u5728\u6258\u7ba1\u4ee3\u7801\u4e2d\u6b63\u786e\u89e6\u53d1\u3002 <\/p>\n<\/li>\n
\/\/ \u793a\u4f8b：\u5728C#\u4e2d\u5f15\u7528\u4e00\u4e2aExcel COM\u5bf9\u8c61<\/p>\n
\/\/ \u6dfb\u52a0COM\u5f15\u7528：\u5728Visual Studio\u4e2d，\u9009\u62e9 "Add Reference -> COM -> Microsoft Excel Object Library"<\/p>\n
\/\/ \u5bfc\u5165\u547d\u540d\u7a7a\u95f4
\nusing Excel = Microsoft.Office.Interop.Excel;<\/p>\n
namespace ComInteropExample
\n{
\n class Program
\n {
\n static void Main(string[] args)
\n {
\n \/\/ \u521b\u5efaExcel\u5e94\u7528\u7a0b\u5e8f\u5b9e\u4f8b
\n Excel.Application excelApp = new Excel.Application();<\/p>\n
\/\/ \u4f7fExcel\u5e94\u7528\u7a0b\u5e8f\u53ef\u89c1
\n excelApp.Visible = true;<\/p>\n
\/\/ \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5de5\u4f5c\u7c3f
\n Excel.Workbook workbook = excelApp.Workbooks.Add(Type.Missing);
\n Excel._Worksheet worksheet = workbook.Sheets["Sheet1"];<\/p>\n
\/\/ \u5728\u7b2c\u4e00\u4e2a\u5355\u5143\u683c\u5199\u5165\u6570\u636e
\n worksheet.Cells[1, 1] = "Hello, World!";<\/p>\n
\/\/ \u4fdd\u5b58\u5de5\u4f5c\u7c3f
\n workbook.SaveAs(@"C:\\\\path\\\\to\\\\your\\\\document.xlsx");<\/p>\n
\/\/ \u6e05\u7406\u5e76\u9000\u51fa
\n workbook.Close(false);
\n excelApp.Quit();<\/p>\n
\/\/ \u91ca\u653e\u5bf9\u8c61
\n System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);
\n System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
\n System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp);
\n \/\/ \u8bbe\u7f6e\u4e3anull，\u5e2e\u52a9\u5783\u573e\u56de\u6536
\n worksheet = null;
\n workbook = null;
\n excelApp = null;
\n }
\n }
\n}<\/p>\n
\u4e0a\u8ff0\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u5728C#\u4e2d\u4f7f\u7528COM\u4e92\u64cd\u4f5c\u6280\u672f\u521b\u5efaExcel\u5e94\u7528\u7a0b\u5e8f\u5b9e\u4f8b，\u64cd\u4f5c\u5de5\u4f5c\u7c3f\u548c\u5de5\u4f5c\u8868，\u5e76\u4fdd\u5b58\u6587\u4ef6\u3002\u6bcf\u4e00\u6b65\u7684\u6ce8\u91ca\u63cf\u8ff0\u4e86\u4ee3\u7801\u7684\u529f\u80fd\u548c\u6267\u884c\u903b\u8f91\u3002\u5728\u4f7f\u7528\u5b8cCOM\u5bf9\u8c61\u540e，\u4ee3\u7801\u901a\u8fc7 Marshal.ReleaseComObject \u65b9\u6cd5\u663e\u5f0f\u91ca\u653eCOM\u5bf9\u8c61\u7684\u5f15\u7528，\u5e76\u5c06\u5bf9\u8c61\u8bbe\u7f6e\u4e3anull，\u4ee5\u8f85\u52a9.NET\u7684\u5783\u573e\u56de\u6536\u5668\u56de\u6536\u8fd9\u4e9b\u5bf9\u8c61\u3002 <\/p>\n
\u5982\u524d\u6587\u6240\u8ff0，\u6dfb\u52a0COM\u5f15\u7528\u662f\u4f7f\u7528COM\u7ec4\u4ef6\u7684\u7b2c\u4e00\u6b65\u3002\u5728Visual Studio\u4e2d，\u8fd9\u4e2a\u8fc7\u7a0b\u7b80\u5355\u76f4\u63a5： <\/p>\n
\u5c01\u88c5COM\u63a5\u53e3\u548c\u7c7b\u5141\u8bb8.NET\u4ee3\u7801\u4ee5\u66f4\u52a0\u7c7b\u578b\u5b89\u5168\u7684\u65b9\u5f0f\u4f7f\u7528COM\u7ec4\u4ef6\u3002\u5728.NET\u4e2d，\u6bcf\u4e00\u4e2aCOM\u63a5\u53e3\u90fd\u5bf9\u5e94\u4e00\u4e2a\u7531RCW\u5c01\u88c5\u7684\u6258\u7ba1\u63a5\u53e3\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u81ea\u5df1\u7684\u6258\u7ba1\u63a5\u53e3\u6216\u7c7b\u6765\u5c01\u88c5COM\u63a5\u53e3\u548c\u7c7b\u7684\u8c03\u7528\u3002 <\/p>\n
\/\/ \u793a\u4f8b：\u5c01\u88c5Excel\u7684COM\u63a5\u53e3<\/p>\n
\/\/ \u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u6765\u81eaCOM\u7ec4\u4ef6\u7684\u63a5\u53e3IExcelWorksheet
\n\/\/ \u6211\u4eec\u53ef\u4ee5\u5728C#\u4e2d\u521b\u5efa\u4e00\u4e2a\u5c01\u88c5\u63a5\u53e3\u6216\u7c7b\u6765\u4f7f\u7528\u5b83
\npublic class ExcelWorksheet : IDisposable
\n{
\n private Excel._Worksheet _worksheet;<\/p>\n
public ExcelWorksheet(Excel._Worksheet worksheet)
\n {
\n _worksheet = worksheet;
\n }<\/p>\n
\/\/ \u5c01\u88c5COM\u63a5\u53e3\u7684\u65b9\u6cd5\u548c\u5c5e\u6027
\n public void WriteCell(int row, int column, string value)
\n {
\n _worksheet.Cells[row, column] = value;
\n }<\/p>\n
\/\/ \u5b9e\u73b0IDisposable\u63a5\u53e3\u4ee5\u6b63\u786e\u6e05\u7406\u8d44\u6e90
\n public void Dispose()
\n {
\n System.Runtime.InteropServices.Marshal.ReleaseComObject(_worksheet);
\n _worksheet = null;
\n }
\n}<\/p>\n
\u5728.NET\u4e2d\u8bbf\u95eeCOM\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5，\u901a\u5e38\u5c31\u50cf\u8c03\u7528\u666e\u901a\u7684.NET\u65b9\u6cd5\u4e00\u6837\u3002\u7136\u800c，\u56e0\u4e3aCOM\u5bf9\u8c61\u662f\u57fa\u4e8e\u65e9\u671f\u7ed1\u5b9a\u7684，\u6240\u4ee5\u5728\u8c03\u7528\u4e4b\u524d\u9700\u8981\u901a\u8fc7V-Table\u6765\u786e\u5b9a\u65b9\u6cd5\u7684\u4f4d\u7f6e\u3002 <\/p>\n
\/\/ \u793a\u4f8b：\u4f7f\u7528\u5c01\u88c5\u7c7b\u8bbf\u95eeExcel\u5de5\u4f5c\u8868\u7684\u5c5e\u6027\u548c\u65b9\u6cd5
\nusing ComInteropExample; \/\/ \u5047\u8bbe\u4e4b\u524d\u521b\u5efa\u7684\u5c01\u88c5\u7c7b\u6240\u5728\u7684\u547d\u540d\u7a7a\u95f4<\/p>\n
namespace ExcelInteropApp
\n{
\n class Program
\n {
\n static void Main(string[] args)
\n {
\n \/\/ \u521b\u5efa\u4e00\u4e2a\u65b0\u7684Excel\u5de5\u4f5c\u8868\u5b9e\u4f8b
\n ExcelWorksheet worksheet = new ExcelWorksheet(new Excel.Worksheet());<\/p>\n
\/\/ \u4f7f\u7528\u5c01\u88c5\u7c7b\u7684\u65b9\u6cd5\u5199\u5165\u5355\u5143\u683c
\n worksheet.WriteCell(1, 1, "Hello, COM Interop!");<\/p>\n
\/\/ \u91ca\u653e\u8d44\u6e90
\n worksheet.Dispose();
\n }
\n }
\n}<\/p>\n
COM\u7ec4\u4ef6\u53ef\u4ee5\u66b4\u9732\u4e8b\u4ef6\u7ed9\u5ba2\u6237\u7aef，\u4f46\u8fd9\u8981\u6c42\u5728.NET\u4ee3\u7801\u4e2d\u5b9e\u73b0\u4e8b\u4ef6\u5904\u7406\u903b\u8f91，\u5e76\u8fdb\u884c\u5c01\u9001\u5904\u7406\u3002\u5728C#\u4e2d\u5904\u7406COM\u4e8b\u4ef6\u6bd4\u5904\u7406.NET\u4e8b\u4ef6\u8981\u590d\u6742，\u56e0\u4e3aCOM\u4e8b\u4ef6\u662f\u57fa\u4e8e\u56de\u8c03\u7684，\u901a\u5e38\u9700\u8981\u4f7f\u7528 Delegate.Combine \u548c Delegate.Remove \u6765\u6dfb\u52a0\u548c\u79fb\u9664\u4e8b\u4ef6\u76d1\u542c\u5668\u3002 <\/p>\n
\/\/ \u793a\u4f8b：\u5904\u7406COM\u5bf9\u8c61\u7684\u4e8b\u4ef6（\u4ee5Excel\u4e3a\u4f8b）<\/p>\n
public class ExcelEventHandlers : Excel.D C\u00f9ngWorkbookEvents_Event
\n{
\n \/\/ \u8fde\u63a5\u4e8b\u4ef6\u5904\u7406\u51fd\u6570
\n public void WorkbookOpen(Excel.Workbook Wb)
\n {
\n \/\/ \u5f53Excel\u5de5\u4f5c\u7c3f\u6253\u5f00\u65f6\u6267\u884c\u7684\u4ee3\u7801
\n Console.WriteLine("Workbook opened.");
\n }<\/p>\n
public void WorkbookBeforeClose(Excel.Workbook Wb, ref bool Cancel)
\n {
\n \/\/ \u5728Excel\u5de5\u4f5c\u7c3f\u5173\u95ed\u4e4b\u524d\u6267\u884c\u7684\u4ee3\u7801
\n Console.WriteLine("Workbook is closing.");
\n }
\n}<\/p>\n
\/\/ \u5728\u5b9e\u9645\u4f7f\u7528\u4e2d，\u8fd8\u9700\u8981\u4f7f\u7528\u7c7b\u4f3c\u4ee5\u4e0b\u7684\u4ee3\u7801\u6765\u8fde\u63a5\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u548cCOM\u4e8b\u4ef6
\nExcel.Application excelApp = new Excel.Application();
\nExcel.Workbook workbook = excelApp.Workbooks.Add(Type.Missing);
\nExcelEventHandlers eventHandlers = new ExcelEventHandlers();
\n\/\/ \u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668
\n((Excel._ApplicationEvents_Event)excelApp).Open += new Excel._ApplicationEvents_OpenEventHandler(eventHandlers.WorkbookOpen);
\n((Excel._WorkbookEvents_Event)workbook).BeforeClose += new Excel._WorkbookEvents_BeforeCloseEventHandler(eventHandlers.WorkbookBeforeClose);<\/p>\n
\u5728\u5904\u7406COM\u4e8b\u4ef6\u65f6，\u4e00\u5b9a\u8981\u6ce8\u610f\u5c01\u9001\u95ee\u9898，\u56e0\u4e3a.NET\u548cCOM\u5728\u6570\u636e\u7c7b\u578b\u548c\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u4e0a\u5b58\u5728\u5dee\u5f02\u3002\u4e0a\u9762\u7684\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u901a\u8fc7\u5f3a\u7c7b\u578b\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u7c7b\u6765\u5c01\u88c5COM\u4e8b\u4ef6，\u5e76\u5728.NET\u4ee3\u7801\u4e2d\u8fdb\u884c\u8c03\u7528\u3002 <\/p>\n
\u5728\u5904\u7406COM\u5bf9\u8c61\u65f6，\u8d44\u6e90\u7ba1\u7406\u53d8\u5f97\u5c24\u4e3a\u91cd\u8981\u3002\u7531\u4e8eCOM\u5bf9\u8c61\u901a\u5e38\u4f7f\u7528\u5f15\u7528\u8ba1\u6570\u673a\u5236，\u56e0\u6b64\u5728.NET\u4e2d，\u5fc5\u987b\u786e\u4fdd\u5728\u4e0d\u518d\u9700\u8981\u65f6\u663e\u5f0f\u91ca\u653eCOM\u5bf9\u8c61，\u4ee5\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u3002\u5728\u5c01\u88c5\u7c7b\u4e2d\u5b9e\u73b0 IDisposable \u63a5\u53e3\u662f\u4e00\u4e2a\u826f\u597d\u7684\u5b9e\u8df5，\u53ef\u4ee5\u786e\u4fdd\u5f53\u5c01\u88c5\u7c7b\u7684\u5b9e\u4f8b\u4e0d\u518d\u88ab\u4f7f\u7528\u65f6，\u901a\u8fc7\u8c03\u7528 Dispose \u65b9\u6cd5\u6765\u6e05\u7406\u8d44\u6e90\u3002 <\/p>\n
\/\/ \u793a\u4f8b：\u5b9e\u73b0IDisposable\u63a5\u53e3\u4ee5\u7ba1\u7406COM\u8d44\u6e90<\/p>\n
public class ExcelWorksheet : IDisposable
\n{
\n private Excel._Worksheet _worksheet;<\/p>\n
public ExcelWorksheet(Excel._Worksheet worksheet)
\n {
\n _worksheet = worksheet;
\n }<\/p>\n
public void Dispose()
\n {
\n if (_worksheet != null)
\n {
\n System.Runtime.InteropServices.Marshal.ReleaseComObject(_worksheet);
\n _worksheet = null;
\n }
\n GC.SuppressFinalize(this);
\n }
\n}<\/p>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d，\u5f53\u8c03\u7528 Dispose \u65b9\u6cd5\u65f6，\u4f1a\u91ca\u653eCOM\u5bf9\u8c61\u7684\u5f15\u7528，\u5c06\u6258\u7ba1\u5bf9\u8c61\u8bbe\u7f6e\u4e3anull，\u5e76\u901a\u77e5\u5783\u573e\u56de\u6536\u5668\u4e0d\u518d\u8c03\u7528\u5bf9\u8c61\u7684\u7ec8\u7ed3\u5668\u3002 <\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u5f00\u53d1\u8005\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u4e2a\u5173\u952e\u70b9： <\/p>\n
\u5f02\u5e38\u5904\u7406 ：\u7531\u4e8eCOM\u548c.NET\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\u4e0d\u540c，\u5f00\u53d1\u8005\u9700\u8981\u786e\u4fdd\u5728\u5904\u7406COM\u4e8b\u4ef6\u6216\u65b9\u6cd5\u8c03\u7528\u65f6\u6b63\u786e\u6355\u83b7\u5e76\u5904\u7406\u5f02\u5e38\u3002 <\/p>\n<\/li>\n
\u7ebf\u7a0b\u5b89\u5168 ：\u8bb8\u591aCOM\u7ec4\u4ef6\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u3002\u5982\u679c\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u4f7f\u7528\u8fd9\u4e9b\u7ec4\u4ef6，\u9700\u8981\u81ea\u5df1\u5904\u7406\u7ebf\u7a0b\u540c\u6b65\u95ee\u9898\u3002 <\/p>\n<\/li>\n
\u5c01\u9001\u8c03\u7528 ：COM\u65b9\u6cd5\u901a\u5e38\u9700\u8981\u5c01\u9001\u8c03\u7528\u4ee5\u8f6c\u6362\u6570\u636e\u7c7b\u578b\u3002\u5728C#\u4e2d，\u5f00\u53d1\u8005\u53ef\u4ee5\u4f7f\u7528 ref \u5173\u952e\u5b57\u548c out \u5173\u952e\u5b57\u6765\u8fdb\u884c\u5c01\u9001\u3002 <\/p>\n<\/li>\n
\u5185\u5b58\u6cc4\u6f0f\u9884\u9632 ：\u786e\u4fdd\u5728\u4e0d\u518d\u9700\u8981COM\u5bf9\u8c61\u65f6\u53ca\u65f6\u91ca\u653e\u5f15\u7528，\u7279\u522b\u662f\u5728\u4f7f\u7528\u5468\u671f\u8f83\u957f\u7684\u5bf9\u8c61\u65f6\u3002 <\/p>\n<\/li>\n<\/ul>\n
\u901a\u8fc7\u4ee5\u4e0a\u5185\u5bb9，\u6211\u4eec\u8be6\u7ec6\u5206\u6790\u4e86COM Interop\u6280\u672f\u7684\u57fa\u7840\u77e5\u8bc6\u3001\u4f7f\u7528\u65b9\u6cd5\u3001\u5b9e\u8df5\u5e94\u7528\u4ee5\u53ca\u6ce8\u610f\u4e8b\u9879\u3002\u5e0c\u671b\u8fd9\u4e9b\u4fe1\u606f\u80fd\u591f\u5e2e\u52a9\u60a8\u5728\u5b9e\u9645\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u66f4\u52a0\u6709\u6548\u5730\u5229\u7528COM\u6280\u672f\u3002 <\/p>\n
OPC Group\u662f\u4e00\u4e2a\u7528\u6765\u7ec4\u7ec7Items\u7684\u903b\u8f91\u5355\u5143，\u5141\u8bb8\u5ba2\u6237\u7aef\u5bf9\u591a\u4e2aItem\u8fdb\u884c\u5206\u7ec4\u7ba1\u7406\u3002\u5728C#\u4e2d，\u53ef\u4ee5\u4f7f\u7528 Opc.Da.Server \u7c7b\u7684 CreateGroup \u65b9\u6cd5\u6765\u521b\u5efa\u4e00\u4e2aGroup\u3002\u521b\u5efaGroup\u4e4b\u540e，\u9700\u8981\u5bf9\u5b83\u8fdb\u884c\u914d\u7f6e，\u5305\u62ec\u8bbe\u7f6eGroup\u7684\u540d\u79f0\u3001\u662f\u5426\u6fc0\u6d3b\u4ee5\u53ca\u6fc0\u6d3b\u7684\u65f6\u95f4\u95f4\u9694\u7b49\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u521b\u5efa\u5e76\u914d\u7f6eOPC Group
\nstring groupID = "MyGroup";
\nstring groupName = "MyOPCGroup";
\nint updateRate = 1000; \/\/ \u66f4\u65b0\u95f4\u9694，\u5355\u4f4d\u6beb\u79d2<\/p>\n
\/\/ \u521b\u5efaGroup
\nGroupState groupState = new GroupState();
\ngroupState.IsActive = true; \/\/ \u8bbe\u7f6eGroup\u4e3a\u6fc0\u6d3b\u72b6\u6001
\ngroupState.Name = groupName;
\ngroupState.UpdateRate = updateRate;<\/p>\n
\/\/ \u6dfb\u52a0Group\u5230\u670d\u52a1\u5668
\nshort groupHandle = server.CreateGroup(groupID, groupState, out Opc.Da.GroupStateResult result);
\nif (groupHandle == 0)
\n{
\n throw new Exception("Unable to create group");
\n}<\/p>\n
\/\/ \u6fc0\u6d3bGroup
\nserver.SetState(groupHandle, ref groupState);<\/p>\n
\u5728\u6b64\u4ee3\u7801\u5757\u4e2d， GroupState \u7c7b\u7684\u5b9e\u4f8b groupState \u88ab\u7528\u6765\u5b9a\u4e49Group\u7684\u72b6\u6001，\u5305\u62ec\u5b83\u7684\u6fc0\u6d3b\u72b6\u6001\u3001\u540d\u79f0\u548c\u66f4\u65b0\u7387\u3002\u7136\u540e\u8c03\u7528 CreateGroup \u65b9\u6cd5\u521b\u5efaGroup，\u5e76\u901a\u8fc7 SetState \u65b9\u6cd5\u6fc0\u6d3b\u5b83\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u662fOPC\u6570\u636e\u4ea4\u4e92\u7684\u8d77\u70b9，\u7ba1\u7406\u7740\u540e\u7eed\u6240\u6709Items\u7684\u8bfb\u5199\u64cd\u4f5c\u3002 <\/p>\n
\u5728\u7ba1\u7406Group\u65f6，\u6fc0\u6d3bGroup\u610f\u5473\u7740\u542f\u52a8\u6570\u636e\u66f4\u65b0\u670d\u52a1，\u800c\u5173\u95edGroup\u5219\u505c\u6b62\u6570\u636e\u66f4\u65b0\u3002\u6fc0\u6d3bGroup\u65f6，\u670d\u52a1\u5668\u4f1a\u6839\u636eGroup\u7684\u66f4\u65b0\u7387\u5b9a\u65f6\u5237\u65b0Group\u4e2dItems\u7684\u503c\u3002\u5173\u95edGroup\u5219\u505c\u6b62\u8fd9\u4e2a\u670d\u52a1\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u6fc0\u6d3b\u548c\u5173\u95edGroup
\n\/\/ \u5047\u8bbegroupHandle\u4e3a\u6709\u6548\u7684Group\u53e5\u67c4
\n\/\/ \u6fc0\u6d3bGroup
\ngroupState.IsActive = true;
\nserver.SetState(groupHandle, ref groupState);<\/p>\n
\/\/ \u5173\u95edGroup
\ngroupState.IsActive = false;
\nserver.SetState(groupHandle, ref groupState);<\/p>\n
Group\u7684\u6fc0\u6d3b\u548c\u5173\u95ed\u662f\u901a\u8fc7\u6539\u53d8 GroupState \u7684 IsActive \u5c5e\u6027\u5e76\u8c03\u7528 SetState \u65b9\u6cd5\u5b9e\u73b0\u7684\u3002\u6b63\u786e\u7ba1\u7406Group\u7684\u6fc0\u6d3b\u4e0e\u5173\u95ed\u5bf9\u4e8e\u4f18\u5316\u670d\u52a1\u5668\u8d44\u6e90\u7684\u4f7f\u7528\u81f3\u5173\u91cd\u8981，\u5c24\u5176\u662f\u5728\u8d44\u6e90\u53d7\u9650\u7684\u73af\u5883\u4e2d\u3002 <\/p>\n
Items\u662fGroup\u4e2d\u7684\u6570\u636e\u70b9，\u6bcf\u4e2aItem\u4ee3\u8868\u670d\u52a1\u5668\u4e0a\u4e00\u4e2a\u5177\u4f53\u7684\u6570\u636e\u9879\u3002\u5728C#\u4e2d，\u53ef\u4ee5\u901a\u8fc7Group\u5bf9\u8c61\u6dfb\u52a0Item，\u5e76\u5bf9\u8fd9\u4e9bItem\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u6dfb\u52a0Items
\nItemState itemState = new ItemState();
\nitemState.ItemName = "Item1";
\nitemState.IsActive = true;<\/p>\n
string[] itemIDs = new string[1];
\nOpc.Da.ItemResult[] itemResults = new Opc.Da.ItemResult[1];<\/p>\n
\/\/ \u6dfb\u52a0Item\u5230Group
\nserver.AddItems(groupHandle, new ItemState[] { itemState }, out Opc.Da.ItemResult[] itemResults);<\/p>\n
\/\/ \u8bfb\u53d6Item\u7684\u503c
\nobject value;
\nobject quality;
\nobject timestamp;
\nserver.Read(groupHandle, Opc.Da.ItemIdentifierMask.All, 1000, itemIDs, out Opc.Da.DataValue[] values);<\/p>\n
\/\/ \u5199\u5165Item\u7684\u503c
\nvalues[0].Value = "NewValue";
\nserver.Write(groupHandle, new Opc.Da.ItemIdentifier[] { new Opc.Da.ItemIdentifier(itemIDs[0], Opc.Da.ItemStateMask.All) }, new Opc.Da.DataValue[] { values[0] });<\/p>\n
\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d， ItemState \u7c7b\u7528\u6765\u5b9a\u4e49Item\u7684\u5c5e\u6027\u3002\u9996\u5148\u521b\u5efa\u4e86\u4e00\u4e2a ItemState \u5b9e\u4f8b\u5e76\u8bbe\u7f6e\u4e86Item\u7684\u540d\u79f0，\u7136\u540e\u8c03\u7528 AddItems \u65b9\u6cd5\u5c06\u5176\u6dfb\u52a0\u5230Group\u4e2d\u3002\u4e4b\u540e，\u53ef\u4ee5\u4f7f\u7528 Read \u548c Write \u65b9\u6cd5\u5bf9Item\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u3002\u8bfb\u64cd\u4f5c\u8fd4\u56de\u6570\u636e\u7684\u503c\u3001\u8d28\u91cf\u548c\u65f6\u95f4\u6233，\u800c\u5199\u64cd\u4f5c\u5219\u5141\u8bb8\u66f4\u65b0Item\u7684\u503c\u3002 <\/p>\n
\u4e3a\u4e86\u53ca\u65f6\u54cd\u5e94Items\u503c\u7684\u53d8\u5316，\u53ef\u4ee5\u8bbe\u7f6e\u76d1\u63a7\u4e8b\u4ef6\u3002\u76d1\u63a7\u53ef\u4ee5\u662f\u540c\u6b65\u7684\u4e5f\u53ef\u4ee5\u662f\u5f02\u6b65\u7684，\u5b83\u5141\u8bb8\u5ba2\u6237\u7aef\u6839\u636e\u6570\u636e\u9879\u503c\u7684\u53d8\u5316\u6765\u6267\u884c\u7279\u5b9a\u64cd\u4f5c\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u8bbe\u7f6eItem\u76d1\u63a7
\nItemMonitoringParameters[] monitoringParams = new ItemMonitoringParameters[]
\n{
\n new ItemMonitoringParameters(itemIDs[0], Opc.Da.MonitoringType.Base, 0.1, 1000)
\n};<\/p>\n
\/\/ \u542f\u52a8\u76d1\u63a7
\nshort[] subHandles = new short[1];
\nserver.SetMonitoringState(groupHandle, monitoringParams, out Opc.Da.SubscriptionState[] states, out subHandles);<\/p>\n
\/\/ \u5f02\u6b65\u83b7\u53d6\u76d1\u63a7\u4e8b\u4ef6
\n\/\/ … (\u6b64\u5904\u9700\u8981\u5904\u7406\u5f02\u6b65\u8bfb\u53d6\u4e8b\u4ef6\u7684\u903b\u8f91)<\/p>\n
\u5728\u4ee3\u7801\u6bb5\u4e2d， ItemMonitoringParameters \u7c7b\u7528\u6765\u5b9a\u4e49\u76d1\u63a7\u53c2\u6570，\u5982\u76d1\u63a7\u7c7b\u578b\u3001\u6b7b\u533a\u503c\u548c\u66f4\u65b0\u95f4\u9694\u3002\u7136\u540e\u8c03\u7528 SetMonitoringState \u65b9\u6cd5\u6765\u542f\u52a8\u76d1\u63a7，\u5e76\u4f7f\u7528\u5f02\u6b65\u65b9\u5f0f\u83b7\u53d6\u76d1\u63a7\u4e8b\u4ef6\u3002\u8fd9\u9700\u8981\u8fdb\u4e00\u6b65\u5b9e\u73b0\u5f02\u6b65\u8bfb\u53d6\u4e8b\u4ef6\u7684\u903b\u8f91\u5904\u7406\u3002 <\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b，\u9700\u8981\u5904\u7406\u7684\u662f\u4e00\u4e2a\u5305\u542b\u591a\u4e2a\u6570\u636e\u9879\u7684\u590d\u6742\u6570\u636e\u7ed3\u6784\u3002\u4f8b\u5982，\u4e00\u4e2a\u5305\u542b\u6e29\u5ea6\u3001\u538b\u529b\u548c\u6d41\u91cf\u7684\u4f20\u611f\u5668\u6570\u636e\u7ec4\u3002\u5728OPC\u4e2d，\u8fd9\u7c7b\u6570\u636e\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u6216\u7ed3\u6784\u4f53\u7684\u65b9\u5f0f\u8fdb\u884c\u7ec4\u7ec7\u548c\u4f20\u8f93\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u5904\u7406\u7ed3\u6784\u5316\u6570\u636e
\n\/\/ \u5047\u8bbe\u5df2\u6709\u4e00\u4e2a\u5305\u542b\u591a\u4e2aItems\u7684\u7ec4\u548c\u7ed3\u6784\u5316\u6570\u636e\u7684\u5b9a\u4e49
\nItemState[] items = …; \/\/ \u7ed3\u6784\u5316\u6570\u636e\u7684Items\u6570\u7ec4<\/p>\n
\/\/ \u6dfb\u52a0\u7ed3\u6784\u5316Items\u5230Group
\nserver.AddItems(groupHandle, items, out Opc.Da.ItemResult[] itemResults);<\/p>\n
\/\/ \u8bfb\u53d6\u7ed3\u6784\u5316Items\u7684\u503c
\nserver.Read(groupHandle, Opc.Da.ItemIdentifierMask.All, 1000, itemIDs, out Opc.Da.DataValue[] values);<\/p>\n
\u5904\u7406\u7ed3\u6784\u5316\u6570\u636e\u65f6，\u5173\u952e\u662f\u786e\u4fdd\u6570\u636e\u9879\u7684\u987a\u5e8f\u548c\u7c7b\u578b\u5b8c\u5168\u5339\u914d\u670d\u52a1\u5668\u7aef\u7684\u5b9a\u4e49\u3002\u5728\u8bfb\u53d6\u64cd\u4f5c\u4e4b\u540e，\u8fd4\u56de\u7684 DataValue \u6570\u7ec4\u4e2d\u5305\u542b\u4e86\u7ed3\u6784\u5316\u6570\u636e\u7684\u6240\u6709\u503c\u3002 <\/p>\n
\u540c\u6b65\u8bfb\u53d6\u64cd\u4f5c\u4f1a\u963b\u585e\u7a0b\u5e8f\u6267\u884c\u76f4\u5230\u6570\u636e\u8bfb\u53d6\u5b8c\u6210\u3002\u800c\u5f02\u6b65\u8bfb\u53d6\u5219\u5141\u8bb8\u7a0b\u5e8f\u5728\u7b49\u5f85\u6570\u636e\u65f6\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1\u3002\u5728C#\u4e2d，\u53ef\u4ee5\u901a\u8fc7 IOpcGroup \u63a5\u53e3\u7684\u5f02\u6b65\u65b9\u6cd5\u6765\u5b9e\u73b0\u6570\u636e\u7684\u5f02\u6b65\u8bfb\u53d6\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u5f02\u6b65\u8bfb\u53d6Items\u7684\u503c
\nobject asyncResult;
\nserver.BeginRead(groupHandle, Opc.Da.ItemIdentifierMask.All, itemIDs, out asyncResult);<\/p>\n
\/\/ \u5728\u9002\u5f53\u7684\u65f6\u673a\u8c03\u7528EndRead\u65b9\u6cd5\u83b7\u53d6\u7ed3\u679c
\nDataValue[] values = server.EndRead(asyncResult);<\/p>\n
\u5f02\u6b65\u64cd\u4f5c\u7684\u5b9e\u73b0\u9700\u8981\u5904\u7406\u56de\u8c03\u548c\u9519\u8bef\u5904\u7406\u903b\u8f91，\u786e\u4fdd\u5728\u6570\u636e\u5230\u8fbe\u65f6\u80fd\u591f\u6b63\u786e\u5730\u5904\u7406\u6570\u636e\u3002\u8fd9\u79cd\u65b9\u6cd5\u5bf9\u4e8e\u8d44\u6e90\u548c\u65f6\u95f4\u654f\u611f\u7684\u5e94\u7528\u7279\u522b\u6709\u7528，\u5b83\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u6709\u6548\u5730\u7ba1\u7406\u7a0b\u5e8f\u7684\u8d44\u6e90\u4f7f\u7528\u3002 <\/p>\n
\u4ee5\u4e0a\u662f\u9488\u5bf9OPC Group\u548cItems\u64cd\u4f5c\u7684\u8be6\u7ec6\u4ecb\u7ecd\u548c\u4ee3\u7801\u793a\u4f8b，\u901a\u8fc7\u7406\u8bba\u77e5\u8bc6\u4e0e\u5b9e\u9645\u64cd\u4f5c\u7684\u7ed3\u5408，\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63d0\u5347\u5f00\u53d1\u8005\u7684\u5b9e\u8df5\u80fd\u529b\u3002 <\/p>\n
# 5. \u8fde\u63a5\u4e0e\u65ad\u5f00OPC\u670d\u52a1\u5668<\/p>\n
## 5.1 OPC\u8fde\u63a5\u7684\u5efa\u7acb\u4e0e\u7ef4\u62a4<\/p>\n
\u5efa\u7acb\u548c\u7ef4\u62a4\u4e0eOPC\u670d\u52a1\u5668\u7684\u8fde\u63a5\u662f\u5b9e\u73b0\u6570\u636e\u4ea4\u4e92\u7684\u57fa\u7840\u3002\u5728\u672c\u8282\u4e2d，\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8\u5728C#\u73af\u5883\u4e2d\u4e0eOPC\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u7684\u5404\u4e2a\u8fc7\u7a0b，\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u8fde\u63a5\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u51fa\u73b0\u7684\u4e0d\u540c\u72b6\u6001\u548c\u9519\u8bef\u3002<\/p>\n
### 5.1.1 \u8fde\u63a5\u8fc7\u7a0b\u4e2d\u7684\u5404\u79cd\u72b6\u6001\u548c\u9519\u8bef<\/p>\n
\u8fde\u63a5OPC\u670d\u52a1\u5668\u65f6，\u53ef\u80fd\u9047\u5230\u591a\u79cd\u72b6\u6001\u548c\u9519\u8bef\u3002\u5728C#\u4ee3\u7801\u4e2d，\u6211\u4eec\u9700\u8981\u901a\u8fc7 OPC \u7684\u81ea\u52a8\u5316\u63a5\u53e3\u68c0\u67e5\u8fde\u63a5\u72b6\u6001，\u5408\u7406\u5904\u7406\u8fd9\u4e9b\u72b6\u6001\u548c\u9519\u8bef\u3002\u8fd9\u91cc\u4ee5 .NET \u7684 OPC Foundation \u5e93\u4e3a\u4f8b，\u8fdb\u884c\u9610\u8ff0\u3002<\/p>\n
```csharp
\n\/\/ OPC\u8fde\u63a5\u4ee3\u7801\u793a\u4f8b
\nIOPCServer server = null;
\nserver = new OPCServer();
\n\/\/ … \u521d\u59cb\u5316OPC\u670d\u52a1\u5668
\n\/\/ Connect to the OPC server
\nobject serverState = new object();
\nstring serverName = "Localhost";
\nstring sProgID = "OPCServerProgID";
\nobject pTime = new object();
\nhr = server.Connect(serverName, sProgID, out serverState, out pTime);
\nif (hr < 0)
\n{
\n \/\/ Handle error
\n int errorcode = hr;
\n \/\/ … \u5c06\u9519\u8bef\u7801\u8f6c\u6362\u4e3a\u5bf9\u5e94\u7684\u9519\u8bef\u4fe1\u606f
\n}<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d，\u6211\u4eec\u9996\u5148\u521b\u5efa\u4e86 OPCServer \u7c7b\u7684\u5b9e\u4f8b\u3002\u63a5\u7740\u4f7f\u7528 Connect \u65b9\u6cd5\u5c1d\u8bd5\u8fde\u63a5\u670d\u52a1\u5668\u3002\u5982\u679c\u8fde\u63a5\u5931\u8d25，\u6211\u4eec\u4ece\u8fd4\u56de\u7684 hr \u9519\u8bef\u7801\u83b7\u53d6\u5177\u4f53\u7684\u9519\u8bef\u4fe1\u606f\u3002 hr \u9519\u8bef\u7801\u662f\u4e00\u4e2a\u5305\u542b\u5404\u79cdOPC\u9519\u8bef\u5b9a\u4e49\u7684\u679a\u4e3e\u503c\u3002 <\/p>\n
\u8fde\u63a5\u4fdd\u6301\u5bf9\u4e8e\u7cfb\u7edf\u7a33\u5b9a\u8fd0\u884c\u975e\u5e38\u91cd\u8981\u3002\u53ef\u4ee5\u901a\u8fc7\u5b9a\u671f\u7684\u5fc3\u8df3\u68c0\u67e5\u6216\u8005\u91c7\u7528ping\/pong\u673a\u5236\u6765\u786e\u4fdd\u8fde\u63a5\u7684\u6709\u6548\u6027\u3002\u4e00\u65e6\u8fde\u63a5\u5931\u6548，\u9700\u8981\u53ca\u65f6\u89e6\u53d1\u91cd\u8fde\u673a\u5236\u3002 <\/p>\n
public void KeepConnectionAlive()
\n{
\n while (isConnected)
\n {
\n \/\/ \u53d1\u9001ping\u8bf7\u6c42
\n if (!server.Ping())
\n {
\n \/\/ \u91cd\u8fde\u673a\u5236
\n Reconnect();
\n }
\n Thread.Sleep(keepAliveInterval); \/\/ \u63a7\u5236ping\u7684\u9891\u7387
\n }
\n}<\/p>\n
\u5728\u4e0a\u8ff0\u4ee3\u7801\u6bb5\u4e2d， KeepConnectionAlive \u65b9\u6cd5\u4e2d\u5b9e\u73b0\u4e86\u4fdd\u6301\u8fde\u63a5\u7684\u7b56\u7565\u3002\u901a\u8fc7 server.Ping \u65b9\u6cd5\u5b9a\u671f\u68c0\u67e5\u8fde\u63a5\u72b6\u6001，\u5982\u679c\u8fde\u63a5\u5df2\u7ecf\u5931\u6548，\u8c03\u7528 Reconnect \u65b9\u6cd5\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5\u3002 <\/p>\n
\u5728\u4e0eOPC\u670d\u52a1\u5668\u7684\u4ea4\u4e92\u8fc7\u7a0b\u4e2d，\u67d0\u4e9b\u60c5\u51b5\u4e0b\u9700\u8981\u6709\u8ba1\u5212\u5730\u65ad\u5f00\u8fde\u63a5\u3002\u9664\u6b64\u4e4b\u5916，\u4e5f\u9700\u5904\u7406\u4e0d\u53ef\u9884\u89c1\u7684\u7f51\u7edc\u95ee\u9898\u5bfc\u81f4\u7684\u975e\u9884\u671f\u65ad\u8fde\u3002\u56e0\u6b64，\u5b9e\u73b0\u4e00\u4e2a\u5065\u58ee\u7684\u91cd\u8fde\u673a\u5236\u5c31\u663e\u5f97\u81f3\u5173\u91cd\u8981\u3002 <\/p>\n
\u65ad\u5f00\u8fde\u63a5\u4e4b\u524d，\u9700\u8981\u786e\u4fdd\u6240\u6709\u7684\u8d44\u6e90\u5df2\u7ecf\u6b63\u786e\u91ca\u653e，\u786e\u4fdd\u4e0d\u4f1a\u56e0\u4e3a\u975e\u9884\u671f\u7684\u65ad\u5f00\u800c\u9020\u6210\u6570\u636e\u4e22\u5931\u6216\u8005\u8d44\u6e90\u6cc4\u6f0f\u3002C#\u4e2d\u5e94\u5f53\u4f7f\u7528 try-finally \u5757\u6765\u786e\u4fdd\u8d44\u6e90\u7684\u6b63\u786e\u91ca\u653e\u3002 <\/p>\n
try
\n{
\n if (server != null)
\n {
\n if (server.Connected)
\n {
\n server.Disconnect();
\n isConnected = false;
\n }
\n }
\n}
\nfinally
\n{
\n \/\/ \u6e05\u7406\u8d44\u6e90，\u4f8b\u5982\u91ca\u653eCOM\u63a5\u53e3\u5f15\u7528
\n \/\/ \u5bf9\u8c61\u7684\u91ca\u653e
\n Marshal.ReleaseComObject(server);
\n server = null;
\n}<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u6bb5\u4e2d，\u6211\u4eec\u68c0\u67e5\u4e86 server \u662f\u5426\u4e3a null \u4ee5\u53ca\u662f\u5426\u8fd8\u5904\u4e8e\u8fde\u63a5\u72b6\u6001\u3002\u5982\u679c\u662f，\u5219\u8c03\u7528 Disconnect \u65b9\u6cd5\u65ad\u5f00\u8fde\u63a5\u3002\u65e0\u8bba\u8fde\u63a5\u662f\u5426\u6210\u529f\u65ad\u5f00， finally \u5757\u90fd\u4f1a\u6267\u884c，\u786e\u4fdd\u8d44\u6e90\u5f97\u5230\u91ca\u653e\u3002 <\/p>\n
\u4e3a\u4e86\u5e94\u5bf9\u975e\u9884\u671f\u7684\u65ad\u5f00\u8fde\u63a5，\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u81ea\u52a8\u91cd\u8fde\u7684\u673a\u5236\u3002\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u4e00\u4e2a\u5b9a\u65f6\u5668，\u5468\u671f\u6027\u68c0\u67e5\u8fde\u63a5\u72b6\u6001，\u4e00\u65e6\u68c0\u6d4b\u5230\u8fde\u63a5\u65ad\u5f00，\u4fbf\u5c1d\u8bd5\u81ea\u52a8\u91cd\u8fde\u3002 <\/p>\n
public void AutoReconnect()
\n{
\n while (true)
\n {
\n Thread.Sleep(reconnectInterval);
\n if (!isConnected)
\n {
\n try
\n {
\n Reconnect();
\n }
\n catch (Exception ex)
\n {
\n \/\/ \u8bb0\u5f55\u5f02\u5e38，\u7b49\u5f85\u4e0b\u4e00\u6b21\u91cd\u8bd5
\n LogException(ex);
\n }
\n }
\n }
\n}<\/p>\n
\u5728 AutoReconnect \u65b9\u6cd5\u4e2d，\u6211\u4eec\u4f7f\u7528\u4e86\u4e00\u4e2a\u5faa\u73af\u548c Thread.Sleep \u6765\u5b9e\u73b0\u5b9a\u65f6\u68c0\u67e5\u3002\u5982\u679c\u68c0\u6d4b\u5230\u672a\u8fde\u63a5\u72b6\u6001，\u5c31\u5c1d\u8bd5\u8c03\u7528 Reconnect \u65b9\u6cd5\u91cd\u8fde\u3002\u91cd\u8fde\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u629b\u51fa\u5f02\u5e38，\u8fd9\u65f6\u5019\u5f02\u5e38\u4f1a\u88ab\u6355\u83b7\u5e76\u8bb0\u5f55\u4e0b\u6765\u3002 <\/p>\n
\u5728\u8fde\u63a5OPC\u670d\u52a1\u5668\u65f6，\u5b89\u5168\u6027\u662f\u4e0d\u5bb9\u5ffd\u89c6\u7684\u95ee\u9898\u3002OPC\u670d\u52a1\u5668\u53ef\u80fd\u4f1a\u5b9e\u73b0\u4e0d\u540c\u7684\u5b89\u5168\u8ba4\u8bc1\u673a\u5236\u6765\u4fdd\u62a4\u6570\u636e\u7684\u4f20\u8f93\u5b89\u5168\u3002 <\/p>\n
\u4e0d\u540c\u7684OPC\u670d\u52a1\u5668\u53ef\u80fd\u8981\u6c42\u5ba2\u6237\u7aef\u8fdb\u884c\u8eab\u4efd\u9a8c\u8bc1\u3002\u5728C#\u4e2d，\u8eab\u4efd\u9a8c\u8bc1\u53ef\u4ee5\u901a\u8fc7\u5728\u8fde\u63a5\u65f6\u4f20\u9012\u7528\u6237\u540d\u548c\u5bc6\u7801\u6765\u5b9e\u73b0\u3002 <\/p>\n
hr = server.Connect(serverName, sProgID, out serverState, out pTime,
\n userID, password); \/\/ \u4f20\u9012\u8ba4\u8bc1\u4fe1\u606f<\/p>\n
\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d， Connect \u65b9\u6cd5\u8c03\u7528\u88ab\u6269\u5c55\u4e86，\u6dfb\u52a0\u4e86 userID \u548c password \u53c2\u6570\u4ee5\u652f\u6301\u8eab\u4efd\u9a8c\u8bc1\u3002\u8fd9\u8981\u6c42\u5f00\u53d1\u8005\u4e8b\u5148\u4e86\u89e3\u670d\u52a1\u5668\u6240\u8981\u6c42\u7684\u5b89\u5168\u534f\u8bae，\u5e76\u63d0\u4f9b\u6b63\u786e\u7684\u8ba4\u8bc1\u4fe1\u606f\u3002 <\/p>\n
\u4e3a\u4e86\u4fdd\u969c\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u5b89\u5168\u6027，OPC\u670d\u52a1\u5668\u53ef\u80fd\u652f\u6301\u6570\u636e\u52a0\u5bc6\u3002\u5f00\u53d1\u8005\u5e94\u5f53\u6839\u636e\u670d\u52a1\u5668\u63d0\u4f9b\u7684\u5b89\u5168\u9009\u9879\u6765\u5b9e\u65bd\u52a0\u5bc6\u63aa\u65bd\u3002 <\/p>\n
\/\/ \u793a\u4f8b：\u914d\u7f6e\u52a0\u5bc6\u4f20\u8f93
\n\/\/ OPC\u670d\u52a1\u5668\u53ef\u80fd\u63d0\u4f9b\u4e86\u914d\u7f6e\u52a0\u5bc6\u7684\u63a5\u53e3，\u5982 SetEncryptionLevel
\nserver.SetEncryptionLevel(EncryptionLevel.EncryptionLevelHigh);<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u914d\u7f6e\u670d\u52a1\u5668\u652f\u6301\u7684\u52a0\u5bc6\u7b49\u7ea7\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f，\u5e76\u4e0d\u662f\u6240\u6709\u7684OPC\u670d\u52a1\u5668\u90fd\u652f\u6301\u52a0\u5bc6\u4f20\u8f93，\u5f00\u53d1\u8005\u9700\u8981\u67e5\u9605\u76f8\u5173\u6587\u6863\u4ee5\u786e\u8ba4\u5e76\u5b9e\u73b0\u76f8\u5e94\u7684\u5b89\u5168\u63aa\u65bd\u3002 <\/p>\n
\u901a\u8fc7\u672c\u7ae0\u7684\u4ecb\u7ecd，\u60a8\u5e94\u8be5\u5df2\u7ecf\u638c\u63e1\u4e86\u5982\u4f55\u5728C#\u73af\u5883\u4e0b\u4e0eOPC\u670d\u52a1\u5668\u5efa\u7acb\u3001\u7ef4\u62a4\u4ee5\u53ca\u4f18\u5316\u8fde\u63a5\u3002\u540c\u65f6，\u6211\u4eec\u4e5f\u8ba8\u8bba\u4e86\u5b89\u5168\u6027\u65b9\u9762\u7684\u4e00\u4e9b\u8003\u8651，\u8fd9\u5c06\u5e2e\u52a9\u60a8\u786e\u4fdd\u6570\u636e\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u5b89\u5168\u6027\u548c\u5b8c\u6574\u6027\u3002\u968f\u7740\u5de5\u4e1a\u81ea\u52a8\u5316\u548c\u4fe1\u606f\u5316\u7684\u53d1\u5c55，\u8fd9\u4e9b\u6280\u80fd\u53d8\u5f97\u66f4\u52a0\u91cd\u8981，\u80fd\u591f\u5e2e\u52a9\u60a8\u6784\u5efa\u51fa\u66f4\u7a33\u5b9a\u3001\u5b89\u5168\u7684\u7cfb\u7edf\u3002 <\/p>\n
\u5728\u5de5\u4e1a\u81ea\u52a8\u5316\u548c\u6570\u636e\u91c7\u96c6\u7cfb\u7edf\u4e2d，\u5b9e\u65f6\u6570\u636e\u7684\u76d1\u63a7\u81f3\u5173\u91cd\u8981\u3002OPC DA (OLE for Process Control Data Access) \u6807\u51c6\u63d0\u4f9b\u4e86\u4e00\u79cd\u673a\u5236，\u8ba9\u5ba2\u6237\u7aef\u80fd\u591f\u8ba2\u9605\u670d\u52a1\u5668\u4e0a\u6570\u636e\u9879(value items)\u7684\u53d8\u5316，\u800c\u65e0\u9700\u4e0d\u65ad\u8f6e\u8be2\u8fd9\u4e9b\u503c，\u4ece\u800c\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u6548\u7387\u548c\u5b9e\u65f6\u6027\u3002\u5728\u8fd9\u4e00\u8282，\u6211\u4eec\u5c06\u6df1\u5165\u63a2\u8ba8\u6570\u636e\u8ba2\u9605\u7684\u5b9e\u73b0\u673a\u5236，\u5305\u62ec\u5176\u80cc\u540e\u7684\u540c\u6b65\u4e0e\u5f02\u6b65\u8fc7\u7a0b，\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u6570\u636e\u66f4\u65b0\u4e8b\u4ef6\u3002 <\/p>\n
\u6570\u636e\u8ba2\u9605\u7684\u8fc7\u7a0b\u6d89\u53ca\u5230\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u901a\u4fe1\u534f\u8bae，\u901a\u8fc7OPC DA\u7684\u8ba2\u9605\u63a5\u53e3，\u5ba2\u6237\u7aef\u53ef\u4ee5\u8bf7\u6c42\u670d\u52a1\u5668\u5468\u671f\u6027\u5730\u53d1\u9001\u6570\u636e\u53d8\u66f4\u901a\u77e5\u3002\u5ba2\u6237\u7aef\u5728\u521b\u5efa\u8ba2\u9605\u65f6，\u53ef\u4ee5\u6307\u5b9a\u76d1\u63a7\u7684\u6570\u636e\u9879\u3001\u6570\u636e\u66f4\u65b0\u95f4\u9694\u548c\u6570\u636e\u8d28\u91cf\u8981\u6c42\u7b49\u53c2\u6570\u3002 <\/p>\n
\u5728\u540c\u6b65\u673a\u5236\u4e2d，\u670d\u52a1\u5668\u5728\u63a5\u6536\u5230\u5ba2\u6237\u7aef\u7684\u8ba2\u9605\u8bf7\u6c42\u540e，\u4f1a\u5b9a\u671f\u68c0\u67e5\u6240\u8bf7\u6c42\u7684\u6570\u636e\u9879\u7684\u503c，\u5982\u679c\u503c\u53d1\u751f\u53d8\u5316，\u5219\u5c06\u66f4\u65b0\u7684\u6570\u636e\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u3002\u7136\u800c，\u5728\u9ad8\u9891\u7387\u7684\u6570\u636e\u66f4\u65b0\u60c5\u51b5\u4e0b，\u540c\u6b65\u673a\u5236\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5ba2\u6237\u7aef\u7684\u5904\u7406\u80fd\u529b\u6210\u4e3a\u74f6\u9888，\u5f71\u54cd\u6574\u4e2a\u7cfb\u7edf\u7684\u6027\u80fd\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u521b\u5efa\u8ba2\u9605\u5e76\u8bbe\u7f6e\u66f4\u65b0\u901f\u7387
\nIOPCItemMgt itemMgt = (IOPCItemMgt)server; \/\/ \u5047\u8bbeserver\u4e3a\u5df2\u8fde\u63a5\u7684\u670d\u52a1\u5668\u5bf9\u8c61
\nOPCITEMSTATE[] items = new OPCITEMSTATE[1];
\nstring[] itemIDs = new string[] { "ItemID" }; \/\/ OPC\u9879ID<\/p>\n
int[] hrErrors = new int[1];
\nitemMgt.BeginBatch();
\nitemMgt.AddItems(1, itemIDs, out hrErrors);
\nitemMgt.EndBatch();<\/p>\n
OPCITEMRESULT[] itemResults = new OPCITEMRESULT[1];
\nhrErrors[0] = itemMgt.GetResult(1, out itemResults);<\/p>\n
IOPCDataCallback callback = new MyOPCDataCallback(); \/\/ \u81ea\u5b9a\u4e49\u6570\u636e\u56de\u8c03\u5bf9\u8c61
\nint dwUpdateRate = 500; \/\/ \u66f4\u65b0\u95f4\u9694，\u5355\u4f4d\u6beb\u79d2
\nint hClientGroup = 1234; \/\/ \u5ba2\u6237\u7aef\u5b9a\u4e49\u7684\u7ec4\u53e5\u67c4<\/p>\n
hrErrors[0] = server.CreateGroup(hClientGroup, "MyGroup", true, callback, dwUpdateRate, out int hServerGroup);<\/p>\n
\u6570\u636e\u66f4\u65b0\u4e8b\u4ef6\u7684\u5904\u7406\u662f\u8ba2\u9605\u673a\u5236\u4e2d\u7684\u5173\u952e\u73af\u8282\u3002\u5f53\u670d\u52a1\u5668\u68c0\u6d4b\u5230\u8ba2\u9605\u9879\u7684\u6570\u636e\u53d1\u751f\u53d8\u5316\u65f6，\u5c06\u89e6\u53d1\u4e00\u4e2a\u4e8b\u4ef6，\u5e76\u8c03\u7528\u5ba2\u6237\u7aef\u63d0\u4f9b\u7684\u56de\u8c03\u51fd\u6570\u3002\u5ba2\u6237\u7aef\u901a\u8fc7\u8fd9\u4e2a\u56de\u8c03\u51fd\u6570\u6765\u5904\u7406\u8fd9\u4e9b\u66f4\u65b0\u7684\u6570\u636e\u3002 <\/p>\n
\u4e8b\u4ef6\u5904\u7406\u4ee3\u7801\u5757\u4e2d\u7684\u903b\u8f91\u901a\u5e38\u662f\u5f02\u6b65\u6267\u884c\u7684，\u4ee5\u907f\u514d\u963b\u585e\u5ba2\u6237\u7aef\u7a0b\u5e8f\u7684\u5176\u4ed6\u90e8\u5206\u3002\u56e0\u6b64，\u4e8b\u4ef6\u5904\u7406\u4ee3\u7801\u9700\u8981\u5177\u5907\u9ad8\u6548\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5316\u7684\u56de\u8c03\u51fd\u6570\u793a\u4f8b，\u5c55\u793a\u4e86\u5f53\u6570\u636e\u9879\u66f4\u65b0\u65f6\u5982\u4f55\u5904\u7406\u6570\u636e\u3002 <\/p>\n
public class MyOPCDataCallback : IOPCDataCallback
\n{
\n public void OnDataChange(int dwTransid, int hGroup, int hrMasterQuality,
\n int hrMasterError, int dwCount, ref tagOPCITEMSTATE pItemValues)
\n {
\n \/\/ dwTransid – \u4e8b\u52a1ID
\n \/\/ hGroup – \u670d\u52a1\u5668\u4e2d\u7684\u7ec4\u53e5\u67c4
\n \/\/ hrMasterQuality – \u4e3b\u8d28\u91cf
\n \/\/ hrMasterError – \u4e3b\u9519\u8bef\u4ee3\u7801
\n \/\/ dwCount – \u66f4\u65b0\u6570\u636e\u9879\u7684\u6570\u91cf
\n \/\/ ref tagOPCITEMSTATE[] – \u66f4\u65b0\u7684\u6570\u636e\u9879\u72b6\u6001\u6570\u7ec4<\/p>\n
\/\/ \u904d\u5386\u66f4\u65b0\u7684\u6570\u636e\u9879
\n for (int i = 0; i < dwCount; i++)
\n {
\n \/\/ \u5904\u7406\u6bcf\u4e2a\u6570\u636e\u9879\u7684\u66f4\u65b0\u503c
\n Console.WriteLine($"ItemID: {pItemValues[i].szAccessPath}, Value: {pItemValues[i].vData}");
\n }
\n }
\n}<\/p>\n
\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d， OnDataChange \u65b9\u6cd5\u4f1a\u5728\u670d\u52a1\u5668\u6709\u6570\u636e\u66f4\u65b0\u65f6\u88ab\u8c03\u7528，\u5b83\u63a5\u6536\u4e00\u7cfb\u5217\u53c2\u6570，\u5305\u62ec\u66f4\u65b0\u7684\u6570\u636e\u9879\u548c\u72b6\u6001\u3002\u5f00\u53d1\u8005\u9700\u8981\u5728\u8be5\u65b9\u6cd5\u4e2d\u6dfb\u52a0\u5904\u7406\u903b\u8f91，\u4ee5\u786e\u4fdd\u5f53\u6570\u636e\u9879\u66f4\u65b0\u65f6，\u76f8\u5e94\u7684\u4e1a\u52a1\u903b\u8f91\u80fd\u591f\u88ab\u6267\u884c\u3002\u8fd9\u53ef\u80fd\u5305\u62ec\u66f4\u65b0\u7528\u6237\u754c\u9762\u3001\u8bb0\u5f55\u65e5\u5fd7\u3001\u89e6\u53d1\u5176\u4ed6\u7cfb\u7edf\u52a8\u4f5c\u7b49\u3002 <\/p>\n
\u5728OPC DA\u6807\u51c6\u4e2d，\u9664\u4e86\u57fa\u672c\u7684\u6570\u636e\u66f4\u65b0\u4e8b\u4ef6\u5916，\u8fd8\u652f\u6301\u66f4\u4e3a\u590d\u6742\u548c\u5b9a\u5236\u5316\u7684\u4e8b\u4ef6\u5904\u7406\u6a21\u5f0f\u3002\u8fd9\u4e9b\u6a21\u5f0f\u5141\u8bb8\u5f00\u53d1\u8005\u5b9a\u4e49\u81ea\u5df1\u7684\u4e8b\u4ef6\u903b\u8f91，\u4ee5\u6ee1\u8db3\u7279\u5b9a\u7684\u4e1a\u52a1\u9700\u6c42\u3002 <\/p>\n
\u521b\u5efa\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u5904\u7406\u5668\u901a\u5e38\u610f\u5473\u7740\u5b9e\u73b0\u7279\u5b9a\u7684\u63a5\u53e3\u6216\u8005\u7ee7\u627f\u62bd\u8c61\u7c7b\u3002\u8fd9\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u66f4\u5927\u7684\u7075\u6d3b\u6027，\u4f7f\u5176\u80fd\u591f\u6839\u636e\u5e94\u7528\u7684\u5b9e\u9645\u60c5\u51b5\u7f16\u5199\u66f4\u7cbe\u7ec6\u7684\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\u3002 <\/p>\n
\u4f8b\u5982，\u5f00\u53d1\u8005\u53ef\u80fd\u9700\u8981\u4e3a\u7279\u5b9a\u7684\u4e1a\u52a1\u903b\u8f91\u521b\u5efa\u4e8b\u4ef6\u5904\u7406\u5668，\u6bd4\u5982\u5f53\u4e00\u4e2a\u7279\u5b9a\u7684\u6570\u636e\u9879\u503c\u8fbe\u5230\u67d0\u4e00\u9608\u503c\u65f6\u89e6\u53d1\u4e00\u4e2a\u62a5\u8b66，\u6216\u8005\u57fa\u4e8e\u6570\u636e\u53d8\u5316\u6267\u884c\u4e00\u7cfb\u5217\u590d\u6742\u7684\u4e1a\u52a1\u89c4\u5219\u3002 <\/p>\n
public class CustomOPCEventCallback : IOPCEventCallback
\n{
\n public void OnEvent(int hServer, int hClient, int dwEventGroup, int dwNumItems, int[] phServerItems, int[] pAdviseCookies, int[] pdwCancelID)
\n {
\n \/\/ hServer – \u670d\u52a1\u5668\u53e5\u67c4
\n \/\/ hClient – \u5ba2\u6237\u7aef\u53e5\u67c4
\n \/\/ dwEventGroup – \u4e8b\u4ef6\u7ec4\u6807\u8bc6
\n \/\/ dwNumItems – \u4e8b\u4ef6\u9879\u6570\u91cf
\n \/\/ phServerItems – \u670d\u52a1\u5668\u4e0a\u7684\u9879\u53e5\u67c4\u6570\u7ec4
\n \/\/ pAdviseCookies – \u4e0e\u5ba2\u6237\u7aef\u8bf7\u6c42\u76f8\u5173\u7684\u201c\u5efa\u8baecookie\u201d
\n \/\/ pdwCancelID – \u7528\u4e8e\u53d6\u6d88\u8ba2\u9605\u7684ID\u6570\u7ec4<\/p>\n
\/\/ \u5b9e\u73b0\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u5904\u7406\u903b\u8f91
\n for (int i = 0; i < dwNumItems; i++)
\n {
\n \/\/ \u5047\u8bbe\u6bcf\u4e2a\u9879\u7684ID\u548c\u65b0\u503c\u5728phServerItems[i]\u548cpItemValues\u4e2d
\n \/\/ \u53ef\u4ee5\u901a\u8fc7\u670d\u52a1\u5668\u63d0\u4f9b\u7684\u5176\u4ed6\u63a5\u53e3\u83b7\u53d6\u66f4\u65b0\u540e\u7684\u503c
\n Console.WriteLine($"Custom event triggered for item with handle: {phServerItems[i]}");
\n }
\n }
\n}<\/p>\n
\u9ad8\u7ea7\u4e8b\u4ef6\u5904\u7406\u6a21\u5f0f\u53ef\u80fd\u6d89\u53ca\u5230\u66f4\u590d\u6742\u7684\u4e8b\u4ef6\u8ba2\u9605\u548c\u7ba1\u7406\u903b\u8f91\u3002\u8fd9\u53ef\u80fd\u5305\u62ec\u5bf9\u4e8b\u4ef6\u7684\u8fc7\u6ee4\u3001\u4e8b\u4ef6\u4f18\u5148\u7ea7\u3001\u4e8b\u4ef6\u89e6\u53d1\u6761\u4ef6\u7684\u5b9a\u4e49\u7b49\u3002\u4f7f\u7528\u8fd9\u4e9b\u9ad8\u7ea7\u7279\u6027，\u5f00\u53d1\u8005\u53ef\u4ee5\u7cbe\u786e\u63a7\u5236\u4e8b\u4ef6\u4f55\u65f6\u89e6\u53d1，\u4ee5\u53ca\u89e6\u53d1\u4e8b\u4ef6\u65f6\u9700\u8981\u6267\u884c\u7684\u5177\u4f53\u64cd\u4f5c\u3002 <\/p>\n
\u4f8b\u5982，\u53ef\u4ee5\u521b\u5efa\u57fa\u4e8e\u65f6\u95f4\u3001\u6761\u4ef6\u3001\u6b7b\u533a\u6216\u5176\u4ed6\u7279\u5b9a\u89c4\u5219\u7684\u4e8b\u4ef6\u3002\u8fd9\u4e9b\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\u9700\u8981\u4e0e\u670d\u52a1\u5668\u7aef\u7684\u914d\u7f6e\u76f8\u5339\u914d，\u4ee5\u786e\u4fdd\u80fd\u591f\u6b63\u786e\u5730\u54cd\u5e94\u4e8b\u4ef6\u901a\u77e5\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u6839\u636e\u4e8b\u4ef6\u7c7b\u578b\u6765\u521b\u5efa\u4e0d\u540c\u7684\u8ba2\u9605\u7ec4
\nswitch (eventType)
\n{
\n case EventType.TimeBased:
\n \/\/ \u4e3a\u65f6\u95f4\u89e6\u53d1\u7684\u4e8b\u4ef6\u521b\u5efa\u8ba2\u9605\u7ec4
\n break;
\n case EventType.ValueChange:
\n \/\/ \u4e3a\u503c\u53d8\u5316\u89e6\u53d1\u7684\u4e8b\u4ef6\u521b\u5efa\u8ba2\u9605\u7ec4
\n break;
\n case EventType.Condition:
\n \/\/ \u4e3a\u7279\u5b9a\u6761\u4ef6\u89e6\u53d1\u7684\u4e8b\u4ef6\u521b\u5efa\u8ba2\u9605\u7ec4
\n break;
\n \/\/ \u5176\u4ed6\u4e8b\u4ef6\u7c7b\u578b…
\n}<\/p>\n
\u9ad8\u7ea7\u4e8b\u4ef6\u5904\u7406\u6a21\u5f0f\u7684\u5b9e\u73b0\u5f80\u5f80\u9700\u8981\u5bf9OPC DA\u670d\u52a1\u5668\u7684\u80fd\u529b\u6709\u6df1\u5165\u7684\u7406\u89e3，\u4ee5\u53ca\u5bf9\u5ba2\u6237\u7aef\u5e94\u7528\u7684\u590d\u6742\u9700\u6c42\u6709\u51c6\u786e\u7684\u628a\u63e1\u3002 <\/p>\n
\u4e8b\u4ef6\u9a71\u52a8\u7f16\u7a0b\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u7f16\u7a0b\u8303\u5f0f，\u5b83\u5141\u8bb8\u7a0b\u5e8f\u54cd\u5e94\u4e8b\u4ef6，\u800c\u65e0\u9700\u6301\u7eed\u8f6e\u8be2\u8d44\u6e90\u72b6\u6001\u3002\u5728OPC DA\u5e94\u7528\u4e2d，\u4e8b\u4ef6\u9a71\u52a8\u7f16\u7a0b\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u7cfb\u7edf\u6027\u80fd\u548c\u5b9e\u65f6\u6027\u3002 <\/p>\n
\u4e8b\u4ef6\u9a71\u52a8\u67b6\u6784\u7684\u4f18\u52bf\u5728\u4e8e\u5176\u9ad8\u6548\u7684\u54cd\u5e94\u673a\u5236\u548c\u4e8b\u4ef6\u5904\u7406\u7684\u89e3\u8026\u3002\u5728\u6570\u636e\u9891\u7e41\u66f4\u65b0\u7684\u573a\u666f\u4e2d，\u4f7f\u7528\u4e8b\u4ef6\u9a71\u52a8\u673a\u5236\u80fd\u591f\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u8d44\u6e90\u6d88\u8017，\u5e76\u63d0\u5347\u7a0b\u5e8f\u7684\u54cd\u5e94\u901f\u5ea6\u3002 <\/p>\n
\u6bd4\u5982，\u5728\u6570\u636e\u91c7\u96c6\u7cfb\u7edf\u4e2d，\u4e8b\u4ef6\u9a71\u52a8\u67b6\u6784\u53ef\u4ee5\u4f7f\u5ba2\u6237\u7aef\u53ea\u5728\u6570\u636e\u9879\u53d1\u751f\u53d8\u5316\u65f6\u624d\u8fdb\u884c\u5904\u7406，\u907f\u514d\u4e86\u56e0\u5b9a\u65f6\u8f6e\u8be2\u5bfc\u81f4\u7684CPU\u548c\u7f51\u7edc\u8d44\u6e90\u6d6a\u8d39\u3002\u6b64\u5916，\u4e8b\u4ef6\u9a71\u52a8\u67b6\u6784\u4e0b，\u4ee3\u7801\u66f4\u52a0\u6a21\u5757\u5316，\u6613\u4e8e\u7406\u89e3\u548c\u7ef4\u62a4\u3002 <\/p>\n
\u5b9e\u73b0\u9ad8\u6027\u80fd\u7684\u4e8b\u4ef6\u9a71\u52a8\u5e94\u7528\u9700\u8981\u5728\u4e8b\u4ef6\u8ba2\u9605\u3001\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\u8bbe\u8ba1\u4ee5\u53ca\u7cfb\u7edf\u67b6\u6784\u8bbe\u8ba1\u4e0a\u505a\u597d\u5de5\u4f5c\u3002\u4e8b\u4ef6\u8ba2\u9605\u5e94\u51c6\u786e\u5730\u6839\u636e\u4e1a\u52a1\u9700\u6c42\u8fdb\u884c\u914d\u7f6e，\u4e8b\u4ef6\u5904\u7406\u903b\u8f91\u8981\u5c3d\u91cf\u8f7b\u91cf，\u5e76\u4e14\u5e94\u8be5\u8bbe\u8ba1\u6709\u9002\u5f53\u7684\u9519\u8bef\u5904\u7406\u548c\u5f02\u5e38\u6355\u83b7\u673a\u5236，\u4ee5\u786e\u4fdd\u7cfb\u7edf\u7a33\u5b9a\u8fd0\u884c\u3002 <\/p>\n
\/\/ \u793a\u4f8b\u4ee3\u7801：\u5b9e\u73b0\u4e8b\u4ef6\u9a71\u52a8\u7684\u6570\u636e\u5904\u7406
\npublic void ProcessEvents()
\n{
\n \/\/ \u8be5\u65b9\u6cd5\u4e3a\u4e8b\u4ef6\u76d1\u542c\u5faa\u73af，\u5f53\u6709\u4e8b\u4ef6\u89e6\u53d1\u65f6，OPC\u670d\u52a1\u5668\u4f1a\u8c03\u7528\u56de\u8c03\u51fd\u6570
\n while (true)
\n {
\n \/\/ \u5728\u751f\u4ea7\u73af\u5883\u4e2d，\u8fd9\u4e2a\u5faa\u73af\u4f1a\u8fd0\u884c\u5728\u4e00\u4e2a\u5355\u72ec\u7684\u7ebf\u7a0b\u6216\u8005\u7ebf\u7a0b\u6c60\u4e2d
\n \/\/ \u5e76\u4e14\u4f1a\u6709\u4e00\u4e2a\u65b9\u6cd5\u6765\u4f18\u96c5\u5730\u5904\u7406\u4e2d\u65ad\u548c\u8d44\u6e90\u6e05\u7406
\n }
\n}<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u5c06\u4e8b\u4ef6\u9a71\u52a8\u7f16\u7a0b\u4e0e\u5176\u4ed6\u6280\u672f，\u4f8b\u5982\u5f02\u6b65\u7f16\u7a0b\u548c\u591a\u7ebf\u7a0b，\u76f8\u7ed3\u5408\u53ef\u4ee5\u8fdb\u4e00\u6b65\u63d0\u9ad8\u5e94\u7528\u7684\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u3002\u4f8b\u5982，\u5728.NET\u73af\u5883\u4e2d\u53ef\u4ee5\u5229\u7528 async \u548c await \u5173\u952e\u5b57，\u7f16\u5199\u5f02\u6b65\u4e8b\u4ef6\u5904\u7406\u65b9\u6cd5，\u4ee5\u907f\u514d\u963b\u585e\u4e3b\u7ebf\u7a0b\u3002 <\/p>\n
OPC DA\u7684\u6570\u636e\u8ba2\u9605\u4e0e\u4e8b\u4ef6\u5904\u7406\u673a\u5236\u4e3a\u5de5\u4e1a\u81ea\u52a8\u5316\u548c\u6570\u636e\u91c7\u96c6\u7cfb\u7edf\u63d0\u4f9b\u4e86\u5b9e\u65f6\u6027\u548c\u9ad8\u6548\u6027\u3002\u901a\u8fc7\u638c\u63e1\u8fd9\u4e9b\u673a\u5236，\u5f00\u53d1\u8005\u53ef\u4ee5\u6784\u5efa\u51fa\u66f4\u52a0\u7a33\u5b9a\u3001\u53ef\u6269\u5c55\u7684\u7cfb\u7edf\u3002\u672c\u7ae0\u4e2d，\u6211\u4eec\u8be6\u7ec6\u5206\u6790\u4e86\u6570\u636e\u8ba2\u9605\u7684\u540c\u6b65\u4e0e\u5f02\u6b65\u8fc7\u7a0b，\u4ee5\u53ca\u5982\u4f55\u5904\u7406\u6570\u636e\u66f4\u65b0\u4e8b\u4ef6\u3002\u540c\u65f6，\u6211\u4eec\u4e5f\u63a2\u8ba8\u4e86\u521b\u5efa\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u5904\u7406\u5668\u548c\u5b9e\u73b0\u9ad8\u6027\u80fd\u4e8b\u4ef6\u9a71\u52a8\u5e94\u7528\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u8fd9\u4e9b\u6280\u672f\u7684\u5e94\u7528，\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u5347\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u5b9e\u65f6\u6027，\u6ee1\u8db3\u5de5\u4e1a\u754c\u5bf9\u5b9e\u65f6\u6570\u636e\u76d1\u63a7\u7684\u9700\u6c42\u3002 <\/p>\n
\u5728\u7f16\u7a0b\u4e2d，\u5f02\u5e38（Exception）\u662f\u7a0b\u5e8f\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u9047\u5230\u7684\u975e\u6b63\u5e38\u60c5\u51b5，\u5b83\u4e2d\u65ad\u4e86\u6b63\u5e38\u7684\u7a0b\u5e8f\u6d41\u7a0b\u3002\u5728.NET\u6846\u67b6\u4e2d，\u6240\u6709\u7684\u5f02\u5e38\u90fd\u6d3e\u751f\u81ea System.Exception \u7c7b，\u53ef\u4ee5\u5206\u4e3a\u4e24\u5927\u7c7b：\u5df2\u68c0\u67e5\u5f02\u5e38（Checked Exceptions）\u548c\u672a\u68c0\u67e5\u5f02\u5e38（Unchecked Exceptions）\u3002 <\/p>\n
\u5df2\u68c0\u67e5\u5f02\u5e38 ：\u5728\u7f16\u8bd1\u65f6\u5fc5\u987b\u663e\u5f0f\u5904\u7406\u7684\u5f02\u5e38\u3002\u8fd9\u4e9b\u5f02\u5e38\u901a\u5e38\u7531\u5916\u90e8\u56e0\u7d20\u5f15\u8d77，\u6bd4\u5982\u6587\u4ef6\u8bfb\u5199\u5f02\u5e38（ IOException ）\u3001\u6570\u636e\u5e93\u8fde\u63a5\u5f02\u5e38（ SQLException ）\u7b49\u3002 <\/p>\n
\u672a\u68c0\u67e5\u5f02\u5e38 ：\u5728\u7f16\u8bd1\u65f6\u4e0d\u9700\u8981\u663e\u5f0f\u58f0\u660e\u6216\u5904\u7406\u7684\u5f02\u5e38，\u4e3b\u8981\u5305\u62ec\u8fd0\u884c\u65f6\u5f02\u5e38（ RuntimeException ）\u53ca\u5176\u6d3e\u751f\u7c7b，\u4f8b\u5982 NullReferenceException （\u7a7a\u5f15\u7528\u5f02\u5e38）\u548c IndexOutOfRangeException （\u7d22\u5f15\u8d85\u51fa\u8303\u56f4\u5f02\u5e38）\u3002 <\/p>\n
\u5f02\u5e38\u5177\u6709\u4e24\u4e2a\u91cd\u8981\u7684\u7279\u6027：\u7c7b\u578b\u548c\u5806\u6808\u8ffd\u8e2a\u4fe1\u606f\u3002\u5f02\u5e38\u7c7b\u578b\u53ef\u4ee5\u544a\u8bc9\u6211\u4eec\u5f02\u5e38\u7684\u6027\u8d28，\u5806\u6808\u8ffd\u8e2a\u4fe1\u606f\u5219\u663e\u793a\u4e86\u5f02\u5e38\u53d1\u751f\u65f6\u7684\u8c03\u7528\u5806\u6808，\u8fd9\u5bf9\u4e8e\u8c03\u8bd5\u548c\u786e\u5b9a\u5f02\u5e38\u539f\u56e0\u81f3\u5173\u91cd\u8981\u3002 <\/p>\n
\u7f16\u5199\u5065\u58ee\u7684\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u59a5\u5584\u5904\u7406\u5404\u79cd\u5f02\u5e38\u60c5\u51b5\u3002\u4ee5\u4e0b\u662f\u51e0\u4e2a\u5f02\u5e38\u5904\u7406\u7684\u57fa\u672c\u539f\u5219： <\/p>\n
\u4e3a\u4e86\u907f\u514d\u91cd\u590d\u7684\u9519\u8bef\u5904\u7406\u4ee3\u7801\u548c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027，\u6211\u4eec\u5e94\u8be5\u7f16\u5199\u53ef\u91cd\u7528\u7684\u5f02\u5e38\u5904\u7406\u5668\u3002\u5728C#\u4e2d，\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\u7c7b\u548c\u5f02\u5e38\u8fc7\u6ee4\u5668\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002 <\/p>\n
\u4f8b\u5982，\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u5904\u7406\u6570\u636e\u5e93\u64cd\u4f5c\u5931\u8d25\u7684\u81ea\u5b9a\u4e49\u5f02\u5e38\u7c7b： <\/p>\n
public class DatabaseException : Exception
\n{
\n public DatabaseException(string message) : base(message) { }
\n \/\/ \u8fd8\u53ef\u4ee5\u6dfb\u52a0\u66f4\u591a\u7279\u5b9a\u7684\u5c5e\u6027\u548c\u65b9\u6cd5
\n}<\/p>\n
\u5f02\u5e38\u8fc7\u6ee4\u5668（Exception Filters）\u662f\u5728C# 6.0\u4e2d\u5f15\u5165\u7684\u4e00\u4e2a\u7279\u6027，\u5b83\u5141\u8bb8\u6211\u4eec\u5728 catch \u8bed\u53e5\u4e2d\u4f7f\u7528\u4e00\u4e2a\u6761\u4ef6\u8868\u8fbe\u5f0f，\u53ea\u6709\u5f53\u8be5\u8868\u8fbe\u5f0f\u4e3a\u771f\u65f6，\u624d\u4f1a\u5904\u7406\u5f02\u5e38： <\/p>\n
try
\n{
\n \/\/ \u5c1d\u8bd5\u6267\u884c\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801
\n}
\ncatch (Exception ex) when (ex is DatabaseException)
\n{
\n \/\/ \u4ec5\u5f53\u5f02\u5e38\u662fDatabaseException\u7c7b\u578b\u65f6，\u624d\u6267\u884c\u8fd9\u91cc\u7684\u4ee3\u7801
\n}<\/p>\n
\u8bb0\u5f55\u5f02\u5e38\u65e5\u5fd7\u662f\u5728\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u5b9a\u4f4d\u95ee\u9898\u548c\u6027\u80fd\u76d1\u63a7\u7684\u91cd\u8981\u624b\u6bb5\u3002\u4f7f\u7528\u65e5\u5fd7\u6846\u67b6\u5982log4net\u6216NLog\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u66f4\u7cfb\u7edf\u5730\u8bb0\u5f55\u5f02\u5e38\u4fe1\u606f\u3002 <\/p>\n
try
\n{
\n \/\/ \u5c1d\u8bd5\u6267\u884c\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801
\n}
\ncatch (Exception ex)
\n{
\n \/\/ \u8bb0\u5f55\u5f02\u5e38\u4fe1\u606f\u5230\u6587\u4ef6\u6216\u65e5\u5fd7\u7cfb\u7edf
\n Log.Error("\u8bb0\u5f55\u9519\u8bef：", ex);
\n}<\/p>\n
\u81ea\u5b9a\u4e49\u5f02\u5e38\u5141\u8bb8\u6211\u4eec\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u63d0\u4f9b\u66f4\u5177\u4f53\u7684\u9519\u8bef\u5904\u7406\u3002\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\u7c7b\u5e76\u91cd\u5199\u57fa\u7c7b\u7684\u6784\u9020\u5668\u6765\u5b9e\u73b0\u6b64\u76ee\u7684\u3002 <\/p>\n
public class CustomParseException : Exception
\n{
\n public int LineNumber { get; set; }<\/p>\n
public CustomParseException(string message, int lineNumber) : base(message)
\n {
\n LineNumber = lineNumber;
\n }
\n}<\/p>\n
\u5f53\u6d89\u53ca\u5230\u9700\u8981\u4fdd\u8bc1\u6570\u636e\u4e00\u81f4\u6027\u65f6，\u5f02\u5e38\u56de\u6eda\u4e0e\u4e8b\u52a1\u5904\u7406\u663e\u5f97\u5c24\u4e3a\u91cd\u8981\u3002.NET\u63d0\u4f9b\u4e86 System.Transactions \u547d\u540d\u7a7a\u95f4\u6765\u5e2e\u52a9\u5f00\u53d1\u8005\u8fdb\u884c\u4e8b\u52a1\u63a7\u5236\u3002 <\/p>\n
using System.Transactions;<\/p>\n
public void ExecuteTransaction()
\n{
\n using (var scope = new TransactionScope())
\n {
\n try
\n {
\n \/\/ \u4e1a\u52a1\u4ee3\u7801，\u5982\u6570\u636e\u5e93\u64cd\u4f5c\u7b49
\n scope.Complete(); \/\/ \u5fc5\u987b\u8c03\u7528\u6b64\u65b9\u6cd5\u4ee5\u63d0\u4ea4\u4e8b\u52a1
\n }
\n catch (Exception ex)
\n {
\n \/\/ \u5982\u679c\u53d1\u751f\u5f02\u5e38，\u4e0d\u8c03\u7528scope.Complete()，\u4e8b\u52a1\u5c06\u81ea\u52a8\u56de\u6eda
\n Log.Error("\u4e8b\u52a1\u56de\u6eda：", ex);
\n }
\n }
\n}<\/p>\n
\u8fd9\u4e9b\u4ee3\u7801\u5757\u3001\u793a\u4f8b\u548c\u64cd\u4f5c\u6b65\u9aa4\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u5904\u7406\u5f02\u5e38，\u4ece\u57fa\u672c\u7684\u5206\u7c7b\u548c\u5904\u7406\u539f\u5219，\u5230\u9ad8\u7ea7\u7684\u81ea\u5b9a\u4e49\u5f02\u5e38\u548c\u4e8b\u52a1\u63a7\u5236\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f，\u6211\u4eec\u53ef\u4ee5\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u5728\u9047\u5230\u9519\u8bef\u65f6，\u80fd\u591f\u63d0\u4f9b\u6e05\u6670\u7684\u53cd\u9988，\u5e76\u4e14\u4fdd\u6301\u7cfb\u7edf\u7684\u7a33\u5b9a\u548c\u6570\u636e\u7684\u4e00\u81f4\u6027\u3002 <\/p>\n
\u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 <\/p>\n
\u7b80\u4ecb：OPC DA (Data Access)\u662fOPC\u89c4\u8303\u7684\u4e00\u90e8\u5206，\u7528\u4e8e\u5b9e\u65f6\u6570\u636e\u8bbf\u95ee，\u4f7f\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u95f4\u7684\u6570\u636e\u4ea4\u6362\u53d8\u5f97\u7b80\u5355\u3002C#\u7248\u672c\u7684OPC DA\u6e90\u7801\u901a\u5e38\u5b9e\u73b0\u4e3a\u5ba2\u6237\u7aef\u6216\u670d\u52a1\u5668，\u4fbf\u4e8e\u5f00\u53d1\u4e0e\u81ea\u52a8\u5316\u8bbe\u5907\u901a\u4fe1\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u672c\u9879\u76ee\u6df1\u5165\u63a2\u8ba8\u4e86C#\u5b9e\u73b0OPC DA\u7684\u5173\u952e\u6280\u672f\u8981\u70b9，\u5305\u62ecOPC Foundation Libraries\u7684\u4f7f\u7528\u3001COM Interop\u6280\u672f\u3001OPC Group\u548cItems\u7684\u64cd\u4f5c\u3001\u8fde\u63a5\u4e0e\u65ad\u5f00\u670d\u52a1\u5668\u3001\u6570\u636e\u8ba2\u9605\u4e0e\u4e8b\u4ef6\u5904\u7406\u3001\u5f02\u5e38\u5904\u7406\u3001\u591a\u7ebf\u7a0b\u7f16\u7a0b\u3001OPC UA\u7684\u57fa\u672c\u6982\u5ff5\u548c\u67b6\u6784\u3001\u8c03\u8bd5\u4e0e\u6d4b\u8bd5\u4ee5\u53ca\u8bbe\u8ba1\u6a21\u5f0f\u548c\u6700\u4f73\u5b9e\u8df5\u7684\u5e94\u7528\u3002\u901a\u8fc7\u672c\u9879\u76ee\u7684\u5b66\u4e60\u548c\u5b9e\u8df5，\u5f00\u53d1\u8005\u5c06\u80fd\u591f\u638c\u63e1\u6784\u5efa\u9ad8\u6548\u81ea\u52a8\u5316\u7cfb\u7edf\u4ea4\u4e92\u5e94\u7528\u7a0b\u5e8f\u7684\u5173\u952e\u6280\u80fd\u3002 <\/p>\n
\u672c\u6587\u8fd8\u6709\u914d\u5957\u7684\u7cbe\u54c1\u8d44\u6e90，\u70b9\u51fb\u83b7\u53d6 <\/p><\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb742\u6b21\uff0c\u70b9\u8d5e11\u6b21\uff0c\u6536\u85cf10\u6b21\u3002\u968f\u7740\u5de5\u4e1a\u81ea\u52a8\u5316\u9886\u57df\u7684\u53d1\u5c55\uff0c\u8bbe\u5907\u95f4\u7684\u4e92\u64cd\u4f5c\u6027\u53d8\u5f97\u8d8a\u6765\u8d8a\u91cd\u8981\u3002OPC (OLE for Process Control) \u6280\u672f\u5e94\u8fd0\u800c\u751f\uff0c\u5b83\u662f\u4e00\u79cd\u8de8\u5e73\u53f0\u3001\u72ec\u7acb\u4e8e\u8bbe\u5907\u548c\u5236\u9020\u5546\u7684\u5de5\u4e1a\u901a\u4fe1\u534f\u8bae\u3002\u65e8\u5728\u4e3a\u4e0d\u540c\u5382\u5546\u7684\u63a7\u5236\u7cfb\u7edf\u63d0\u4f9b\u7edf\u4e00\u7684\u6570\u636e\u8bbf\u95ee\u63a5\u53e3\u3002OPC\u901a\u8fc7\u5c06\u5de5\u4e1a\u786c\u4ef6\u62bd\u8c61\u4e3a\u6807\u51c6\u7684COM\u63a5\u53e3\uff0c\u4f7f\u5f97\u5e94\u7528\u7a0b\u5e8f\u80fd\u591f\u9ad8\u6548\u5730\u4ece\u73b0\u573a\u8bbe\u5907\u4e2d\u8bfb\u53d6\u6570\u636e\uff0c\u540c\u65f6\u907f\u514d\u4e86\u9488\u5bf9\u7279\u5b9a\u786c\u4ef6\u8fdb\u884c\u4ee3\u7801\u7f16\u5199\u7684\u95ee\u9898\u3002OPC Foundation\u5e93\u662fOPC DA\u6807\u51c6\u5b9e\u73b0\u7684\u57fa\u7840\uff0c\u5b83\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u8bbf\u95ee\u548c\u63a7\u5236OPC\u670d\u52a1\u5668\u7684\u80fd\u529b\u3002<\/p>\n","protected":false},"author":2,"featured_media":44131,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topic":[],"class_list":["post-44132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server"],"yoast_head":"\n