{"id":48094,"date":"2025-07-30T10:43:41","date_gmt":"2025-07-30T02:43:41","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/48094.html"},"modified":"2025-07-30T10:43:41","modified_gmt":"2025-07-30T02:43:41","slug":"%e4%bd%bf%e7%94%a8opcuahelper%e5%9c%a8c-winforms%e4%b8%ad%e8%bf%9e%e6%8e%a5opc-ua%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%b9%b6%e8%af%bb%e5%8f%96%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/48094.html","title":{"rendered":"\u4f7f\u7528OpcUaHelper\u5728C# WinForms\u4e2d\u8fde\u63a5OPC UA\u670d\u52a1\u5668\u5e76\u8bfb\u53d6\u6570\u636e"},"content":{"rendered":"<h2>\u4f7f\u7528OpcUaHelper\u5728C# WinForms\u4e2d\u8fde\u63a5OPC UA\u670d\u52a1\u5668\u5e76\u8bfb\u53d6\u6570\u636e<\/h2>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u793a\u4f8b&#xff0c;\u5c55\u793a\u5982\u4f55\u4f7f\u7528OpcUaHelper\u5e93\u5728C# WinForms\u5e94\u7528\u7a0b\u5e8f\u4e2d\u8fde\u63a5OPC UA\u670d\u52a1\u5668\u5e76\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n<h3>1. \u51c6\u5907\u5de5\u4f5c<\/h3>\n<p>\u9996\u5148&#xff0c;\u786e\u4fdd\u4f60\u5df2\u7ecf\u5b89\u88c5\u4e86OpcUaHelper NuGet\u5305\u3002\u53ef\u4ee5\u901a\u8fc7NuGet\u5305\u7ba1\u7406\u5668\u63a7\u5236\u53f0\u5b89\u88c5&#xff1a;<\/p>\n<p>Install-Package OpcUaHelper<\/p>\n<h3>2. \u521b\u5efaWinForms\u5e94\u7528\u7a0b\u5e8f<\/h3>\n<h4>2.1 \u8bbe\u8ba1\u754c\u9762<\/h4>\n<p>\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684WinForms\u7a97\u4f53&#xff0c;\u5305\u542b\u4ee5\u4e0b\u63a7\u4ef6&#xff1a;<\/p>\n<ul>\n<li>\u6587\u672c\u6846&#xff1a;\u7528\u4e8e\u8f93\u5165\u670d\u52a1\u5668URL<\/li>\n<li>\u8fde\u63a5\/\u65ad\u5f00\u6309\u94ae<\/li>\n<li>\u8282\u70b9ID\u6587\u672c\u6846<\/li>\n<li>\u8bfb\u53d6\u6309\u94ae<\/li>\n<li>\u6570\u636e\u663e\u793a\u533a\u57df&#xff08;\u5982DataGridView\u6216ListBox&#xff09;<\/li>\n<\/ul>\n<h4>2.2 \u5b8c\u6574\u4ee3\u7801\u793a\u4f8b<\/h4>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token namespace\">OpcUaHelper<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">using<\/span> <span class=\"token namespace\">System<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">using<\/span> <span class=\"token namespace\">System<span class=\"token punctuation\">.<\/span>Collections<span class=\"token punctuation\">.<\/span>Generic<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">using<\/span> <span class=\"token namespace\">System<span class=\"token punctuation\">.<\/span>Windows<span class=\"token punctuation\">.<\/span>Forms<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token keyword\">namespace<\/span> <span class=\"token namespace\">OpcUaWinFormsClient<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">partial<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">MainForm<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token type-list\"><span class=\"token class-name\">Form<\/span><\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">private<\/span> <span class=\"token class-name\">OpcUaClient<\/span> opcUaClient <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">OpcUaClient<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">private<\/span> <span class=\"token class-name\"><span class=\"token keyword\">bool<\/span><\/span> isConnected <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token keyword\">public<\/span> <span class=\"token function\">MainForm<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">InitializeComponent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">UpdateUiState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">btnConnect_Click<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">object<\/span><\/span> sender<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">EventArgs<\/span> e<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>isConnected<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">ConnectToServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">else<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">DisconnectFromServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">ConnectToServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">string<\/span><\/span> serverUrl <span class=\"token operator\">&#061;<\/span> txtServerUrl<span class=\"token punctuation\">.<\/span>Text<span class=\"token punctuation\">.<\/span><span class=\"token function\">Trim<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">string<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">IsNullOrEmpty<\/span><span class=\"token punctuation\">(<\/span>serverUrl<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                MessageBox<span class=\"token punctuation\">.<\/span><span class=\"token function\">Show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u6709\u6548\u7684\u670d\u52a1\u5668URL&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><\/p>\n<p>            <span class=\"token keyword\">try<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                btnConnect<span class=\"token punctuation\">.<\/span>Enabled <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                lblStatus<span class=\"token punctuation\">.<\/span>Text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u6b63\u5728\u8fde\u63a5&#8230;&#034;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                <span class=\"token comment\">\/\/ \u8fde\u63a5\u5230\u670d\u52a1\u5668<\/span><br \/>\n                <span class=\"token keyword\">await<\/span> opcUaClient<span class=\"token punctuation\">.<\/span><span class=\"token function\">ConnectServerAsync<\/span><span class=\"token punctuation\">(<\/span>serverUrl<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                isConnected <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                lblStatus<span class=\"token punctuation\">.<\/span>Text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u5df2\u8fde\u63a5&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                MessageBox<span class=\"token punctuation\">.<\/span><span class=\"token function\">Show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8fde\u63a5\u6210\u529f!&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> ex<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                lblStatus<span class=\"token punctuation\">.<\/span>Text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u8fde\u63a5\u5931\u8d25&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                MessageBox<span class=\"token punctuation\">.<\/span><span class=\"token function\">Show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;\u8fde\u63a5\u5931\u8d25: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">ex<span class=\"token punctuation\">.<\/span>Message<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">finally<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                btnConnect<span class=\"token punctuation\">.<\/span>Enabled <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token function\">UpdateUiState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">DisconnectFromServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">try<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                opcUaClient<span class=\"token punctuation\">.<\/span><span class=\"token function\">Disconnect<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                isConnected <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                lblStatus<span class=\"token punctuation\">.<\/span>Text <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\u5df2\u65ad\u5f00&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> ex<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                MessageBox<span class=\"token punctuation\">.<\/span><span class=\"token function\">Show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;\u65ad\u5f00\u8fde\u63a5\u65f6\u51fa\u9519: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">ex<span class=\"token punctuation\">.<\/span>Message<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">finally<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">UpdateUiState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">UpdateUiState<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            btnConnect<span class=\"token punctuation\">.<\/span>Text <span class=\"token operator\">&#061;<\/span> isConnected <span class=\"token punctuation\">?<\/span> <span class=\"token string\">&#034;\u65ad\u5f00\u8fde\u63a5&#034;<\/span> <span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;\u8fde\u63a5&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            btnRead<span class=\"token punctuation\">.<\/span>Enabled <span class=\"token operator\">&#061;<\/span> isConnected<span class=\"token punctuation\">;<\/span><br \/>\n            txtNodeId<span class=\"token punctuation\">.<\/span>Enabled <span class=\"token operator\">&#061;<\/span> isConnected<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">btnRead_Click<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">object<\/span><\/span> sender<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">EventArgs<\/span> e<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">string<\/span><\/span> nodeId <span class=\"token operator\">&#061;<\/span> txtNodeId<span class=\"token punctuation\">.<\/span>Text<span class=\"token punctuation\">.<\/span><span class=\"token function\">Trim<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">string<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">IsNullOrEmpty<\/span><span class=\"token punctuation\">(<\/span>nodeId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                MessageBox<span class=\"token punctuation\">.<\/span><span class=\"token function\">Show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8bf7\u8f93\u5165\u8282\u70b9ID&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token keyword\">return<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><\/p>\n<p>            <span class=\"token keyword\">try<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                btnRead<span class=\"token punctuation\">.<\/span>Enabled <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">false<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                <span class=\"token comment\">\/\/ \u8bfb\u53d6\u5355\u4e2a\u8282\u70b9\u503c<\/span><br \/>\n                <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> <span class=\"token keyword\">value<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> opcUaClient<span class=\"token punctuation\">.<\/span><span class=\"token function\">ReadNodeAsync<\/span><span class=\"token punctuation\">(<\/span>nodeId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                <span class=\"token comment\">\/\/ \u663e\u793a\u8bfb\u53d6\u7ed3\u679c<\/span><br \/>\n                lstResults<span class=\"token punctuation\">.<\/span>Items<span class=\"token punctuation\">.<\/span><span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;\u8282\u70b9: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">nodeId<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, \u503c: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\"><span class=\"token keyword\">value<\/span><\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, \u7c7b\u578b: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\"><span class=\"token keyword\">value<\/span><span class=\"token punctuation\">?.<\/span><span class=\"token function\">GetType<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                lstResults<span class=\"token punctuation\">.<\/span>TopIndex <span class=\"token operator\">&#061;<\/span> lstResults<span class=\"token punctuation\">.<\/span>Items<span class=\"token punctuation\">.<\/span>Count <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> ex<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                MessageBox<span class=\"token punctuation\">.<\/span><span class=\"token function\">Show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;\u8bfb\u53d6\u6570\u636e\u65f6\u51fa\u9519: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">ex<span class=\"token punctuation\">.<\/span>Message<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">finally<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                btnRead<span class=\"token punctuation\">.<\/span>Enabled <span class=\"token operator\">&#061;<\/span> <span class=\"token boolean\">true<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">btnBrowse_Click<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">object<\/span><\/span> sender<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">EventArgs<\/span> e<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">try<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                treeNodes<span class=\"token punctuation\">.<\/span>Nodes<span class=\"token punctuation\">.<\/span><span class=\"token function\">Clear<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> rootNode <span class=\"token operator\">&#061;<\/span> treeNodes<span class=\"token punctuation\">.<\/span>Nodes<span class=\"token punctuation\">.<\/span><span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Root&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                <span class=\"token comment\">\/\/ \u6d4f\u89c8\u670d\u52a1\u5668\u8282\u70b9<\/span><br \/>\n                <span class=\"token keyword\">await<\/span> <span class=\"token function\">BrowseNodeAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;i&#061;84&#034;<\/span><span class=\"token punctuation\">,<\/span> rootNode<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ Objects\u6587\u4ef6\u5939\u901a\u5e38\u662fi&#061;84<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> ex<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                MessageBox<span class=\"token punctuation\">.<\/span><span class=\"token function\">Show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;\u6d4f\u89c8\u8282\u70b9\u65f6\u51fa\u9519: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">ex<span class=\"token punctuation\">.<\/span>Message<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\">Task<\/span> <span class=\"token function\">BrowseNodeAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">string<\/span><\/span> nodeId<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">TreeNode<\/span> parentTreeNode<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> references <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">await<\/span> opcUaClient<span class=\"token punctuation\">.<\/span><span class=\"token function\">BrowseNodeReferenceAsync<\/span><span class=\"token punctuation\">(<\/span>nodeId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">foreach<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> reference <span class=\"token keyword\">in<\/span> references<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> childNode <span class=\"token operator\">&#061;<\/span> parentTreeNode<span class=\"token punctuation\">.<\/span>Nodes<span class=\"token punctuation\">.<\/span><span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">reference<span class=\"token punctuation\">.<\/span>DisplayName<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\"> (<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">reference<span class=\"token punctuation\">.<\/span>NodeId<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">)&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                <span class=\"token comment\">\/\/ \u5982\u679c\u662f\u6587\u4ef6\u5939\/\u5bf9\u8c61\u7c7b\u578b&#xff0c;\u6dfb\u52a0\u4e00\u4e2a\u865a\u62df\u5b50\u8282\u70b9\u4ee5\u4fbf\u5c55\u5f00<\/span><br \/>\n                <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>reference<span class=\"token punctuation\">.<\/span>NodeClass <span class=\"token operator\">&#061;&#061;<\/span> Opc<span class=\"token punctuation\">.<\/span>Ua<span class=\"token punctuation\">.<\/span>NodeClass<span class=\"token punctuation\">.<\/span>Object <span class=\"token operator\">||<\/span><br \/>\n                    reference<span class=\"token punctuation\">.<\/span>NodeClass <span class=\"token operator\">&#061;&#061;<\/span> Opc<span class=\"token punctuation\">.<\/span>Ua<span class=\"token punctuation\">.<\/span>NodeClass<span class=\"token punctuation\">.<\/span>Variable<span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    childNode<span class=\"token punctuation\">.<\/span>Nodes<span class=\"token punctuation\">.<\/span><span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u52a0\u8f7d\u4e2d&#8230;&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token keyword\">async<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">treeNodes_BeforeExpand<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">object<\/span><\/span> sender<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">TreeViewCancelEventArgs<\/span> e<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> node <span class=\"token operator\">&#061;<\/span> e<span class=\"token punctuation\">.<\/span>Node<span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token comment\">\/\/ \u5982\u679c\u53ea\u6709\u4e00\u4e2a&#034;\u52a0\u8f7d\u4e2d&#8230;&#034;\u5b50\u8282\u70b9&#xff0c;\u5219\u5b9e\u9645\u52a0\u8f7d\u5b50\u8282\u70b9<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>node<span class=\"token punctuation\">.<\/span>Nodes<span class=\"token punctuation\">.<\/span>Count <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">1<\/span> <span class=\"token operator\">&amp;&amp;<\/span> node<span class=\"token punctuation\">.<\/span>Nodes<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">.<\/span>Text <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token string\">&#034;\u52a0\u8f7d\u4e2d&#8230;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">try<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    node<span class=\"token punctuation\">.<\/span>Nodes<span class=\"token punctuation\">.<\/span><span class=\"token function\">Clear<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                    <span class=\"token comment\">\/\/ \u4ece\u8282\u70b9\u6587\u672c\u4e2d\u63d0\u53d6NodeId<\/span><br \/>\n                    <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> nodeId <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">ExtractNodeIdFromTreeNode<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>                    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span><span class=\"token keyword\">string<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">IsNullOrEmpty<\/span><span class=\"token punctuation\">(<\/span>nodeId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n                    <span class=\"token punctuation\">{<\/span><br \/>\n                        <span class=\"token keyword\">await<\/span> <span class=\"token function\">BrowseNodeAsync<\/span><span class=\"token punctuation\">(<\/span>nodeId<span class=\"token punctuation\">,<\/span> node<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n                <span class=\"token keyword\">catch<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Exception<\/span> ex<span class=\"token punctuation\">)<\/span><br \/>\n                <span class=\"token punctuation\">{<\/span><br \/>\n                    MessageBox<span class=\"token punctuation\">.<\/span><span class=\"token function\">Show<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;\u52a0\u8f7d\u5b50\u8282\u70b9\u65f6\u51fa\u9519: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">ex<span class=\"token punctuation\">.<\/span>Message<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                    node<span class=\"token punctuation\">.<\/span>Nodes<span class=\"token punctuation\">.<\/span><span class=\"token function\">Add<\/span><span class=\"token punctuation\">(<\/span><span class=\"token interpolation-string\"><span class=\"token string\">$&#034;\u9519\u8bef: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span><span class=\"token expression language-csharp\">ex<span class=\"token punctuation\">.<\/span>Message<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n                <span class=\"token punctuation\">}<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">string<\/span><\/span> <span class=\"token function\">ExtractNodeIdFromTreeNode<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">TreeNode<\/span> node<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u4ece\u7c7b\u4f3c &#034;DisplayName (ns&#061;2;s&#061;MyVariable)&#034; \u7684\u6587\u672c\u4e2d\u63d0\u53d6 &#034;ns&#061;2;s&#061;MyVariable&#034;<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> text <span class=\"token operator\">&#061;<\/span> node<span class=\"token punctuation\">.<\/span>Text<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> start <span class=\"token operator\">&#061;<\/span> text<span class=\"token punctuation\">.<\/span><span class=\"token function\">IndexOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token char\">&#039;(&#039;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> end <span class=\"token operator\">&#061;<\/span> text<span class=\"token punctuation\">.<\/span><span class=\"token function\">IndexOf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token char\">&#039;)&#039;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>start <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span> <span class=\"token operator\">&amp;&amp;<\/span> end <span class=\"token operator\">&gt;<\/span> start<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token keyword\">return<\/span> text<span class=\"token punctuation\">.<\/span><span class=\"token function\">Substring<\/span><span class=\"token punctuation\">(<\/span>start<span class=\"token punctuation\">,<\/span> end <span class=\"token operator\">&#8211;<\/span> start<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><\/p>\n<p>            <span class=\"token keyword\">return<\/span> <span class=\"token keyword\">null<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token keyword\">private<\/span> <span class=\"token return-type class-name\"><span class=\"token keyword\">void<\/span><\/span> <span class=\"token function\">MainForm_FormClosing<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\"><span class=\"token keyword\">object<\/span><\/span> sender<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">FormClosingEventArgs<\/span> e<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>isConnected<span class=\"token punctuation\">)<\/span><br \/>\n            <span class=\"token punctuation\">{<\/span><br \/>\n                <span class=\"token function\">DisconnectFromServer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token punctuation\">}<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h3>3. \u529f\u80fd\u8bf4\u660e<\/h3>\n<li>\n<p>\u8fde\u63a5\/\u65ad\u5f00\u670d\u52a1\u5668&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528ConnectServerAsync\u65b9\u6cd5\u5f02\u6b65\u8fde\u63a5<\/li>\n<li>\u4f7f\u7528Disconnect\u65b9\u6cd5\u65ad\u5f00\u8fde\u63a5<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u8bfb\u53d6\u8282\u70b9\u6570\u636e&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528ReadNodeAsync\u65b9\u6cd5\u8bfb\u53d6\u5355\u4e2a\u8282\u70b9\u503c<\/li>\n<li>\u652f\u6301\u6240\u6709OPC UA\u6570\u636e\u7c7b\u578b<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6d4f\u89c8\u670d\u52a1\u5668\u8282\u70b9&#xff1a;<\/p>\n<ul>\n<li>\u4f7f\u7528BrowseNodeReferenceAsync\u65b9\u6cd5\u6d4f\u89c8\u8282\u70b9\u5f15\u7528<\/li>\n<li>\u5b9e\u73b0\u6811\u5f62\u89c6\u56fe\u7684\u5ef6\u8fdf\u52a0\u8f7d<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u9519\u8bef\u5904\u7406&#xff1a;<\/p>\n<ul>\n<li>\u5bf9\u6240\u6709OPC UA\u64cd\u4f5c\u8fdb\u884c\u9002\u5f53\u7684\u9519\u8bef\u5904\u7406<\/li>\n<\/ul>\n<\/li>\n<h3>4. \u6269\u5c55\u529f\u80fd<\/h3>\n<p>\u4f60\u53ef\u4ee5\u6839\u636e\u9700\u8981\u6269\u5c55\u6b64\u793a\u4f8b&#xff0c;\u6dfb\u52a0\u4ee5\u4e0b\u529f\u80fd&#xff1a;<\/p>\n<li>\n<p>\u5199\u5165\u6570\u636e&#xff1a;<\/p>\n<p><span class=\"token keyword\">await<\/span> opcUaClient<span class=\"token punctuation\">.<\/span><span class=\"token function\">WriteNodeAsync<\/span><span class=\"token punctuation\">(<\/span>nodeId<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">value<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<\/li>\n<li>\n<p>\u8ba2\u9605\u6570\u636e\u53d8\u5316&#xff1a;<\/p>\n<p><span class=\"token comment\">\/\/ \u521b\u5efa\u8ba2\u9605<\/span><br \/>\n<span class=\"token class-name\"><span class=\"token keyword\">var<\/span><\/span> subscription <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token constructor-invocation class-name\">OpcUaHelper<span class=\"token punctuation\">.<\/span>Subscription<\/span><span class=\"token punctuation\">(<\/span>opcUaClient<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6dfb\u52a0\u76d1\u63a7\u9879<\/span><br \/>\nsubscription<span class=\"token punctuation\">.<\/span><span class=\"token function\">AddItem<\/span><span class=\"token punctuation\">(<\/span>nodeId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6570\u636e\u53d8\u5316\u4e8b\u4ef6<\/span><br \/>\nsubscription<span class=\"token punctuation\">.<\/span>DataChangeReceived <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token punctuation\">(<\/span>s<span class=\"token punctuation\">,<\/span> e<span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&gt;<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u5904\u7406\u6570\u636e\u53d8\u5316<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u542f\u52a8\u8ba2\u9605<\/span><br \/>\n<span class=\"token keyword\">await<\/span> subscription<span class=\"token punctuation\">.<\/span><span class=\"token function\">ApplyAsync<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span 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