{"id":66471,"date":"2026-01-26T20:41:34","date_gmt":"2026-01-26T12:41:34","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/66471.html"},"modified":"2026-01-26T20:41:34","modified_gmt":"2026-01-26T12:41:34","slug":"c%e4%b8%ad%e7%9a%84linq%ef%bc%9a%e7%ae%80%e5%8c%96%e6%95%b0%e6%8d%ae%e6%9f%a5%e8%af%a2%e4%b8%8e%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/66471.html","title":{"rendered":"C#\u4e2d\u7684LINQ\uff1a\u7b80\u5316\u6570\u636e\u67e5\u8be2\u4e0e\u64cd\u4f5c"},"content":{"rendered":"<p>\u5f15\u8a00<\/p>\n<p>\u5728\u73b0\u4ee3\u8f6f\u4ef6\u5f00\u53d1\u4e2d&#xff0c;\u5904\u7406\u548c\u64cd\u4f5c\u6570\u636e\u662f\u4e0d\u53ef\u907f\u514d\u7684\u4efb\u52a1\u3002\u65e0\u8bba\u662f\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\u4fe1\u606f&#xff0c;\u8fd8\u662f\u5bf9\u5185\u5b58\u4e2d\u7684\u96c6\u5408\u8fdb\u884c\u7b5b\u9009\u3001\u6392\u5e8f\u7b49\u64cd\u4f5c&#xff0c;\u5f00\u53d1\u8005\u90fd\u9700\u8981\u4e00\u79cd\u9ad8\u6548\u4e14\u6613\u4e8e\u4f7f\u7528\u7684\u65b9\u6cd5\u3002C#\u4e2d\u7684LINQ&#xff08;Language Integrated Query&#xff09;\u6b63\u662f\u4e3a\u6b64\u800c\u751f&#xff0c;\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7edf\u4e00\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u6570\u636e\u67e5\u8be2\u548c\u64cd\u4f5c&#xff0c;\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u6613\u8bfb\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8LINQ\u7684\u57fa\u7840\u77e5\u8bc6\u53ca\u5176\u5e94\u7528\u573a\u666f\u3002<\/p>\n<p>LINQ\u7b80\u4ecb<\/p>\n<p>LINQ\u662f\u5728.NET Framework 3.5\u4e2d\u5f15\u5165\u7684&#xff0c;\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u4ee5\u58f0\u660e\u5f0f\u7684\u65b9\u5f0f\u7f16\u5199\u67e5\u8be2&#xff0c;\u8fd9\u4e9b\u67e5\u8be2\u53ef\u4ee5\u5e94\u7528\u4e8e\u591a\u79cd\u6570\u636e\u6e90&#xff0c;\u5982\u6570\u7ec4\u3001\u5217\u8868\u3001XML\u6587\u6863\u4ee5\u53ca\u6570\u636e\u5e93\u7b49\u3002LINQ\u7684\u6838\u5fc3\u601d\u60f3\u662f\u5c06\u67e5\u8be2\u64cd\u4f5c\u76f4\u63a5\u96c6\u6210\u5230\u8bed\u8a00\u8bed\u6cd5\u4e2d&#xff0c;\u4ece\u800c\u51cf\u5c11\u4e86\u6837\u677f\u4ee3\u7801&#xff0c;\u5e76\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\u3002<\/p>\n<p>\u57fa\u7840\u793a\u4f8b<\/p>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u6574\u6570\u5217\u8868&#xff0c;\u60f3\u8981\u627e\u51fa\u5176\u4e2d\u5927\u4e8e10\u7684\u6240\u6709\u5076\u6570&#xff0c;\u5e76\u6309\u5347\u5e8f\u6392\u5217\u3002\u4f7f\u7528\u4f20\u7edf\u7684\u5faa\u73af\u7ed3\u6784\u5b9e\u73b0\u8d77\u6765\u53ef\u80fd\u4f1a\u6bd4\u8f83\u7e41\u7410&#xff0c;\u4f46\u662f\u501f\u52a9LINQ&#xff0c;\u8fd9\u4e2a\u8fc7\u7a0b\u53d8\u5f97\u5f02\u5e38\u7b80\u5355&#xff1a;<\/p>\n<p>List numbers &#061; new List { 5, 12, 8, 23, 7, 16 };<\/p>\n<p>var result &#061; numbers.Where(n &#061;&gt; n &gt; 10 &amp;&amp; n % 2 &#061;&#061; 0).OrderBy(n &#061;&gt; n);<\/p>\n<p>foreach (var number in result)<br \/>\n{<br \/>\nConsole.WriteLine(number);<br \/>\n}<\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u9996\u5148\u4f7f\u7528Where\u65b9\u6cd5\u8fc7\u6ee4\u51fa\u7b26\u5408\u6761\u4ef6\u7684\u6570\u5b57&#xff0c;\u7136\u540e\u901a\u8fc7OrderBy\u65b9\u6cd5\u5bf9\u5176\u8fdb\u884c\u6392\u5e8f\u3002\u6700\u7ec8\u7ed3\u679c\u4e3a\u4e00\u4e2a\u5e8f\u5217&#xff0c;\u5176\u4e2d\u5305\u542b\u5927\u4e8e10\u7684\u5076\u6570&#xff0c;\u5e76\u6309\u7167\u4ece\u5c0f\u5230\u5927\u7684\u987a\u5e8f\u6392\u5217\u3002<\/p>\n<p>LINQ to SQL<\/p>\n<p>\u9664\u4e86\u64cd\u4f5c\u5185\u5b58\u4e2d\u7684\u96c6\u5408\u5916&#xff0c;LINQ\u8fd8\u53ef\u4ee5\u7528\u4e8e\u8bbf\u95ee\u6570\u636e\u5e93\u3002LINQ to SQL\u662f\u4e00\u4e2a\u7ec4\u4ef6&#xff0c;\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u4f7f\u7528LINQ\u8bed\u6cd5\u76f4\u63a5\u67e5\u8be2SQL Server\u6570\u636e\u5e93\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4ec5\u7b80\u5316\u4e86\u6570\u636e\u5e93\u4ea4\u4e92\u7684\u8fc7\u7a0b&#xff0c;\u8fd8\u589e\u5f3a\u4e86\u7c7b\u578b\u5b89\u5168\u6027\u3002<\/p>\n<p>\u4f8b\u5982&#xff0c;\u8981\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u6240\u6709\u5e74\u9f84\u5927\u4e8e20\u5c81\u7684\u7528\u6237&#xff0c;\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u6837\u64cd\u4f5c&#xff1a;<\/p>\n<p>using (var context &#061; new MyDatabaseContext())<br \/>\n{<br \/>\nvar users &#061; from user in context.Users<br \/>\nwhere user.Age &gt; 20<br \/>\nselect user;<\/p>\n<p>foreach (var user in users)<br \/>\n{<br \/>\n    Console.WriteLine(user.Name);<br \/>\n}<\/p>\n<p>}<\/p>\n<p>\u8fd9\u91ccMyDatabaseContext\u4ee3\u8868\u4e86\u6570\u636e\u5e93\u4e0a\u4e0b\u6587&#xff0c;\u5b83\u662f\u5b9e\u4f53\u6846\u67b6\u7684\u4e00\u90e8\u5206&#xff0c;\u8d1f\u8d23\u7ba1\u7406\u4e0e\u6570\u636e\u5e93\u7684\u8fde\u63a5\u53ca\u64cd\u4f5c\u3002<\/p>\n<p>LINQ\u7684\u4f18\u52bf<\/p>\n<ul>\n<li>\u63d0\u9ad8\u751f\u4ea7\u529b&#xff1a;LINQ\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u76f4\u89c2\u7684\u65b9\u5f0f\u6765\u8868\u8fbe\u67e5\u8be2\u903b\u8f91&#xff0c;\u51cf\u5c11\u4e86\u8bb8\u591a\u624b\u52a8\u7f16\u5199\u7684\u4ee3\u7801\u3002<\/li>\n<li>\u589e\u5f3a\u53ef\u8bfb\u6027&#xff1a;\u7531\u4e8e\u5176\u63a5\u8fd1\u81ea\u7136\u8bed\u8a00\u7684\u8868\u8fbe\u65b9\u5f0f&#xff0c;LINQ\u67e5\u8be2\u901a\u5e38\u6bd4\u4f20\u7edf\u8fed\u4ee3\u8bed\u53e5\u66f4\u5bb9\u6613\u7406\u89e3\u3002<\/li>\n<li>\u8de8\u5e73\u53f0\u652f\u6301&#xff1a;\u65e0\u8bba\u60a8\u662f\u5728\u5904\u7406\u5bf9\u8c61\u96c6\u5408\u3001XML\u6587\u6863\u8fd8\u662f\u6570\u636e\u5e93&#xff0c;\u90fd\u53ef\u4ee5\u4f7f\u7528\u76f8\u540c\u7684LINQ\u8bed\u6cd5\u3002<\/li>\n<\/ul>\n<p>\u7ed3\u8bba<\/p>\n<p>LINQ\u662fC#\u7f16\u7a0b\u8bed\u8a00\u4e2d\u4e00\u9879\u975e\u5e38\u5f3a\u5927\u7684\u7279\u6027&#xff0c;\u5b83\u6781\u5927\u5730\u7b80\u5316\u4e86\u6570\u636e\u5904\u7406\u4efb\u52a1&#xff0c;\u4f7f\u5f97\u5f00\u53d1\u8005\u80fd\u591f\u4e13\u6ce8\u4e8e\u4e1a\u52a1\u903b\u8f91\u800c\u975e\u5e95\u5c42\u7ec6\u8282\u3002\u901a\u8fc7\u5b66\u4e60\u548c\u5e94\u7528LINQ&#xff0c;\u4e0d\u4ec5\u53ef\u4ee5\u63d0\u5347\u4e2a\u4eba\u6280\u80fd&#xff0c;\u8fd8\u80fd\u663e\u8457\u63d0\u9ad8\u9879\u76ee\u7684\u5f00\u53d1\u6548\u7387\u3002\u5e0c\u671b\u672c\u6587\u80fd\u4e3a\u60a8\u63d0\u4f9b\u8db3\u591f\u7684\u4fe1\u606f\u6765\u5f00\u59cb\u60a8\u7684LINQ\u4e4b\u65c5&#xff0c;\u5e76\u9f13\u52b1\u60a8\u63a2\u7d22\u66f4\u591a\u9ad8\u7ea7\u7279\u6027\u548c\u7528\u6cd5\u3002<\/p>\n<p>\u53c2\u8003\u8d44\u6599<\/p>\n<ul>\n<li>Microsoft Docs &#8211; LINQ<\/li>\n<li>101 LINQ Samples<\/li>\n<li>Entity Framework Documentation<\/li>\n<\/ul>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u4ecb\u7ecd\u4e86C#\u4e2dLINQ\u7684\u57fa\u672c\u6982\u5ff5\u548c\u7528\u9014&#xff0c;\u65e8\u5728\u5e2e\u52a9\u8bfb\u8005\u7406\u89e3\u548c\u5229\u7528LINQ\u7b80\u5316\u65e5\u5e38\u7684\u6570\u636e\u67e5\u8be2\u548c\u64cd\u4f5c\u4efb\u52a1\u3002\u540c\u65f6&#xff0c;\u4e5f\u9f13\u52b1\u8bfb\u8005\u8fdb\u4e00\u6b65\u63a2\u7d22LINQ\u63d0\u4f9b\u7684\u4e30\u5bcc\u529f\u80fd&#xff0c;\u4ee5\u5145\u5206\u53d1\u6325\u5176\u6f5c\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f15\u8a00<br \/>\n\u5728\u73b0\u4ee3\u8f6f\u4ef6\u5f00\u53d1\u4e2d&#xff0c;\u5904\u7406\u548c\u64cd\u4f5c\u6570\u636e\u662f\u4e0d\u53ef\u907f\u514d\u7684\u4efb\u52a1\u3002\u65e0\u8bba\u662f\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\u4fe1\u606f&#xff0c;\u8fd8\u662f\u5bf9\u5185\u5b58\u4e2d\u7684\u96c6\u5408\u8fdb\u884c\u7b5b\u9009\u3001\u6392\u5e8f\u7b49\u64cd\u4f5c&#xff0c;\u5f00\u53d1\u8005\u90fd\u9700\u8981\u4e00\u79cd\u9ad8\u6548\u4e14\u6613\u4e8e\u4f7f\u7528\u7684\u65b9\u6cd5\u3002C#\u4e2d\u7684LINQ&#xff08;Language Integrated Query&#xff09;\u6b63\u662f\u4e3a\u6b64\u800c\u751f&#xff0c;\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7edf\u4e00\u7684\u65b9\u5f0f\u6765\u8fdb\u884c\u6570\u636e\u67e5\u8be2\u548c\u64cd\u4f5c&#xff0c;\u4f7f\u5f97\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u6613\u8bfb\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8LINQ\u7684\u57fa\u7840\u77e5\u8bc6\u53ca\u5176\u5e94\u7528\u573a\u666f\u3002<br \/>\nLINQ\u7b80\u4ecb<br \/>\nLINQ\u662f\u5728<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,190],"topic":[],"class_list":["post-66471","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-190"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C#\u4e2d\u7684LINQ\uff1a\u7b80\u5316\u6570\u636e\u67e5\u8be2\u4e0e\u64cd\u4f5c - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/66471.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C#\u4e2d\u7684LINQ\uff1a\u7b80\u5316\u6570\u636e\u67e5\u8be2\u4e0e\u64cd\u4f5c - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u5f15\u8a00 \u5728\u73b0\u4ee3\u8f6f\u4ef6\u5f00\u53d1\u4e2d&#xff0c;\u5904\u7406\u548c\u64cd\u4f5c\u6570\u636e\u662f\u4e0d\u53ef\u907f\u514d\u7684\u4efb\u52a1\u3002\u65e0\u8bba\u662f\u4ece\u6570\u636e\u5e93\u8bfb\u53d6\u4fe1\u606f&#xff0c;\u8fd8\u662f\u5bf9\u5185\u5b58\u4e2d\u7684\u96c6\u5408\u8fdb\u884c\u7b5b\u9009\u3001\u6392\u5e8f\u7b49\u64cd\u4f5c&#xff0c;\u5f00\u53d1\u8005\u90fd\u9700\u8981\u4e00\u79cd\u9ad8\u6548\u4e14\u6613\u4e8e\u4f7f\u7528\u7684\u65b9\u6cd5\u3002C#\u4e2d\u7684LINQ&#xff08;Language Integrated 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