{"id":21248,"date":"2024-03-15T21:43:41","date_gmt":"2024-03-15T21:43:41","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-datatable-select-in-c\/"},"modified":"2024-03-21T20:02:00","modified_gmt":"2024-03-21T20:02:00","slug":"what-is-the-usage-of-datatable-select-in-c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-datatable-select-in-c\/","title":{"rendered":"What is the usage of datatable select in C#?"},"content":{"rendered":"<p>The DataTable class in C# offers a Select method that allows you to select rows that meet specified criteria from the DataTable.<\/p>\n<p>The syntax of the Select method is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-function\"><span class=\"hljs-keyword\">public<\/span> DataRow[] <span class=\"hljs-title\">Select<\/span>(<span class=\"hljs-params\"><span class=\"hljs-built_in\">string<\/span> filterExpression<\/span>)<\/span>;\r\n<\/code><\/pre>\n<p>The filterExpression parameter, which is a string, is used to specify the filtering criteria. It supports the logical combination of multiple conditions by using operators (such as =, >, <, etc.) and logical operators (such as AND, OR) to create complex conditions.<\/p>\n<p>The sample code is shown below:<\/p>\n<pre class=\"post-pre\"><code>DataTable dataTable = <span class=\"hljs-keyword\">new<\/span> DataTable();\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5047\u8bbedataTable\u4e2d\u5305\u542b\u4ee5\u4e0b\u5217\uff1aName\uff08\u59d3\u540d\uff09\u3001Age\uff08\u5e74\u9f84\uff09\u3001Gender\uff08\u6027\u522b\uff09<\/span>\r\n\r\n<span class=\"hljs-comment\">\/\/ \u9009\u62e9\u5e74\u9f84\u5927\u4e8e\u7b49\u4e8e18\u7684\u884c<\/span>\r\nDataRow[] rows = dataTable.Select(<span class=\"hljs-string\">\"Age &gt;= 18\"<\/span>);\r\n\r\n<span class=\"hljs-comment\">\/\/ \u9009\u62e9\u59d3\u540d\u4e3a\"\u5f20\u4e09\"\u4e14\u6027\u522b\u4e3a\"\u7537\"\u7684\u884c<\/span>\r\nDataRow[] rows = dataTable.Select(<span class=\"hljs-string\">\"Name = '\u5f20\u4e09' AND Gender = '\u7537'\"<\/span>);\r\n<\/code><\/pre>\n<p>The Select method returns an array of DataRow containing all rows that meet the conditions. You can access the data of each row by iterating through the array.<\/p>\n<p>Note: When building the filterExpression, make sure to use quotes correctly according to the specific data type. For example, if a column is of string type, wrap the string value in single quotes; if a column is of number type, do not use quotes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The DataTable class in C# offers a Select method that allows you to select rows that meet specified criteria from the DataTable. The syntax of the Select method is as follows: public DataRow[] Select(string filterExpression); The filterExpression parameter, which is a string, is used to specify the filtering criteria. It supports the logical combination of [&hellip;]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-21248","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the usage of datatable select in C#? - Blog - Silicon Cloud<\/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.silicloud.com\/blog\/what-is-the-usage-of-datatable-select-in-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the usage of datatable select in C#?\" \/>\n<meta property=\"og:description\" content=\"The DataTable class in C# offers a Select method that allows you to select rows that meet specified criteria from the DataTable. 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