{"id":171749,"date":"2024-11-07T05:20:19","date_gmt":"2024-11-06T21:20:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/171749\/"},"modified":"2024-11-07T05:20:19","modified_gmt":"2024-11-06T21:20:19","slug":"vb-%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%ad%a5%e9%a9%9f%e5%8f%8a%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-%e5%a6%82%e4%bd%95%e6%8a%8a%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/171749\/","title":{"rendered":"VB \u9023\u63a5\u6578\u64da\u5eab\u7684\u6b65\u9a5f\u53ca\u6ce8\u610f\u4e8b\u9805 (\u5982\u4f55\u628a\u6578\u64da\u5eab\u9023\u63a5\u4e0a vb)"},"content":{"rendered":"<h1 id=\"vb-%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%ad%a5%e9%a9%9f%e5%8f%8a%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-eGMayOhgVs\">VB \u9023\u63a5\u6578\u64da\u5eab\u7684\u6b65\u9a5f\u53ca\u6ce8\u610f\u4e8b\u9805<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u5df2\u7d93\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002Visual Basic\uff08VB\uff09\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u7d93\u5e38\u88ab\u7528\u4f86\u958b\u767c\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\uff0c\u5176\u4e2d\u5305\u62ec\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728VB\u4e2d\u9023\u63a5\u6578\u64da\u5eab\u7684\u6b65\u9a5f\u53ca\u6ce8\u610f\u4e8b\u9805\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e4%b8%80%e3%80%81%e6%ba%96%e5%82%99%e5%b7%a5%e4%bd%9c-eGMayOhgVs\">\u4e00\u3001\u6e96\u5099\u5de5\u4f5c<\/h2>\n<p>\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u78ba\u4fdd\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u5b89\u88dd\u597dVB\u958b\u767c\u74b0\u5883\uff0c\u5982Visual Studio\u3002<\/li>\n<li>\u78ba\u4fdd\u6578\u64da\u5eab\u5df2\u7d93\u5b89\u88dd\u4e26\u904b\u884c\uff0c\u4f8b\u5982Microsoft SQL Server\u3001MySQL\u6216Access\u7b49\u3002<\/li>\n<li>\u4e86\u89e3\u6578\u64da\u5eab\u7684\u9023\u63a5\u5b57\u7b26\u4e32\u683c\u5f0f\uff0c\u9019\u5c0d\u65bc\u6210\u529f\u9023\u63a5\u81f3\u95dc\u91cd\u8981\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%ba%8c%e3%80%81%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%ad%a5%e9%a9%9f-eGMayOhgVs\">\u4e8c\u3001\u9023\u63a5\u6578\u64da\u5eab\u7684\u6b65\u9a5f<\/h2>\n<h3 id=\"1-%e5%bc%95%e5%85%a5%e5%bf%85%e8%a6%81%e7%9a%84%e5%91%bd%e5%90%8d%e7%a9%ba%e9%96%93-eGMayOhgVs\">1. \u5f15\u5165\u5fc5\u8981\u7684\u547d\u540d\u7a7a\u9593<\/h3>\n<p>\u5728VB\u4e2d\uff0c\u60a8\u9700\u8981\u5f15\u5165\u76f8\u61c9\u7684\u547d\u540d\u7a7a\u9593\u4ee5\u4f7f\u7528\u6578\u64da\u5eab\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u5c0d\u65bcSQL Server\uff0c\u60a8\u9700\u8981\u5f15\u5165\u4ee5\u4e0b\u547d\u540d\u7a7a\u9593\uff1a<\/p>\n<pre><code>Imports System.Data.SqlClient<\/code><\/pre>\n<h3 id=\"2-%e6%a7%8b%e5%bb%ba%e9%80%a3%e6%8e%a5%e5%ad%97%e7%ac%a6%e4%b8%b2-eGMayOhgVs\">2. \u69cb\u5efa\u9023\u63a5\u5b57\u7b26\u4e32<\/h3>\n<p>\u9023\u63a5\u5b57\u7b26\u4e32\u662f\u7528\u4f86\u6307\u5b9a\u5982\u4f55\u9023\u63a5\u5230\u6578\u64da\u5eab\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u9023\u63a5SQL Server\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>Dim connectionString As String = \"Server=your_server;Database=your_database;User Id=your_username;Password=your_password;\"<\/code><\/pre>\n<h3 id=\"3-%e5%89%b5%e5%bb%ba%e9%80%a3%e6%8e%a5-eGMayOhgVs\">3. \u5275\u5efa\u9023\u63a5<\/h3>\n<p>\u4f7f\u7528SqlConnection\u985e\u4f86\u5275\u5efa\u4e00\u500b\u9023\u63a5\u5c0d\u8c61\uff1a<\/p>\n<pre><code>Dim connection As New SqlConnection(connectionString)<\/code><\/pre>\n<h3 id=\"4-%e6%89%93%e9%96%8b%e9%80%a3%e6%8e%a5-eGMayOhgVs\">4. \u6253\u958b\u9023\u63a5<\/h3>\n<p>\u5728\u9032\u884c\u4efb\u4f55\u6578\u64da\u64cd\u4f5c\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u6253\u958b\u9023\u63a5\uff1a<\/p>\n<pre><code>connection.Open()<\/code><\/pre>\n<h3 id=\"5-%e5%9f%b7%e8%a1%8c%e6%95%b8%e6%93%9a%e6%93%8d%e4%bd%9c-eGMayOhgVs\">5. \u57f7\u884c\u6578\u64da\u64cd\u4f5c<\/h3>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528SqlCommand\u4f86\u57f7\u884cSQL\u67e5\u8a62\u6216\u547d\u4ee4\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u78bc\u793a\u7bc4\u4e86\u5982\u4f55\u57f7\u884c\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\uff1a<\/p>\n<pre><code>Dim command As New SqlCommand(\"SELECT * FROM your_table\", connection)<\/code><\/pre>\n<pre><code>Dim reader As SqlDataReader = command.ExecuteReader()<\/code><\/pre>\n<h3 id=\"6-%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a-eGMayOhgVs\">6. \u8655\u7406\u6578\u64da<\/h3>\n<p>\u4f7f\u7528SqlDataReader\u4f86\u8b80\u53d6\u67e5\u8a62\u7d50\u679c\uff1a<\/p>\n<pre><code>If reader.HasRows Then\n    While reader.Read()\n        Console.WriteLine(reader(\"column_name\").ToString())\n    End While\nEnd If<\/code><\/pre>\n<h3 id=\"7-%e9%97%9c%e9%96%89%e9%80%a3%e6%8e%a5-eGMayOhgVs\">7. \u95dc\u9589\u9023\u63a5<\/h3>\n<p>\u5b8c\u6210\u6578\u64da\u64cd\u4f5c\u5f8c\uff0c\u52d9\u5fc5\u95dc\u9589\u9023\u63a5\u4ee5\u91cb\u653e\u8cc7\u6e90\uff1a<\/p>\n<pre><code>reader.Close()\nconnection.Close()<\/code><\/pre>\n<h2 id=\"%e4%b8%89%e3%80%81%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-eGMayOhgVs\">\u4e09\u3001\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li><strong>\u5b89\u5168\u6027\uff1a<\/strong>\u5728\u8655\u7406\u6578\u64da\u5eab\u9023\u63a5\u6642\uff0c\u8acb\u78ba\u4fdd\u4f7f\u7528\u5b89\u5168\u7684\u9023\u63a5\u5b57\u7b26\u4e32\uff0c\u907f\u514d\u5c07\u654f\u611f\u4fe1\u606f\u786c\u7de8\u78bc\u5728\u4ee3\u78bc\u4e2d\u3002<\/li>\n<li><strong>\u932f\u8aa4\u8655\u7406\uff1a<\/strong>\u4f7f\u7528Try-Catch\u8a9e\u53e5\u4f86\u6355\u7372\u53ef\u80fd\u51fa\u73fe\u7684\u7570\u5e38\uff0c\u78ba\u4fdd\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\u3002<\/li>\n<li><strong>\u8cc7\u6e90\u7ba1\u7406\uff1a<\/strong>\u78ba\u4fdd\u5728\u4f7f\u7528\u5b8c\u6578\u64da\u5eab\u9023\u63a5\u5f8c\uff0c\u6b63\u78ba\u95dc\u9589\u9023\u63a5\uff0c\u907f\u514d\u8cc7\u6e90\u6cc4\u6f0f\u3002<\/li>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u5c0d\u65bc\u983b\u7e41\u7684\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u9023\u63a5\u6c60\u4f86\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 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