{"id":170937,"date":"2024-11-06T23:04:46","date_gmt":"2024-11-06T15:04:46","guid":{"rendered":"https:\/\/server.hk\/cnblog\/170937\/"},"modified":"2024-11-06T23:04:47","modified_gmt":"2024-11-06T15:04:47","slug":"vb-net-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%ef%bc%9a%e8%ae%93%e6%95%b8%e6%93%9a%e7%ae%a1%e7%90%86%e6%9b%b4%e7%b0%a1%e5%96%ae-vb-net-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/170937\/","title":{"rendered":"VB.NET \u6578\u64da\u5eab\u67e5\u8a62\uff1a\u8b93\u6578\u64da\u7ba1\u7406\u66f4\u7c21\u55ae (vb.net \u6578\u64da\u5eab\u67e5\u8a62)"},"content":{"rendered":"

VB.NET \u6578\u64da\u5eab\u67e5\u8a62\uff1a\u8b93\u6578\u64da\u7ba1\u7406\u66f4\u7c21\u55ae<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002VB.NET \u4f5c\u70ba\u4e00\u7a2e\u5f37\u5927\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u548c\u529f\u80fd\u4f86\u7c21\u5316\u6578\u64da\u5eab\u67e5\u8a62\u7684\u904e\u7a0b\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528 VB.NET \u9032\u884c\u6578\u64da\u5eab\u67e5\u8a62\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002<\/p>\n

VB.NET \u8207\u6578\u64da\u5eab\u7684\u9023\u63a5<\/h2>\n

\u5728\u9032\u884c\u6578\u64da\u5eab\u67e5\u8a62\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002VB.NET \u652f\u6301\u591a\u7a2e\u6578\u64da\u5eab\uff0c\u5305\u62ec SQL Server\u3001MySQL \u548c Oracle \u7b49\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 ADO.NET \u9023\u63a5 SQL Server \u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n

Imports System.Data.SqlClient\n\nDim connectionString As String = \"Data Source=\u4f60\u7684\u4f3a\u670d\u5668;Initial Catalog=\u4f60\u7684\u6578\u64da\u5eab;User ID=\u4f60\u7684\u7528\u6236\u540d;Password=\u4f60\u7684\u5bc6\u78bc\"\nDim connection As New SqlConnection(connectionString)\n\nTry\n    connection.Open()\n    ' \u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\nFinally\n    connection.Close()\nEnd Try<\/code><\/pre>\n
\u57f7\u884c\u57fa\u672c\u67e5\u8a62<\/h2>\n
\u4e00\u65e6\u5efa\u7acb\u4e86\u9023\u63a5\uff0c\u5c31\u53ef\u4ee5\u57f7\u884c SQL \u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\u793a\u4f8b\uff0c\u8a72\u793a\u4f8b\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6240\u6709\u7528\u6236\u7684\u8cc7\u6599\uff1a<\/p>\n
Dim command As New SqlCommand(\"SELECT * FROM Users\", connection)\nDim reader As SqlDataReader = command.ExecuteReader()\n\nWhile reader.Read()\n    Console.WriteLine(\"\u7528\u6236\u540d: \" & reader(\"Username\").ToString())\nEnd While\n\nreader.Close()<\/code><\/pre>\n
\u4f7f\u7528\u53c3\u6578\u5316\u67e5\u8a62<\/h2>\n
\u70ba\u4e86\u63d0\u9ad8\u5b89\u5168\u6027\u4e26\u9632\u6b62 SQL \u6ce8\u5165\u653b\u64ca\uff0c\u5efa\u8b70\u4f7f\u7528\u53c3\u6578\u5316\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u53c3\u6578\u5316\u67e5\u8a62\u4f86\u6aa2\u7d22\u7279\u5b9a\u7528\u6236\u7684\u793a\u4f8b\uff1a<\/p>\n
Dim username As String = \"exampleUser\"\nDim command As New SqlCommand(\"SELECT * FROM Users WHERE Username = @Username\", connection)\ncommand.Parameters.AddWithValue(\"@Username\", username)\n\nDim reader As SqlDataReader = command.ExecuteReader()\n\nWhile reader.Read()\n    Console.WriteLine(\"\u7528\u6236\u540d: \" & reader(\"Username\").ToString())\nEnd While\n\nreader.Close()<\/code><\/pre>\n
\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da<\/h2>\n
\u9664\u4e86\u67e5\u8a62\u6578\u64da\uff0cVB.NET \u4e5f\u53ef\u4ee5\u7528\u4f86\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u66f4\u65b0\u7528\u6236\u8cc7\u6599\u7684\u793a\u4f8b\uff1a<\/p>\n
Dim updateCommand As New SqlCommand(\"UPDATE Users SET LastLogin = @LastLogin WHERE Username = @Username\", connection)\nupdateCommand.Parameters.AddWithValue(\"@LastLogin\", DateTime.Now)\nupdateCommand.Parameters.AddWithValue(\"@Username\", username)\n\nDim rowsAffected As Integer = updateCommand.ExecuteNonQuery()\nConsole.WriteLine(\"\u53d7\u5f71\u97ff\u7684\u884c\u6578: \" & rowsAffected)<\/code><\/pre>\n
\u522a\u9664\u6578\u64da\u7684\u904e\u7a0b\u985e\u4f3c\uff1a<\/p>\n
Dim deleteCommand As New SqlCommand(\"DELETE FROM Users WHERE Username = @Username\", connection)\ndeleteCommand.Parameters.AddWithValue(\"@Username\", username)\n\nDim rowsDeleted As Integer = deleteCommand.ExecuteNonQuery()\nConsole.WriteLine(\"\u522a\u9664\u7684\u884c\u6578: \" & rowsDeleted)<\/code><\/pre>\n
\u7d50\u8ad6<\/h2>\n
\u4f7f\u7528 VB.NET \u9032\u884c\u6578\u64da\u5eab\u67e5\u8a62\u4e0d\u50c5\u7c21\u55ae\uff0c\u800c\u4e14\u9ad8\u6548\u3002\u901a\u904e\u5efa\u7acb\u5b89\u5168\u7684\u9023\u63a5\u3001\u57f7\u884c\u67e5\u8a62\u4ee5\u53ca\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u7ba1\u7406\u6578\u64da\u5eab\u4e2d\u7684\u4fe1\u606f\u3002\u96a8\u8457\u6280\u8853\u7684\u9032\u6b65\uff0cVB.NET \u5c07\u7e7c\u7e8c\u5728\u6578\u64da\u7ba1\u7406\u9818\u57df\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u53ef\u9760\u7684 \u9999\u6e2f VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 \u4f3a\u670d\u5668<\/a> \u5c07\u6709\u52a9\u65bc\u63d0\u5347\u60a8\u7684\u696d\u52d9\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22 VB.NET \u6578\u64da\u5eab\u67e5\u8a62\u7684\u6280\u5de7\uff0c\u7c21\u5316\u6578\u64da\u7ba1\u7406\u6d41\u7a0b\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\uff0c\u8b93\u6578\u64da\u64cd\u4f5c\u8b8a\u5f97\u66f4\u8f15\u9b06\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-170937","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=170937"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170937\/revisions"}],"predecessor-version":[{"id":170938,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/170937\/revisions\/170938"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=170937"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=170937"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=170937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}