{"id":172295,"date":"2024-11-07T11:56:16","date_gmt":"2024-11-07T03:56:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/172295\/"},"modified":"2024-11-07T11:56:17","modified_gmt":"2024-11-07T03:56:17","slug":"vb-%e4%b8%ad%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8c%89%e5%ad%97%e6%ae%b5%e6%8e%92%e5%ba%8f-vb-%e4%b8%ad-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%8c%89%e5%ad%97%e6%ae%b5%e6%8e%92","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/172295\/","title":{"rendered":"VB \u4e2d\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u6309\u5b57\u6bb5\u6392\u5e8f (vb \u4e2d \u6578\u64da\u5eab\u6309\u5b57\u6bb5\u6392\u5e8f)"},"content":{"rendered":"

VB \u4e2d\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u6309\u5b57\u6bb5\u6392\u5e8f<\/h1>\n

\u5728\u73fe\u4ee3\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\u662f\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\u65bc\u958b\u767c\u684c\u9762\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u5eab\u61c9\u7528\u7a0b\u5e8f\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 VB \u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u6309\u5b57\u6bb5\u6392\u5e8f\u7684\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u6578\u64da\u5eab\u6392\u5e8f\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

\u6578\u64da\u5eab\u6392\u5e8f\u662f\u6307\u6839\u64da\u7279\u5b9a\u5b57\u6bb5\u7684\u503c\u5c0d\u6578\u64da\u9032\u884c\u6392\u5217\u7684\u904e\u7a0b\u3002\u9019\u901a\u5e38\u662f\u901a\u904e SQL \u8a9e\u53e5\u4e2d\u7684 ORDER BY<\/code> \u5b50\u53e5\u4f86\u5be6\u73fe\u7684\u3002\u6392\u5e8f\u53ef\u4ee5\u662f\u5347\u5e8f\uff08ASC\uff09\u6216\u964d\u5e8f\uff08DESC\uff09\uff0c\u5177\u9ad4\u53d6\u6c7a\u65bc\u9700\u6c42\u3002<\/p>\n

\u5728 VB \u4e2d\u9023\u63a5\u6578\u64da\u5eab<\/h2>\n

\u5728\u9032\u884c\u6578\u64da\u6392\u5e8f\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 ADO.NET \u9023\u63a5 SQL Server \u6578\u64da\u5eab\u7684\u793a\u4f8b\uff1a<\/p>\n

Imports System.Data.SqlClient\n\nDim connectionString As String = \"Data Source=\u4f60\u7684\u6578\u64da\u5eab\u4f3a\u670d\u5668;Initial Catalog=\u4f60\u7684\u6578\u64da\u5eab\u540d\u7a31;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\u64cd\u4f5c\nFinally\n    connection.Close()\nEnd Try<\/code><\/pre>\n
\u5be6\u73fe\u6578\u64da\u5eab\u6309\u5b57\u6bb5\u6392\u5e8f<\/h2>\n
\u4e00\u65e6\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528 SQL \u67e5\u8a62\u4f86\u7372\u53d6\u4e26\u6392\u5e8f\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u6839\u64da\u67d0\u500b\u5b57\u6bb5\uff08\u4f8b\u5982\u201c\u59d3\u540d\u201d\uff09\u5c0d\u6578\u64da\u9032\u884c\u6392\u5e8f\uff1a<\/p>\n
Dim command As New SqlCommand(\"SELECT * FROM \u4f60\u7684\u8868\u540d ORDER BY \u59d3\u540d ASC\", connection)\nDim reader As SqlDataReader = command.ExecuteReader()\n\nWhile reader.Read()\n    Console.WriteLine(reader(\"\u59d3\u540d\").ToString())\nEnd While<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 SqlCommand<\/code> \u5c0d\u8c61\u57f7\u884c\u4e00\u500b SQL \u67e5\u8a62\uff0c\u8a72\u67e5\u8a62\u5f9e\u6307\u5b9a\u7684\u8868\u4e2d\u9078\u64c7\u6240\u6709\u8a18\u9304\uff0c\u4e26\u6839\u64da\u201c\u59d3\u540d\u201d\u5b57\u6bb5\u9032\u884c\u5347\u5e8f\u6392\u5e8f\u3002\u7136\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 SqlDataReader<\/code> \u9010\u884c\u8b80\u53d6\u7d50\u679c\u4e26\u8f38\u51fa\u3002<\/p>\n
\u591a\u5b57\u6bb5\u6392\u5e8f<\/h2>\n
\u5982\u679c\u9700\u8981\u6839\u64da\u591a\u500b\u5b57\u6bb5\u9032\u884c\u6392\u5e8f\uff0c\u53ef\u4ee5\u5728 ORDER BY<\/code> \u5b50\u53e5\u4e2d\u6307\u5b9a\u591a\u500b\u5b57\u6bb5\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8a62\u5c07\u9996\u5148\u6839\u64da\u201c\u59d3\u6c0f\u201d\u9032\u884c\u6392\u5e8f\uff0c\u7136\u5f8c\u6839\u64da\u201c\u540d\u5b57\u201d\u9032\u884c\u6392\u5e8f\uff1a<\/p>\n
Dim command As New SqlCommand(\"SELECT * FROM \u4f60\u7684\u8868\u540d ORDER BY \u59d3\u6c0f ASC, \u540d\u5b57 ASC\", connection)<\/code><\/pre>\n
\u932f\u8aa4\u8655\u7406<\/h2>\n
\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u932f\u8aa4\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528 Try...Catch<\/code> \u8a9e\u53e5\u4f86\u6355\u7372\u548c\u8655\u7406\u53ef\u80fd\u51fa\u73fe\u7684\u7570\u5e38\uff1a<\/p>\n
Try\n    connection.Open()\n    ' \u57f7\u884c\u67e5\u8a62\nCatch ex As SqlException\n    Console.WriteLine(\"\u6578\u64da\u5eab\u932f\u8aa4: \" & ex.Message)\nFinally\n    connection.Close()\nEnd Try<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u5728 VB \u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u6309\u5b57\u6bb5\u6392\u5e8f\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u904e\u7a0b\uff0c\u4e3b\u8981\u4f9d\u8cf4\u65bc SQL \u7684 ORDER BY<\/code> \u5b50\u53e5\u3002\u901a\u904e\u6b63\u78ba\u7684\u6578\u64da\u5eab\u9023\u63a5\u548c\u67e5\u8a62\u8a9e\u53e5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u5c0d\u6578\u64da\u9032\u884c\u6392\u5e8f\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u53ef\u7528\u6027\u548c\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f\u9700\u8981\u7a69\u5b9a\u7684 \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u9748\u6d3b\u7684 \u96f2\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u6700\u4f73\u7684\u652f\u6301\u548c\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u5728 VB \u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u6309\u5b57\u6bb5\u6392\u5e8f\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u7ba1\u7406\u6d41\u7a0b\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-172295","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172295","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=172295"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172295\/revisions"}],"predecessor-version":[{"id":172296,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/172295\/revisions\/172296"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=172295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=172295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=172295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}