{"id":171811,"date":"2024-11-07T07:51:16","date_gmt":"2024-11-06T23:51:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/171811\/"},"modified":"2024-11-07T07:51:17","modified_gmt":"2024-11-06T23:51:17","slug":"vb-%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%ef%bc%9f-vb-%e5%af%ab%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/171811\/","title":{"rendered":"VB \u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u64cd\u4f5c\uff1f (vb \u5beb\u6578\u64da\u5eab)"},"content":{"rendered":"

VB \u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u64cd\u4f5c\uff1f (VB \u5beb\u6578\u64da\u5eab)<\/h1>\n

\u5728\u73fe\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u64cd\u4f5c\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002Visual Basic\uff08VB\uff09\u4f5c\u70ba\u4e00\u7a2e\u7c21\u55ae\u6613\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u684c\u9762\u61c9\u7528\u7a0b\u5e8f\u7684\u958b\u767c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 VB \u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u5305\u62ec\u9023\u63a5\u6578\u64da\u5eab\u3001\u57f7\u884c\u67e5\u8a62\u4ee5\u53ca\u8655\u7406\u6578\u64da\u3002<\/p>\n

1. \u9023\u63a5\u6578\u64da\u5eab<\/h2>\n

\u5728 VB \u4e2d\uff0c\u9023\u63a5\u6578\u64da\u5eab\u901a\u5e38\u4f7f\u7528 ADO.NET \u6216 OleDb \u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 OleDb \u9023\u63a5 Access \u6578\u64da\u5eab\u7684\u7bc4\u4f8b\uff1a<\/p>\n

Dim conn As OleDbConnection\nDim connString As String = \"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=your_database.accdb;\"\n\nconn = New OleDbConnection(connString)\n\nTry\n    conn.Open()\n    MessageBox.Show(\"\u6578\u64da\u5eab\u9023\u63a5\u6210\u529f\uff01\")\nCatch ex As Exception\n    MessageBox.Show(\"\u6578\u64da\u5eab\u9023\u63a5\u5931\u6557\uff1a\" & ex.Message)\nFinally\n    conn.Close()\nEnd Try<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5b9a\u7fa9\u4e86\u4e00\u500b\u9023\u63a5\u5b57\u7b26\u4e32\uff0c\u7136\u5f8c\u4f7f\u7528 OleDbConnection<\/code> \u4f86\u5efa\u7acb\u9023\u63a5\u3002\u4f7f\u7528 Try...Catch...Finally<\/code> \u7d50\u69cb\u4f86\u8655\u7406\u53ef\u80fd\u51fa\u73fe\u7684\u7570\u5e38\uff0c\u78ba\u4fdd\u5728\u64cd\u4f5c\u7d50\u675f\u5f8c\u95dc\u9589\u9023\u63a5\u3002<\/p>\n
2. \u57f7\u884c\u67e5\u8a62<\/h2>\n
\u4e00\u65e6\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\uff0c\u5c31\u53ef\u4ee5\u57f7\u884c SQL \u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u57f7\u884c SELECT \u67e5\u8a62\u7684\u7bc4\u4f8b\uff1a<\/p>\n
Dim cmd As OleDbCommand\nDim reader As OleDbDataReader\n\ncmd = New OleDbCommand(\"SELECT * FROM your_table\", conn)\n\nTry\n    conn.Open()\n    reader = cmd.ExecuteReader()\n\n    While reader.Read()\n        Console.WriteLine(reader(\"column_name\").ToString())\n    End While\nCatch ex As Exception\n    MessageBox.Show(\"\u67e5\u8a62\u5931\u6557\uff1a\" & ex.Message)\nFinally\n    reader.Close()\n    conn.Close()\nEnd Try<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b OleDbCommand<\/code> \u5c0d\u8c61\u4f86\u57f7\u884c SQL \u67e5\u8a62\uff0c\u4e26\u4f7f\u7528 OleDbDataReader<\/code> \u4f86\u8b80\u53d6\u7d50\u679c\u3002\u9019\u88e1\u540c\u6a23\u4f7f\u7528\u4e86 Try...Catch...Finally<\/code> \u7d50\u69cb\u4f86\u78ba\u4fdd\u8cc7\u6e90\u7684\u6b63\u78ba\u91cb\u653e\u3002<\/p>\n
3. \u63d2\u5165\u6578\u64da<\/h2>\n
\u9664\u4e86\u67e5\u8a62\u6578\u64da\uff0cVB \u4e5f\u53ef\u4ee5\u7528\u4f86\u63d2\u5165\u6578\u64da\u5230\u6578\u64da\u5eab\u4e2d\u3002\u4ee5\u4e0b\u662f\u63d2\u5165\u6578\u64da\u7684\u7bc4\u4f8b\uff1a<\/p>\n
Dim insertCmd As OleDbCommand\ninsertCmd = New OleDbCommand(\"INSERT INTO your_table (column1, column2) VALUES (@value1, @value2)\", conn)\n\ninsertCmd.Parameters.AddWithValue(\"@value1\", \"data1\")\ninsertCmd.Parameters.AddWithValue(\"@value2\", \"data2\")\n\nTry\n    conn.Open()\n    Dim rowsAffected As Integer = insertCmd.ExecuteNonQuery()\n    MessageBox.Show(rowsAffected & \" \u884c\u6578\u64da\u5df2\u63d2\u5165\u3002\")\nCatch ex As Exception\n    MessageBox.Show(\"\u63d2\u5165\u5931\u6557\uff1a\" & ex.Message)\nFinally\n    conn.Close()\nEnd Try<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 ExecuteNonQuery<\/code> \u65b9\u6cd5\u4f86\u57f7\u884c\u63d2\u5165\u64cd\u4f5c\uff0c\u4e26\u901a\u904e\u53c3\u6578\u5316\u67e5\u8a62\u4f86\u9632\u6b62 SQL \u6ce8\u5165\u653b\u64ca\u3002<\/p>\n
4. \u66f4\u65b0\u548c\u522a\u9664\u6578\u64da<\/h2>\n
\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u7684\u64cd\u4f5c\u8207\u63d2\u5165\u985e\u4f3c\uff0c\u53ea\u9700\u66f4\u6539 SQL \u8a9e\u53e5\u5373\u53ef\u3002\u4ee5\u4e0b\u662f\u66f4\u65b0\u548c\u522a\u9664\u7684\u7bc4\u4f8b\uff1a<\/p>\n
' \u66f4\u65b0\u6578\u64da\nDim updateCmd As OleDbCommand\nupdateCmd = New OleDbCommand(\"UPDATE your_table SET column1 = @value WHERE column2 = @condition\", conn)\nupdateCmd.Parameters.AddWithValue(\"@value\", \"newData\")\nupdateCmd.Parameters.AddWithValue(\"@condition\", \"conditionData\")\n\n' \u522a\u9664\u6578\u64da\nDim deleteCmd As OleDbCommand\ndeleteCmd = New OleDbCommand(\"DELETE FROM your_table WHERE column1 = @value\", conn)\ndeleteCmd.Parameters.AddWithValue(\"@value\", \"dataToDelete\")\n<\/code><\/pre>\n
\u9019\u4e9b\u64cd\u4f5c\u7684\u57f7\u884c\u65b9\u5f0f\u8207\u63d2\u5165\u76f8\u540c\uff0c\u50c5\u9700\u8abf\u6574 SQL \u8a9e\u53e5\u5373\u53ef\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728 VB \u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u64cd\u4f5c\u662f\u76f8\u5c0d\u7c21\u55ae\u7684\uff0c\u901a\u904e\u4f7f\u7528 ADO.NET \u6216 OleDb\uff0c\u53ef\u4ee5\u8f15\u9b06\u5730\u9023\u63a5\u3001\u67e5\u8a62\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\uff0c\u7121\u8ad6\u662f\u958b\u767c\u684c\u9762\u61c9\u7528\u9084\u662f\u5176\u4ed6\u985e\u578b\u7684\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 \u9999\u6e2fVPS<\/a> \u4f86\u652f\u6301\u60a8\u7684\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\u6578\u64da\u5eab\u64cd\u4f5c\u9084\u662f\u5176\u4ed6\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 \u4f3a\u670d\u5668<\/a> \u5c07\u662f\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u5728VB\u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u5305\u62ec\u9023\u63a5\u3001\u67e5\u8a62\u548c\u6578\u64da\u7ba1\u7406\u7684\u5be6\u7528\u6280\u5de7\u8207\u7bc4\u4f8b\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-171811","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171811","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=171811"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171811\/revisions"}],"predecessor-version":[{"id":171812,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171811\/revisions\/171812"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=171811"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=171811"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=171811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}