{"id":183594,"date":"2024-11-10T06:07:18","date_gmt":"2024-11-09T22:07:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/183594\/"},"modified":"2024-11-10T06:07:19","modified_gmt":"2024-11-09T22:07:19","slug":"%e4%bd%bf%e7%94%a8ado-net%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b5%b1%e8%a8%88%e5%88%86%e6%9e%90%e5%8a%9f%e8%83%bd-ado-net-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b5%b1%e8%a8%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/183594\/","title":{"rendered":"\u4f7f\u7528ADO.NET\u5be6\u73fe\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u529f\u80fd (ado.net \u6578\u64da\u5eab\u7d71\u8a08)"},"content":{"rendered":"

\u4f7f\u7528ADO.NET\u5be6\u73fe\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u529f\u80fd<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u5df2\u6210\u70ba\u4f01\u696d\u6c7a\u7b56\u7684\u91cd\u8981\u5de5\u5177\u3002ADO.NET\u4f5c\u70ba.NET\u6846\u67b6\u7684\u4e00\u90e8\u5206\uff0c\u63d0\u4f9b\u4e86\u4e00\u5957\u5f37\u5927\u7684\u5de5\u5177\u4f86\u9023\u63a5\u548c\u64cd\u4f5c\u6578\u64da\u5eab\uff0c\u4e26\u9032\u884c\u6578\u64da\u5206\u6790\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528ADO.NET\u5be6\u73fe\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u4ec0\u9ebc\u662fADO.NET\uff1f<\/h2>\n

ADO.NET\u662f\u4e00\u500b\u7528\u65bc\u6578\u64da\u8a2a\u554f\u7684\u6280\u8853\uff0c\u5141\u8a31\u958b\u767c\u4eba\u54e1\u5f9e\u5404\u7a2e\u6578\u64da\u6e90\uff08\u5982SQL Server\u3001Oracle\u3001MySQL\u7b49\uff09\u4e2d\u6aa2\u7d22\u548c\u64cd\u4f5c\u6578\u64da\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u500b\u9748\u6d3b\u7684\u67b6\u69cb\uff0c\u652f\u6301\u9023\u63a5\u6c60\u3001\u4e8b\u52d9\u8655\u7406\u548c\u7570\u6b65\u64cd\u4f5c\u7b49\u529f\u80fd\uff0c\u9069\u5408\u7528\u65bc\u69cb\u5efa\u9ad8\u6548\u7684\u6578\u64da\u9a45\u52d5\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n

\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u7684\u5fc5\u8981\u6027<\/h2>\n

\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u53ef\u4ee5\u5e6b\u52a9\u4f01\u696d\u4e86\u89e3\u5176\u696d\u52d9\u904b\u4f5c\u7684\u5404\u500b\u65b9\u9762\uff0c\u5305\u62ec\u92b7\u552e\u8da8\u52e2\u3001\u5ba2\u6236\u884c\u70ba\u548c\u5e02\u5834\u9700\u6c42\u7b49\u3002\u901a\u904e\u5206\u6790\u6578\u64da\uff0c\u4f01\u696d\u53ef\u4ee5\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\uff0c\u512a\u5316\u8cc7\u6e90\u914d\u7f6e\uff0c\u4e26\u63d0\u9ad8\u6574\u9ad4\u6548\u7387\u3002<\/p>\n

\u4f7f\u7528ADO.NET\u9032\u884c\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u7684\u6b65\u9a5f<\/h2>\n

1. \u9023\u63a5\u6578\u64da\u5eab<\/h3>\n

\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528ADO.NET\u9023\u63a5SQL Server\u7684\u793a\u4f8b\uff1a<\/p>\n

using System;\nusing System.Data.SqlClient;\n\nclass Program\n{\n    static void Main()\n    {\n        string connectionString = \"Data Source=server;Initial Catalog=database;User ID=user;Password=password;\";\n        using (SqlConnection connection = new SqlConnection(connectionString))\n        {\n            connection.Open();\n            Console.WriteLine(\"\u6578\u64da\u5eab\u9023\u63a5\u6210\u529f\uff01\");\n        }\n    }\n}<\/code><\/pre>\n
2. \u57f7\u884c\u67e5\u8a62<\/h3>\n
\u9023\u63a5\u6210\u529f\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u57f7\u884cSQL\u67e5\u8a62\u4f86\u7372\u53d6\u6240\u9700\u7684\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u67e5\u8a62\u92b7\u552e\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n
string query = \"SELECT ProductID, SUM(Quantity) AS TotalQuantity FROM Sales GROUP BY ProductID\";\nusing (SqlCommand command = new SqlCommand(query, connection))\n{\n    using (SqlDataReader reader = command.ExecuteReader())\n    {\n        while (reader.Read())\n        {\n            Console.WriteLine($\"\u7522\u54c1ID: {reader[\"ProductID\"]}, \u7e3d\u6578\u91cf: {reader[\"TotalQuantity\"]}\");\n        }\n    }\n}<\/code><\/pre>\n
3. \u6578\u64da\u5206\u6790<\/h3>\n
\u7372\u53d6\u6578\u64da\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u9032\u884c\u9032\u4e00\u6b65\u7684\u5206\u6790\u3002\u4f8b\u5982\uff0c\u6211\u5011\u53ef\u4ee5\u8a08\u7b97\u6bcf\u500b\u7522\u54c1\u7684\u5e73\u5747\u92b7\u552e\u91cf\uff1a<\/p>\n
int totalProducts = 0;\nint totalQuantity = 0;\n\nwhile (reader.Read())\n{\n    totalProducts++;\n    totalQuantity += (int)reader[\"TotalQuantity\"];\n}\n\ndouble averageQuantity = (double)totalQuantity \/ totalProducts;\nConsole.WriteLine($\"\u5e73\u5747\u92b7\u552e\u91cf: {averageQuantity}\");<\/code><\/pre>\n
\u7d50\u8ad6<\/h2>\n
\u4f7f\u7528ADO.NET\u9032\u884c\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u662f\u4e00\u500b\u9ad8\u6548\u4e14\u9748\u6d3b\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u7c21\u55ae\u7684\u6b65\u9a5f\uff0c\u6211\u5011\u53ef\u4ee5\u9023\u63a5\u6578\u64da\u5eab\u3001\u57f7\u884c\u67e5\u8a62\u4e26\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u5f9e\u800c\u7372\u5f97\u6709\u50f9\u503c\u7684\u5546\u696d\u6d1e\u5bdf\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u638c\u63e1\u9019\u4e9b\u6280\u8853\u5c07\u5c0d\u4f01\u696d\u7684\u6210\u529f\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u63a2\u8a0e\u4e86\u5982\u4f55\u4f7f\u7528ADO.NET\u5be6\u73fe\u6578\u64da\u5eab\u7d71\u8a08\u5206\u6790\u529f\u80fd\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u80fd\u5e6b\u52a9\u4f01\u696d\u66f4\u597d\u5730\u7406\u89e3\u5176\u6578\u64da\uff0c\u9084\u80fd\u4fc3\u9032\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u5206\u6790\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5b58\u5132\u9084\u662f\u6578\u64da\u8655\u7406\uff0c\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u90fd\u80fd\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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