{"id":179560,"date":"2024-11-09T02:50:17","date_gmt":"2024-11-08T18:50:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179560\/"},"modified":"2024-11-09T02:50:18","modified_gmt":"2024-11-08T18:50:18","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-asp-%e4%b8%ad%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e7%a9%ba%e5%ad%97%e6%ae%b5%e7%9a%84%e5%88%a4%e6%96%b7%ef%bc%9f-asp-%e5%ad%97%e6%ae%b5%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179560\/","title":{"rendered":"\u5982\u4f55\u5728 ASP \u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u7a7a\u5b57\u6bb5\u7684\u5224\u65b7\uff1f (asp \u5b57\u6bb5\u6578\u64da\u5eab\u7a7a\u5224\u65b7)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8-asp-%e4%b8%ad%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e7%a9%ba%e5%ad%97%e6%ae%b5%e7%9a%84%e5%88%a4%e6%96%b7%ef%bc%9f-JGskXwaBaI\">\u5982\u4f55\u5728 ASP \u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u7a7a\u5b57\u6bb5\u7684\u5224\u65b7\uff1f<\/h1>\n<p>\u5728\u958b\u767c\u57fa\u65bc ASP \u7684\u61c9\u7528\u7a0b\u5e8f\u6642\uff0c\u6578\u64da\u5eab\u64cd\u4f5c\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u7279\u5225\u662f\u5728\u8655\u7406\u7528\u6236\u8f38\u5165\u6642\uff0c\u5224\u65b7\u6578\u64da\u5eab\u4e2d\u7684\u7a7a\u5b57\u6bb5\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u4e0d\u50c5\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u80fd\u907f\u514d\u6f5b\u5728\u7684\u932f\u8aa4\u548c\u5b89\u5168\u554f\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 ASP \u4e2d\u5be6\u73fe\u6578\u64da\u5eab\u7a7a\u5b57\u6bb5\u7684\u5224\u65b7\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%88%a4%e6%96%b7%e7%a9%ba%e5%ad%97%e6%ae%b5%ef%bc%9f-JGskXwaBaI\">\u70ba\u4ec0\u9ebc\u9700\u8981\u5224\u65b7\u7a7a\u5b57\u6bb5\uff1f<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u7a7a\u5b57\u6bb5\u53ef\u80fd\u6703\u5c0e\u81f4\u591a\u7a2e\u554f\u984c\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u5b8c\u6574\u6027\u554f\u984c\uff1a\u5982\u679c\u67d0\u4e9b\u5b57\u6bb5\u662f\u5fc5\u586b\u7684\uff0c\u7a7a\u5b57\u6bb5\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u3002<\/li>\n<li>\u61c9\u7528\u7a0b\u5e8f\u932f\u8aa4\uff1a\u5728\u9032\u884c\u6578\u64da\u8655\u7406\u6642\uff0c\u7a7a\u5b57\u6bb5\u53ef\u80fd\u6703\u5f15\u767c\u7570\u5e38\u6216\u932f\u8aa4\u3002<\/li>\n<li>\u5b89\u5168\u98a8\u96aa\uff1a\u672a\u7d93\u6aa2\u67e5\u7684\u7a7a\u5b57\u6bb5\u53ef\u80fd\u6703\u6210\u70ba SQL \u6ce8\u5165\u653b\u64ca\u7684\u6f5b\u5728\u76ee\u6a19\u3002<\/li>\n<\/ul>\n<h2 id=\"asp-%e4%b8%ad%e7%9a%84%e7%a9%ba%e5%ad%97%e6%ae%b5%e5%88%a4%e6%96%b7%e6%96%b9%e6%b3%95-JGskXwaBaI\">ASP \u4e2d\u7684\u7a7a\u5b57\u6bb5\u5224\u65b7\u65b9\u6cd5<\/h2>\n<p>\u5728 ASP \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u65b9\u6cd5\u4f86\u5224\u65b7\u6578\u64da\u5eab\u4e2d\u7684\u7a7a\u5b57\u6bb5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8-sql-%e6%9f%a5%e8%a9%a2-JGskXwaBaI\">1. \u4f7f\u7528 SQL \u67e5\u8a62<\/h3>\n<p>\u5728 SQL \u67e5\u8a62\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 IS NULL \u6216\u8005\u7a7a\u5b57\u7b26\u4e32\u4f86\u5224\u65b7\u5b57\u6bb5\u662f\u5426\u70ba\u7a7a\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>\nSELECT * FROM Users WHERE username IS NULL OR username = '';\n<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u7528\u6236\u540d\u70ba\u7a7a\u7684\u8a18\u9304\u3002<\/p>\n<h3 id=\"2-%e5%9c%a8-asp-%e4%b8%ad%e9%80%b2%e8%a1%8c%e5%88%a4%e6%96%b7-JGskXwaBaI\">2. \u5728 ASP \u4e2d\u9032\u884c\u5224\u65b7<\/h3>\n<p>\u5728 ASP \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u4f86\u6aa2\u67e5\u5b57\u6bb5\u662f\u5426\u70ba\u7a7a\uff1a<\/p>\n<pre><code>\n\n<\/code><\/pre>\n<p>\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u9996\u5148\u7372\u53d6\u7528\u6236\u8f38\u5165\u7684\u7528\u6236\u540d\uff0c\u7136\u5f8c\u4f7f\u7528 IsNull \u51fd\u6578\u548c Trim \u51fd\u6578\u4f86\u5224\u65b7\u8a72\u5b57\u6bb5\u662f\u5426\u70ba\u7a7a\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e6%ad%a3%e5%89%87%e8%a1%a8%e9%81%94%e5%bc%8f-JGskXwaBaI\">3. \u4f7f\u7528\u6b63\u5247\u8868\u9054\u5f0f<\/h3>\n<p>\u6b63\u5247\u8868\u9054\u5f0f\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u5b57\u7b26\u4e32\u7684\u683c\u5f0f\u3002\u5728 ASP \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u78bc\u4f86\u5224\u65b7\u5b57\u6bb5\u662f\u5426\u70ba\u7a7a\uff1a<\/p>\n<pre><code>\n\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u4f7f\u7528\u4e86 Like \u64cd\u4f5c\u7b26\u4f86\u6aa2\u67e5\u7528\u6236\u540d\u662f\u5426\u5305\u542b\u975e\u7a7a\u5b57\u7b26\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-JGskXwaBaI\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u5eab\u7a7a\u5b57\u6bb5\u5224\u65b7\u6642\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u59cb\u7d42\u5c0d\u7528\u6236\u8f38\u5165\u9032\u884c\u9a57\u8b49\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<li>\u4f7f\u7528\u53c3\u6578\u5316\u67e5\u8a62\u4f86\u9632\u6b62 SQL \u6ce8\u5165\u653b\u64ca\u3002<\/li>\n<li>\u5728\u6578\u64da\u5eab\u4e2d\u8a2d\u7f6e\u9069\u7576\u7684\u7d04\u675f\u689d\u4ef6\uff0c\u4f8b\u5982 NOT NULL\uff0c\u4ee5\u5f37\u5236\u57f7\u884c\u6578\u64da\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-JGskXwaBaI\">\u7e3d\u7d50<\/h2>\n<p>\u5728 ASP 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