{"id":243,"date":"2009-07-25T20:39:04","date_gmt":"2009-07-25T20:39:04","guid":{"rendered":""},"modified":"2009-07-25T20:39:04","modified_gmt":"2009-07-25T20:39:04","slug":"243","status":"publish","type":"post","link":"https:\/\/www.poloo.org\/?p=243","title":{"rendered":"\u4e0d\u8981\u76f8\u4fe1\u7684\u624b\u4e0b\u7684\u4ee3\u7801"},"content":{"rendered":"<p>1.\u4e0d\u8981\u76f8\u4fe1Request.QueryString:<\/p>\n<p>\u76f8\u4fe1\u5728asp\u65f6\u4ee3\uff0c\u8fd9\u4e2a\u95ee\u9898\u6bd4\u8f83\u4e25\u91cd\uff0c\u4e0d\u4fe1\uff0c\u968f\u4fbf\u5230\u7f51\u7edc\u4e0a\u627e\u51e0\u4e2aasp\u7684\u4f01\u4e1a\u7ad9\uff0c\u627e\u5230\u8fd9\u79cdurl\u201dview.asp?id=xxx\u201d,\u6539\u6210\u201dview.asp?id=xxx or 1=1\u2033,\u76f8\u4fe1\u4f60\u4f1a\u770b\u5230\u4e0d\u4e00\u6837\u7684\u4e1c\u897f\uff0c\u5230\u4e86.net\uff0c\u5e94\u8be5\u5f88\u5c11\u4e86\uff0c\u4e0d\u8fc7\u4e0a\u6b21\u770b\u5230\u6709\u4eba\u8bf4CSDN\u7206\u8fc7\u54e6\uff0c\u7b80\u5355\u7684\u89e3\u51b3\u65b9\u6cd5\u662f\u5728\u53d6\u5f97\u6570\u636e\u65f6\u505a\u6570\u636e\u7c7b\u578b\u9a8c\u8bc1\u6216\u8f6c\u6362\u3002\u6bd4\u5982:<br \/>int ViewID = 0;<br \/>if(int.TryParse(Request.QueryString[&#8220;ID&#8221;], out ViewID)){<br \/>\/\/\u2026<br \/>}<\/p>\n<p>2.\u4e0d\u8981\u76f8\u4fe1maxlength:<\/p>\n<p>\u6709\u65f6\u5019\u6211\u4eec\u60f3\u5ba2\u6237\u7aef\u8f93\u5165\u7684\u67d0\u4e2a\u503c\u4e0d\u8d85\u8fc7\u4e00\u5b9a\u7684\u957f\u5ea6\uff0c\u8fd9\u4e2a\u65f6\u5019\u53ef\u80fd\u5c31\u4f1a\u7528\u5230input\u7684maxlength\uff0c\u4f46maxlength\u80fd100%\u4fdd\u8bc1\u8fd9\u4e2a\u503c\u7684\u957f\u5ea6\u4e0d\u8d85\u8fc7maxlength\u5417\uff1f<\/p>\n<p>\u663e\u7136\uff0cmaxlength\u662f\u4e0d\u53ef\u4fe1\u7684\uff0c\u7b80\u5355\u7684\u89e3\u51b3\u529e\u6cd5\u662f\u540e\u53f0\u4ee3\u7801\u9a8c\u8bc1\u6570\u636e\u957f\u5ea6\uff1a<br \/>string UserName = Request.QueryString[&#8220;UserName&#8221;];<br \/>if(!string.IsNullOrEmpty(UserName)&#038;&#038;UserName.length &gt; 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