[ASP.NET]Error: A potentially dangerous Request.QueryString value was detected

Error Message

"A potentially dangerous Request.QueryString value was detected from the client " 

Cause

.NET Framework 1.1 is installed on an application that was developed using .NET 1.0. .NET 1.1 uses a higher security setting by default, so a security message that 1.0 users don't see is visable.

Solution or Workaround

Disable these error messages by lowering the security settings. Set validateRequest=false in the Page directive of the *.aspx page that displayed the error. This will turn off request validation for that page only.

The first line should be similar to this in VB.NET:

< %@ Page Language = " vb "  AutoEventWireup = " false "  Codebehind = " WebForm1.aspx.vb "   Inherits = " TestWebGUI.WebForm1 "  validateRequest = false % >  

or

< configuration >
    < system .web >
       < pages  validateRequest ="false"   />
    </ system.web >
</ configuration >

Other References: Request Validation - Preventing Script Attacks

转载于:https://www.cnblogs.com/hacker84/archive/2008/03/13/1103268.html