System.Web.HttpRequestValidationException

Sudarshan Nandakumar

A potentially dangerous Request.Form value was detected from the client

The above mentioned exception occurs for few users and few times alone.If we see the error logs this error occrus for specific users in specific page only.But if the user try it again,it works fine most of the times....

This exception needs to fixed or handled.......

6 Replies

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Iftikar Hussain13y ago
user might have typed some html character like '<' etc.

Regards,
Iftikar
0
Sudarshan Nandakumar13y ago
Hi All,

Thanks for your suggestions.

Can you let me know the possible reasons for it???
0
Sanjeeb Lenka13y ago
hi just add in web.config

Example:

for details refer to this link

http://dotnetfish.blogspot.in/2007/08/systemwebhttprequestvalidationexception.html
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Iftikar Hussain13y ago
please refer the below link

http://www.vbforums.com/showthread.php?640838-RESOLVED-System-Web-HttpRequestValidationException-A-potentially-dangerous-Request-Form

Regards,
Iftikar
0
Sudarshan Nandakumar13y ago
Hi,

We are using framework 4.0 along with silverlight and Telerik Rad controls...........is there any connection with the error....
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Iftikar Hussain13y ago
Hi,

set validateRequest="false" in your page

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication1.WebForm1"
ValidateRequest="false" %>

In .NET 4 you may need to do a little more. Sometimes it's necessary to also add to web.config

Regards,
Iftikar
0