potentially dangerous Request.Form value was detected & Invalid postback or callback argument

Question

1.00/5 (1 vote)

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When,

C#

ValidateRequest="true"

Getting Error :
A potentially dangerous Request.Form value was detected from the client (ctl00$ContentPlaceHolder1$ckDescription="

Error Possibilities : HTML tags in Ckeditor.

When,

C#

ValidateRequest="false"

Getting Error :
Invalid postback or callback argument. Event validation is enabled using <pages enableeventvalidation="true"> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Error Possibilities : Filling Listboxs dynamically

Posted 8-Apr-15 23:40pm

Jems_007

Updated 8-Apr-15 23:42pm

v3

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Comments

[no name] 9-Apr-15 6:08am

Check my solution,in your page directive u can put this code <%@ Page ValidateRequest="false" %>.change ValidateRequest="True" to ValidateRequest="False"

3 solutions

Solution 3

Write like this in your page..

ASP.NET

<%@ Page ValidateRequest="false" %>

Ref this link : A potentially dangerous Request.Form value was detected from the client

Posted 9-Apr-15 0:04am

RajeeshMenoth

Updated 9-Apr-15 0:05am

v2

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Kamal Surani · Accepted Answer · 2015-04-08T23:54:00

Solution 2

XML

<%@ Page EnableEventValidation="true" <pre lang="xml">ValidateRequest="false" %&gt;


&lt;pre lang=&quot;xml&quot;&gt;&amp;lt;system.web&amp;gt;
   &amp;lt;pages enableEventValidation=&amp;quot;false&amp;quot;/&amp;gt;
&amp;lt;/system.web&amp;gt;&lt;/pre&gt;</pre>

Posted 8-Apr-15 23:54pm

Kamal Surani

v2

Comments

[no name] 9-Apr-15 6:09am

In your solution,there have some unusual tags.pls check and update it.

Kamal Surani 9-Apr-15 9:30am

some blog special tag so can get error but you handled error

Jems_007 · Accepted Answer · 2015-04-09T03:27:00

Solution 4

VB

<%@ Page Title="" Language="C#" MasterPageFile="~/MstrNew.Master" AutoEventWireup="true"
    CodeBehind="frmCreateBlog.aspx.cs" Inherits="frmCreateBlog"
    ValidateRequest="true" EnableEventValidation="true" %>

Problem Solved Using

VB

ValidateRequest="false" EnableEventValidation="true"

Posted 9-Apr-15 3:27am

Jems_007

Updated 9-Apr-15 3:32am

v2