When you get this Error?....
>
Un-encoded HTML content can be dangerous to the Server.
> In order to prevent
Un-encoded HTML content, there is a feature in Asp.Net
> which is known as
Request Validation.
> Request Validation would prevent
script injection attack.
> Thereby Asp.Net web Application will be secure from script attack.
> This Issue happens when
Request Validation is enabled on the Server and
> somebody is trying to send
Un-encoded HTML content to the server.
How To Resolve This Issue?...
> We have To Turn Off the Request Validation feature for resolving this Issue.
> By turning Off Request Validation feature, we are allowing the cross script attack.
> We strongly recommend, Not To Turn Off the Request Validation feature.
> We can disable the Request Validation in page level and application level.
1. Disable Request Validation At Page Level
> On the aspx page, please set the
validateRequest property to false.
> Add
requestValidationMode to 2.0 inside
httpRuntime on
web.config as shown in the figure.
>
Thereby we can disable Request Validation for each page.
2. Disable Request Validation At Web Application Level
> On
web.config file, add the following code as shown in the figure.
> Here inside
pages node
validateRequest should be
false
> Inside
httpRuntime node, set
requestValidationMode to 2.0.
>
Thereby we can disable Request Validation At Web Application Level.
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