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

Question

How do I disable this page validation entirely and for good in ASP.NET MVC 3?

I have looked through the error message and the other questions with the same title. None of the suggested solutions help:

• I do have a

  <httpRuntime requestValidationMode="2.0" />
  

  in the <system.web> section in Web.config.

• I also do have a validateRequest="false" attribute on the <pages>...</pages> element.

But I am still getting the error. What else can I try?

Answer 1

Add the following line of code:

GlobalFilters.Filters.Add(new ValidateInputAttribute(false));

to the Application_Start() method.

Answer 2

Add [AllowHtml] to the action, parameter, or property.

EDIT: If you want to allow it anywhere, add new ValidateInputAttribute(false)] to GlobalFilters.Filters.