ValidateRequest false doesn t work in Asp Net 4

Question

I have a form at which I use ckeditor  This form worked fine at Asp Net 2 0 and 3 5 but now it doesn t work in Asp Net 4   I have ValidateRequest  false  directive  Any suggestions

User · Accepted Answer

Found solution on the error page itself  Just needed to add requestValidationMode  quot 2 0 quot  in web config  lt system web gt       lt compilation debug  quot true quot  targetFramework  quot 4 0 quot    gt       lt httpRuntime requestValidationMode  quot 2 0 quot    gt   lt  system web gt   MSDN information  HttpRuntimeSection RequestValidationMode Property

User · Answer

Note that another approach is to keep with the 4 0 validation behaviour  but to define your own class that derives from RequestValidator and set    lt httpRuntime requestValidationType  YourNamespace YourValidator    gt     where YourNamespace YourValidator is well  you should be able to guess      This way you keep the advantages of 4 0s behaviour  specifically  that the validation happens earlier in the processing   while also allowing the requests you need to let through  through

User · Answer

I know this is an old question  but if you encounter this problem in MVC 3 then you can decorate your ActionMethod with  ValidateInput false   and just switch off request validation for a single ActionMethod  which is handy  And you don t need to make any changes to the web config file  so you can still use the  NET 4 request validation everywhere else   e g    ValidateInput false   public ActionMethod Edit int id  string value           Do your own checking of value since it could contain XSS stuff      return View

User · Answer

This works without changing the validation mode   You have to use a System Web Helpers Validation Unvalidated helper from System Web WebPages dll  It is going to return a UnvalidatedRequestValues object which allows to access the form and QueryString without validation   For example   var queryValue   Server UrlDecode Request Unvalidated  MyQueryKey       Works for me for MVC3 and  NET 4

User · Answer

There is a way to turn the validation back to 2 0 for one page   Just add the below code to your web config    lt configuration gt       lt location path  XX YY  gt           lt system web gt               lt httpRuntime requestValidationMode  2 0    gt           lt  system web gt       lt  location gt               the rest of your configuration           lt  configuration gt

[asp.net] ValidateRequest="false" doesn't work in Asp.Net 4

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