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CORS error when saving a form containing dropdown list modified via jQuery

Question asked by themos on Apr 6, 2016
Latest reply on Dec 18, 2018 by chaddavis

When trying to submit a form containing a dropdown list populated via jQuery, i get the following error:

 

System.ArgumentException: 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.    at System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument)     at System.Web.UI.WebControls.DropDownList.LoadPostData(String postDataKey, NameValueCollection postCollection)     at System.Web.UI.Page.ProcessPostData(NameValueCollection pos...

 

I tried enabling CORS in my Web API application, but it didn't seem to make a difference.

Do you have any idea how I can set the enableEventValidation to False in the Nintex form templates?

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