insert operation server error

Question

Invalid postback or callback argument. Event validation is enabled using in configuration or 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.

Nilesh Shah · Answer

are you modifying content of web form after it has been loaded? means are you adding or removing some elements? If so this error can occur. First you have to identify the cause based on your code. If above is the case and security is not so much of a concern then simple most solution is to Disable eventvalidation. Or put the control you are modifying inside an AJAX update panel. post your code if you need more help

Bryian Tan · Answer

Is tough to help diagnose the issue without code. Anyway here are some article describe about the same error. http://odetocode.com/blogs/scott/archive/2006/03/20/asp-net-event-validation-and-invalid-callback-or-postback-argument.aspx https://blogs.msdn.microsoft.com/amitsh/2007/07/31/why-do-i-get-invalid-postback-or-callback-argument-errors/