What causes invalid ViewState?

The main reason for “Invalid Viewstate” error is the exception is thrown when the ViewState has become “large” and the user clicks a button before a previous request has completed…

How do I fix invalid ViewState error?

  1. Introduction.
  2. Verify that you are not running into issues that have been fixed.
  3. Set the validationKey attribute if you are running in a Web farm.
  4. Do not store dynamically generated types in view state in a Web farm.
  5. Determine whether the problem is related to the view state MAC feature.

Does ViewState affect performance?

Although we have disabled viewstate, ASP.NET uses viewstate for some data to maintain the page state, but this is very little and not going to cause any performance overhead.

Can we use ViewState in ASP NET MVC?

ASP.NET MVC does not use ViewState in the traditional sense (that of storing the values of controls in the web page). Rather, the values of the controls are posted to a controller method. Once the controller method has been called, what you do with those values is up to you.

How do you check ViewState?

You can check viewstate on executed ASP.NET page by viewsource from browser. There you can find _VIEWSTATE kind of hidden field. ViewState increases the size of the page because page and page control value store in it.

Which is better ViewState or session?

Viewstate is more durable, since it’s maintained by the user’s browser. So even if a user sits on a page for an hour, then clicks somewhere, the page will still maintain the viewstate, while the Session will probably have expired.

Is ViewState secure?

The VIEWSTATE is a security risk if it is not encrypted (anyone could modify the VIEWSTATE values and POST to your pages.) If that page can decode the VIEWSTATE then it is not encrypted.

Why is ViewState important when you are working with ASP.NET web forms?

The view state is a key element of an ASP.NET page because it is the primary means to persist the state of the Web server controls. Whenever the page posts back, the state is restored, updated using the current form parameters, then used to run the postback event handler.

What is ViewState in ASP.NET c#?

The view state is the state of the page and all its controls. It is automatically maintained across posts by the ASP.NET framework. When a page is sent back to the client, the changes in the properties of the page and its controls are determined, and stored in the value of a hidden input field named _VIEWSTATE.

What is ViewState in ASP.NET C#?