Explicitly defining ViewState of a server

Question

Is it possible to explicitly define viewstate into a hidden field of an aspx page? I tried this and got error Exception Details: System.Web.HttpException: The state information is invalid for this page and might be corrupted. form name = Form1 method = post action =  id = Form1 runat = server > input type = hidden name = __VIEWSTATE id = __VIEWSTATE value = /wEPD..............XCny /> input type = hidden name = __EVENTVALIDATION id = __EVENTVALIDATION value = /wEdA..............ntw== /> the error doesn't come when I postback to javascript alert function without runat=server in form. But when I add runat=server and call C# button_Click(object senderEventArgs e) I get the invalid state error thanks for any kind of help

Naveen Bisht · Answer

this is not possible beause e ach control on a Web Forms page including the page itself has a ViewState property it is a built-in struture for automatic retention of page and control state which means you don’t need to do anything about getting back the data of controls after posting page to the server. Here which is useful to us is the ViewState property we can use it to save information between round trips to the server.