Assign value into ViewState

ViewState["User"] = "Some Value";

Retrieve value from ViewState

string user = ViewState["User"].ToString();

Remove Particular Key from ViewState

ViewState.Remove("User");

Assign custom object into ViewState

Retrieve/Convert custom object from viewstate

Using viewstate for get/set like property

public string UserName
{
get { return ViewState["username"] as string; }
set { ViewState["username"] = value; }
}


Enable ViewState by Page Level

Disable ViewState by Page Level

Enable ViewState by control Level

Disable ViewState by control Level