Invalid view state exception in asp.net. do you know any solution?
- by mmtemporary
this problem make me crazy!
i have asp.net website it raise periodically this error (in IE8):
System.Web.HttpException: Invalid viewstate.
at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType)
at System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler
.ProcessRequest(HttpContext context)
,...
or (in IE6)
System.FormatException: Invalid length for a Base-64 char array.
at System.Convert.FromBase64String(String s)
at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
or (in IE7)
System.FormatException: Invalid character in a Base-64 string.
at System.Convert.FromBase64String(String s)
at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString)
i set enableViewStateMac in web.config to false and defined machinekey in my web.config and defined UTF-8 encoding for every page
but i received this errors.
do you have any solution?
best regards
