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01/08/2008 at 02:45AM PST, ID: 23066050
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9.4

Website has started giving an error: "Unable to validate data". Most common on IE7

Asked by Advoco in Programming for ASP.NET

Tags: C# ASP.NET, IE7, https://www.advoco.ie/login.aspx, System.Web.HttpException: Unable to validate data.

Hi All,

I'm starting to get a bit worried about my company website. I've also noticed a drop in online sales so this is now critical.

I'm starting to get an error "Unable to validate data" when I access some pages from my main machine which is Vista-64 with IE7. I'm nearly always getting this error on this michine but I've only noticed it once from my other machine - XP IE6. I have no idea what is causing it and I'd appreciate any help.

See below for the full error.

Server Error in '/' Application.
--------------------------------------------------------------------------------

Unable to validate data.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Unable to validate data.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace:


[HttpException (0x80004005): Unable to validate data.]
   System.Web.Configuration.MachineKey.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) +196
   System.Web.UI.LosFormatter.Deserialize(String input) +60

[HttpException (0x80004005): Authentication of viewstate failed.  1) If this is a cluster, edit <machineKey> configuration so all servers use the same validationKey and validation algorithm.  AutoGenerate cannot be used in a cluster.  2) Viewstate can only be posted back to the same page.  3) The viewstate for this page might be corrupted.]
   System.Web.UI.LosFormatter.Deserialize(String input) +118
   System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +102

[HttpException (0x80004005): Invalid_Viewstate
      Client IP: 79.97.0.128
      Port: 11646
      User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; WOW64; SLCC1; .NET CLR 2.0.50727; .NET CLR 3.0.04506; Media Center PC 5.0; InfoPath.2)
      ViewState: 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
      Http-Referer: https://www.advoco.ie/register.aspx
      Path: /register.aspx.]
   System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +443
   System.Web.UI.Page.LoadPageViewState() +18
   System.Web.UI.Page.ProcessRequestMain() +447

 


--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:1.1.4322.2407; ASP.NET Version:1.1.4322.2407
[+][-]01/08/08 05:53 AM, ID: 20608464

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About this solution

Zone: Programming for ASP.NET
Tags: C# ASP.NET, IE7, https://www.advoco.ie/login.aspx, System.Web.HttpException: Unable to validate data.
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Solution Provided By: ChetOS82
Participating Experts: 1
Solution Grade: A
 
 
[+][-]01/08/08 06:23 AM, ID: 20608692

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[+][-]01/08/08 06:30 AM, ID: 20608766

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