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• Re: Validation of viewstate MAC failed / The state information is invalid for this page and might be corrupted

  thanks you both.

  Posted to State Management (Forum) by crystal.net on 2/7/2006

• Re: Validation of viewstate MAC failed error....

  check this out: http://www.aspnetresources.com/tools/keycreator.aspx

  Posted to State Management (Forum) by crystal.net on 2/6/2006

• Re: Validation of viewstate MAC failed / The state information is invalid for this page and might be corrupted

  @Eilon no answer is also an answer ;-) thanks anyway.

  Posted to State Management (Forum) by crystal.net on 2/6/2006

• Re: Validation of viewstate MAC failed / The state information is invalid for this page and might be corrupted

  @joteke "To clarify, that's because GridView requests View state to be encrypted, since those ID's in database might require secure handling (e.g it does that if DataKeyNames are set). viewStateEncryptionMode setting in config (or corresponding property on Page class) overrides that behaviour. Default mode, Auto, is to encrypt if controls require that, otherwise not." okay, that makes sense. thanks for clarifying :-) @Eilon there are still two questions unanswered: "i've also analyzed the rendered

  Posted to State Management (Forum) by crystal.net on 2/2/2006

• Re: Validation of viewstate MAC failed / The state information is invalid for this page and might be corrupted

  oh, i forgot to mention an important thing: you may remember i wrote reported problem only occurs using "DataKeyNames" in GridView. AND THIS IS ABSOLUTELY CORRECT! just have a look at rendered source code. if you are using property "DataKeyNames" you'll get rendered hidden field "__VIEWSTATEENCRYPTED". if you aren't using it, the hidden form field doesn't exist! => so i think this whole event validation/encryption stuff is NOT proper!

  Posted to State Management (Forum) by crystal.net on 2/1/2006

• Re: Validation of viewstate MAC failed / The state information is invalid for this page and might be corrupted

  first of all i wanna thank you both, joteke and eilon, for analyzing/supporting this thread! "if you guys add this to web.config, does it still reproduce? <pages validateRequest="false" enableEventValidation="false" viewStateEncryptionMode ="Never" />" this workaround (switching off the whole event validation security) works great. all our applications are running fine now on asp.net 2.0 final with property viewStateExncryptionMode set to Never! i've also analyzed the rendered source code

  Posted to State Management (Forum) by crystal.net on 2/1/2006

• Re: Validation of viewstate MAC failed / The state information is invalid for this page and might be corrupted

  hey joteke, thanks for taking time! i've spent the morning for reproducing a small sample page that points out the reported bug. i used a < asp : XmlDataSource> instead of <asp:SqlDataSource> for make it independent of any configuration ressources. you can download the source here: http://www.espace.ch/viewstateProblem.rar you have to click very quickly (serveral times) in doing the postback for reproducing the bug in the sample page!!! for those guys who think the navigation behavior

  Posted to State Management (Forum) by crystal.net on 1/31/2006

• Re: New Item added multiple times upon refresh

  hey guys, that's a very interesting and good thread here. i translated mbanavige's code into C# more or less. it works great in asp.net 2.0 final. thanks a lot @ll developers who had the idea handling this postback/refresh problem! CustomBasePage.cs: using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; public class CustomBasePage

  Posted to Getting Started (Forum) by crystal.net on 1/30/2006

• Re: New Item added multiple times upon refresh

  hey guys, that's a very interesting and good thread here. i translated mbanavige's code into C# more or less. it works great in asp.net 2.0 final. thanks a lot @ll developers who had the idea handling this postback/refresh problem! CustomBasePage.cs: using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; public class CustomBasePage

  Posted to Getting Started (Forum) by crystal.net on 1/30/2006

• Re: Validation of viewstate MAC failed / The state information is invalid for this page and might be corrupted

  hey devMonky2k, thanks for your post. you haven't written it, but i'm very sure you also have the property DataKeyNames in your GridView in use.... and i had to laugh if i read about your EventValidation problem. i had the same problem and workaround, too :-) so i think it's evidence enough, microsoft supporters, we'd appreciate your help!!

  Posted to State Management (Forum) by crystal.net on 1/27/2006