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Can't set winner in a contest

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Used the code in the SDK to submit answers to a contest. The answers get submitted and can be viewed in the EPiserver Community Administration UI.

When clicking on the "Set as winner"-button on an entry, I receive the following runtime error:

Server Error in '/' Application.

Invalid use of read only object - Clone() it before making modifications.

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.InvalidOperationException: Invalid use of read only object - Clone() it before making modifications.

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:


[InvalidOperationException: Invalid use of read only object - Clone() it before making modifications.]
   EPiServer.Common.Cache.CacheableCollectionBase.ValidateReadOnly() +85
   EPiServer.Common.Cache.CacheableCollectionBase.OnInsert(Int32 index, Object value) +9
   System.Collections.CollectionBase.System.Collections.IList.Add(Object value) +83
   EPiServer.Common.Security.UserCollection.Add(IUser user) +44
   EPiServer.Community.Web.Administration.ContestInfoControl.dataListSubmissions_UpdateCommand(Object source, DataListCommandEventArgs e) +249
   System.Web.UI.WebControls.DataList.OnBubbleEvent(Object source, EventArgs e) +11101186
   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +70
   System.Web.UI.WebControls.DataListItem.OnBubbleEvent(Object source, EventArgs e) +96
   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +70
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +29
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2981

Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927

Is this a bug?

#38058

Mar 28, 2010 20:05

Karoline Klever

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I just tried this out on a test site running CMS R2 SP2 and Community 3.2 SP1 (with hotfix 1 and 2), and I got the same error.

Seems to be a bug in the EPiServer.Community.Web.Administration.ContestInfoControl.dataListSubmissions_UpdateCommand method where a User is added to a readonly UserCollection (instead of the UserCollection being cloned before adding the User, which would be the correct way of doing it). Could this be the case?

#38060

Mar 29, 2010 9:37

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Yes, this is a known issue. I don't think the fix has yet been released as port of a public update, but Support has a fix available.

http://world.episerver.com/Support/Register-Support-Incident/

#38100

Mar 29, 2010 20:30

error This thread is locked and should be used for reference only. Please use the Legacy add-ons forum to open new discussions.