when i am running my project i got the following error, what it means?

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An item with the same key has already been added.

Exception Details: System.ArgumentException: An item with the same key has already been added.

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:

[ArgumentException: An item with the same key has already been added.]
   System.ThrowHelper.ThrowArgumentException(ExceptionResource resource) +51
   System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add) +7460188
   System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value) +11
   Geekees.Common.Utilities.Json.JsonObject.Add(String key, String item) +119
   Geekees.Common.Controls.ASTreeViewHelper.GetNodeJson(ASTreeViewNode node) +1592
   Geekees.Common.Controls.ASTreeViewHelper.GetNodeJson(ASTreeViewNode node) +443
   Geekees.Common.Controls.ASTreeViewHelper.GetNodeJsonString(ASTreeViewNode node) +122
   Geekees.Common.Controls.ASTreeView.GenerateTree() +434
   Geekees.Common.Controls.ASTreeView.OnPreRender(EventArgs e) +163
   System.Web.UI.Control.PreRenderRecursiveInternal() +80
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

how i can resolve this?

Posted 22-Mar-11 19:39pm

honey4bee

Updated 22-Mar-11 19:44pm

Wendelius

v2

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Wendelius 23-Mar-11 1:44am

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Wendelius · Accepted Answer · 2011-03-22T19:48:00

Solution 1

You're trying to add an element to the dictionary twice. If I read the stack correctly there's no your code executing when you get the message so could it be that you have used the same name for two different controls in your page?

Posted 22-Mar-11 19:48pm

Wendelius

Comments

Sergey Alexandrovich Kryukov 23-Mar-11 1:58am

Correct Answer. My 5.
--SA

Wendelius 23-Mar-11 3:49am

Thanks :)

honey4bee 24-Mar-11 3:23am

k accepted

Wendelius 24-Mar-11 12:06pm

If you like you can mark your answer solved. Best regards, mika