I am developing a .net mobile page. I was getting the error page saying the session expired on the mobile. So for the list box (Mobile:SelectionList) that I am using I set EnableViewState=False to solved the problem.
But now, while using EnableViewState=False , I am getting the following error on any button click (mostly clicking a button second time). If I took this flag out the page is okay.
Thanks in anticipation
The error is
Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
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.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index
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.
[ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index]
System.Collections.ArrayList.get_Item(Int32 index) +91
System.Web.UI.MobileControls.MobileListItemCollection.get_Item(Int32 index) +68
System.Web.UI.MobileControls.Adapters.HtmlSelectionListAdapter.LoadPostData(String key, NameValueCollection data, Object controlPrivateData, Boolean& dataChanged) +957
System.Web.UI.MobileControls.SelectionList.System.Web.UI.IpostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) +96
System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +391
I take it your don't use if (!Page.IsPostback()) in your onload.
After you clicked the button, the onload resets/refills the dropdown. Then in the onclick you are trying to access the selecteditem, but
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