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Dipti
486
WebCombo In Ultrawebgrid causes page crash
posted

Hi,

 I am using unbound ultrawebgrid with one of the columns as webcombo. User is supposed to put values in editable columns & select value from webcombo column or enter text in it. Then he click on the server side button to save the entered data.

But when user clicks on webcombo column & does not enter any custom text or does not select any value from the list & try to save the date, the page crashes saying the following:

System.NullReferenceException: Object reference not set to an instance of an object.
   at Infragistics.WebUI.UltraWebGrid.UltraWebGrid.ResolveCellLevel(String level, String dataKey)
   at Infragistics.WebUI.UltraWebGrid.UltraWebGrid.StateChangeProcessor.ProcessChanges()
   at Infragistics.WebUI.UltraWebGrid.UltraWebGrid.ProcessChanges(StateChanges stateChanges, Boolean fireEvents)
   at Infragistics.WebUI.UltraWebGrid.UltraWebGrid.LoadPostData(String postDataKey, NameValueCollection values)
   at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown.
   at System.Web.UI.Page.HandleError(Exception e)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest()
   at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
   at System.Web.UI.Page.ProcessRequest(HttpContext context)
   at ASP.portalpage_quality_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\cabportal\21ab8e8a\bb02ea13\App_Web_8yyksov0.4.cs:line 0
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

 

Please help me on this.

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  • 888
    posted

     A couple questions...

    1. You state that the grid is unbounded - how are you binding the grid?  Are you rebinding it on the postback?
    2. On the postback, does it hit any break points in the OnClick function for the button?  If so - can you provide some of the code for that function?  Also what line does it error out on.
    3. Are you attempting to use any of the AJAX functionality of the grid - or just the traditional postback functionality?
    4. Are you using any other type of AJAX controls around the grid - ie UpdatePanel?

    Thanks

    Chad

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