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sam
130
Rebinding Data to grid in updatecell - Exception
posted

I am using the latest ultrawebgrid & asp.net3.5

I have an object data source(list), bind it to a simple grid using InitializeDS(Not in a WARP, AJAX enabled )

The grid has check boxes, I am handling updatecell to track the state of the checks.

I  update the Database in updatecell depending on the state of the checks and have to reload the grid.

I am trying to assign the updated DS to the grid and call DataBind in UpdateCell.

Running into the following exception:

[NullReferenceException: Object reference not set to an instance of an object.]
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.UpdateDBRow(UltraGridRow row, UltraGridRow oldRow) +155
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.ProcessChanges(StateChanges stateChanges, Boolean fireEvents) +1559
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.RaisePostDataChangedEvent() +161
   System.Web.UI.Page.RaiseChangedEvents() +165
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1485

 

I tried setting the DS to null and binding to a null DS( came across these in the forums)

 

Any thoughts or ideas why this is happening? 

thanks,

sam

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  • 45049
    posted

    There are too many things that could cause a NullReferenceException in particular circumstances - and most of them would be expected.  We'll likely need to inspect a sample project to determine what is causing the issue here, and determine how to prevent it from happening.

    I suggest that you submit a support request and attach a sample project that we can run and debug that demonstrates this exception.  We can then use this sample to determine why this is happening.  If you need to use a database, connect to the Northwind database, either in Access or SQL Server.

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