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UltraWebGrid Problem


I've got a problem with a project I've updated from v7.2 to v8.1.

 The page consists of a paged Grid with rows each with a single checkbox for each item in the grid. The problem occurs with paging and is as follows.

 Modify a few of the checkbox values by clicking on the rows.

Change the page index.

The grid crashes with the following error:

System.NullReferenceException: Object reference not set to an instance of an object. at Infragistics.WebUI.UltraWebGrid.UltraWebGrid.UpdateDBRow(UltraGridRow row, UltraGridRow oldRow) 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)

This is because the code in the page index changed is basically copied from the online help i.e. it does the following:

grid.RaisePostDataChanged() - Causes a call to UpdateCellBatch()

 grid.PageIndex = e.NewPageIndex()


When calling the databind the above error is generated. 

so I could take out the databind() and this fixes the above error. The question is where do I move this to. Is there any help for how to do this. I'm having a little trouble deciphering the code.



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