Hello,

This could be an issue in the new version of the grid, or something in the setup/environment. Unfortunately it is very hard to tell based on the description and I am not sure we can figure this out in peer-to-peer forums. I believe that best case to proceed in cases like that is to contact Developer Support directly, if possible, with a small subset of your project reproducing the issue and some info on environment. Developer Support can be reached at:

http://es.infragistics.com/support/

Thank you.

I'm having the same issue on a page that was previously working in 2008.2 since upgrading to 2008.3:

[NullReferenceException: Object reference not set to an instance of an object.]
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.UpdateDBRow(UltraGridRow row, UltraGridRow oldRow) +179
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.ProcessChanges(StateChanges stateChanges, Boolean fireEvents) +1520
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.RaisePostDataChangedEvent() +126
   System.Web.UI.Page.RaiseChangedEvents() +165
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3518

Did you determine a solution for this?

This problem is due to the DataBind() method in Update cell event. Move this to Update Grid and it will work with out any issues. In infragistics 2008 we can perform databind() in updatecell event but infra 2009 deosnt support it!

I have an old project in VS2003, .NET FW 1.1, using Infragistics .NET Advantage 5.3 components. I also work on new projects with VS2008 using .NET Advantage 8.2. All worked well till recently. Recently an error occured inside the UpdateCell eventhandler of a UltraWebGrid in the old 5.3 project. The CellEventArgs somehow lost their content, not having references to Cell object etc. It crashed with "Object reference not set" error while updating the grid to the database. It worked well before, 100%. It may be that something with the Infragistics environment settings interfered with the 5.3. All the dll references of 5.3 vere copied locally, no change. HOWEVER, the above solution helped and I have to admit it was also my fault. In case you are updating a grid, do not call DataBind and watch out for the event calls order. Somehow DataBind was called before the UpdateCell and messed tha parameters. It occurs to me that this might actually be the cause of this problem -- Something recently did change the event handlers calls order!!!

Hi,

I have got the same problem with updating from 8.3 CLR2 build 2009 to 9.1 CLR3.5.

With a hierchiecal grid bound to a dataset with checkboxes at the 3 levels when i am checking a checkboxe it have to check the others hierchiecal boxes.

That's works but i received this error

La référence d'objet n'est pas définie à une instance d'un objet.
   à Infragistics.WebUI.UltraWebGrid.UltraWebGrid.UpdateDBRow(UltraGridRow row, UltraGridRow oldRow)
   à Infragistics.WebUI.UltraWebGrid.UltraWebGrid.UpdateDBRow(UltraGridRow row)
   à Infragistics.WebUI.UltraWebGrid.UltraWebGrid.RaiseCallbackEventHandler(String eventArgument)
   à Infragistics.WebUI.UltraWebGrid.UltraWebGrid.LoadPostData(String postDataKey, NameValueCollection values)
   à System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad)
   à System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Best regards

Hello,

Thanks a lot for sharing the solution in public forums -- much appreciated. Just in case someone else experiences the same problem in the future - here is a link to a similar problem and a solution here

http://forums.infragistics.com/forums/t/15686.aspx