NullReferenceException when binding to NetTiers DataSource with 2008.3

478

Duncan King posted over 15 years ago

Having upgraded to 2008.3, I'm now getting a NullReferencException when declaritively binding a grid to a NetTiers DataSource object. This worked fine in 2008.1, and the DataSource object hasn't changed. What's going on?

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.GetHierarchicalDataSourceView() +271
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.DataBind() +154
   System.Web.UI.WebControls.BaseDataList.EnsureDataBound() +60
   System.Web.UI.WebControls.BaseDataList.OnPreRender(EventArgs e) +15
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.OnPreRender(EventArgs e) +92
   System.Web.UI.Control.PreRenderRecursiveInternal() +80
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

45

Francesc Valenzuela posted over 15 years ago in reply to Duncan King

Hi gregorach,

I'm starting to use nettiers for a web application and I want to use infragistics controls. Could you send me some sample templates of your web site?

Thanks in advance.
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Offline Duncan King posted over 15 years ago in reply to Alex Kartavov

Yep, that does the trick. Thank you very much for your prompt assistance.
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Offline Alex Kartavov posted over 15 years ago in reply to Alex Kartavov

If you override GetViewNames() method in your data source and return an
array of strings, it should be fine after that. The array can contain a
single empty string item.
It'll be fixed in January hot fix.
Thank you for your report.
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Offline Alex Kartavov posted over 15 years ago in reply to Alex Kartavov

Sorry, didn't notice that there is a sample with it. Will get back to
you on that in a short while. Thanks.
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Offline Alex Kartavov posted over 15 years ago in reply to Duncan King

I see your support ticket is coming through. Unfortunately there is
nothing I can do at this point... Can you somehow gather more info about
the conditions when that happens? How many bands do you have. Does it
happen with # of bands>2 or all the time?
Is it possible to enable debugging info for the data source? It'd be
helpful to get full stack trace, as with this one it's impossible to say
whether it fails in the grid or in the DS somewhere.
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