Hi Robert,

Have you tried to follow our sample about unbound WebGrid? It should be working fine if you follow our sample. But if the problem still occurs, please tell me more details so that I can replicate your issue. Did you call any function in your unbound WebGrid?

When you operate an unbound WebGrid, all the databound features should be disabled and flypostback process as well.

Regards,
Lili Khiung

Hi Lily,

Thanks for your reply - happily I've now got past the exception in RenderControl.

I've been working from the Hierarchical_Unbound_Programmatic tutorial, and a straight run through works fine.  The problem arises when I try to integrate into our project environment, building the control on demand and picking up the data structure and data from our data objects - it was hard to tell what was causing the crash in RenderControl.  It turns out that I was giving more values in the data array (table.Rows.AddRange) than there were columns in the table; once the right number of values are provided, I get through RenderControl OK. 

Regards,

Robert