Getting "Specified argument was out of the range of valid values." error in hierarchical radgrid while trying to refresh data

[Dev]

Hi,

I am trying to implement hierarchical grid. I am trying to refresh data in hierarchical RadGrid.  RadGrid is working fine when all rows are in collapsed mode.  Where as I am getting "Specified argument was out of the range of valid values." when the one or more nested tables are in expanded mode.
I am getting this error even before Page_Load event is fired.  What could be the possible reasons.

Thanks in advance,
Gafoor.

[Eyup]

Hi Gafoor,

Can you please verify that you are not using DataBind() to bind the grid? Please note that performing complex grid operations such as Inserting, Deleting, Updating, Hierarchy relations, Grouping, Exporting, Paging, Sorting, Filtering, etc. require accommodating appropriate database operations.  Therefore, we suggest you to avoid Simple Databinding and strongly recommend the use of more advanced databinding methods, which automatically handle the aforementioned functions:
Declarative DataSource
Advanced Data Binding

Here is a live demonstration for declarative binding of a hierarchy:
http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/insert-update-delete-hierarchy/defaultcs.aspx
And also programmatic:
http://demos.telerik.com/aspnet-ajax/grid/examples/data-binding/programmatic-hierarchy/defaultcs.aspx

I hope these live samples will prove helpful.

Regards,
Eyup
Telerik