On the links below you will find information about ObjectDataSource and how RadGrid is using any data source control:
Automatic DataSource operations
Regarding the issue which David has: GridBoundColumn with DataField DivisionID must be marked as ReadOnly=true instead.
This will resolve the problem.
Attached to this forum post you will find a sample project which illustrates another possible way to bind RadGrid via ObjectDataSource
without need to specify any parameter for select/update/insert/delete.
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