I found out that Insert, Edit and Delete in a RadGrid works only when you use Advanced Data Binding. Sadly I donĀ“t find any example of this in the sample/tutorials. Maybe someone can link me an example???
In the examples for "Data Editing" in Grid there is only an example with CRUD Operations and nothing with the Advanced Data Binding.
http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/automatic-crud-operations/defaultcs.aspx
Thanks
J.
other links I found this mentioned informations.
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/data-binding/understanding-data-binding/server-side-binding/advanced-data-binding-(using-needdatasource-event)
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/data-binding/understanding-data-binding/server-side-binding/advanced-data-binding-(using-needdatasource-event)