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In this template I subscribed for the OnClientLoad event of RadComboBox control. This is because I need to remove one of the providers that are populated in the custom control on the server. I have to remove the Libraries provider, because it uses binary data. You can remove the provider from the list if you add a condition inside the "if" check in the GCProviders method, like:
if (provider !=null && provider.Name != "Libraries")
The custom control:
Here I inherited from the SimpleControl class and overrode the LayoutTemplatePath. Here I set the path to my template which has RadGrid, RadComboBox, RadAjaxManagerProxy and RadAjaxLoadingPanel declarations. I created a new property for the provider name which gets the value from the RadComboBox SelectedItem.
Inside InitializeControls I bound the RadCombobox and subscribed for RadGrid's events - PreRender, UpdateCommand, DeleteCommand, NeedDataSource, InsertCommand
As some of the providers like GenericContent and Wiki have different metakeys for the "Title", I had to dynamically change the GridBoundColumn value inside Grid's PreRender event handler and then rebind the grid.
To check the provider I created a helper method, whose value I passed inside the Insert, Update, Delete event handlers.
You can find the complete code below:
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