Is there any way to display the total number of rows contained in the data source within the paging panel? Please refer to the image attached for clues.
You can set the EnablePaging property to true to show the PagingPanelElement in the RadGridView. You can refer to the following articles for more information about the public API for paging: GridView >> Paging
The PagingPanelElement can be customized and add any additional information that you need. Here is a sample code snippet demonstrating how to add a CommandBarLabel displaying the total number of items:
If you want to update the displayed information in the panel, you can subscribe to the PageChanged event which is fired when the current page is changed.
I attached a sample demo too.
I hope this information helps. Should you have further questions, I would be glad to help.