Thank you for your interest in DataGrid for Xamarin.
Indeed, currently the only built-in approach to retrieve more data in DataGrid is through the load-on-demand mechanism. Still, you could manually achieve some sort of paging by updating the ItemsSource of the DataGrid. In short, you could keep a track of the currently loaded items and on button click load the next ones from a collection containing all the items. I have attached a sample app to show you how this would work.
Please download the attachment and give it a try.
Let me know if you have any additional questions on this.
Regards,
Yana
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