Hi Sina,
Thanks for using Syncfusion products. Only if the ItemsSource is null you would see an empty rectangle. I would like to know the way you bind to the ItemsSource and also the Set you use. Currently all IEnumerable source type is supported in the GridDataControl.
Please check the following sample which binds through the DataContext,
http://www.syncfusion.com/uploads/redirect.aspx?file=CS_cea18ed7.zip&team=developmentRegarding the MappingName, it is the exact reference name of the property you define in you business object. Say, a Person class has Name and Desig properties, then the MappingName should exactly match these values.
Let me know if that helps you out.
Thanks,
Fahad
Grid.WPF TeamSyncfusion Inc.,