DataGridView did not show datatable data

i want to show data to datagridview from datatable. But it is not working. Error occured. Error is very general. have not any detailed information. my code is:
XAML:
xmlns:dxg="clr-namespace:DevExpress.XamarinForms.DataGrid;assembly=DevExpress.XamarinForms.Grid"
dxg:DataGridView x:Name="grid">
dxg:TextColumn Caption="documentid"/>
dxg:TextColumn Caption="documentno"/>
dxg:TextColumn Caption="ddate"/>
dxg:TextColumn Caption="amount"/>
dxg:TextColumn Caption="amountwotax"/>
dxg:TextColumn Caption="userid"/>
dxg:TextColumn Caption="uid"/>
/dxg:DataGridView>

CS:
DataTable tbl = DBRes.DT;
grid.ItemsSource = tbl;