Rows not visible when DataGrid is inside a StackLayout

[Glareascum]

In my view, I have a normal StackLayout that contains the DataGrid, which I populate dynamically.
Here is the code:

 <ContentPage.Content>
        <StackLayout>
            <dg:DataGrid x:Name="DataGrid" 
                        RowHeight="70" 
                         HeaderHeight="50" 
                         BorderColor="#CCCCCC" 
                         ActiveRowColor="#8899AA"
                         HeaderBackground="#E0E6F8">
                <dg:DataGrid.RowsBackgroundColorPalette>
                    <dg:PaletteCollection>
                        <Color>#F2F2F2</Color>
                        <Color>#FFFFFF</Color>
                    </dg:PaletteCollection>
                </dg:DataGrid.RowsBackgroundColorPalette>
                <dg:DataGrid.RowsTextColorPalette>
                    <dg:PaletteCollection>
                        <Color>Black</Color>
                        <Color>Black</Color>
                    </dg:PaletteCollection>
                </dg:DataGrid.RowsTextColorPalette>
            </dg:DataGrid>
        </StackLayout>
    </ContentPage.Content>

By doing so, only columnheaders are shown, 0 rows. When I remove the Stacklayout, all works good. Is there any motivation behind this? I must have the grid with also other controls inside my view, so I need a StackLayout to organize them all.

Thanks

[akgulebubekir]

You should set some HeightRequest to either DataGrid or StackLayout since they don't know their sizes.