Hey Guys,
I am working since yesterday with xamarin and and xaml. I have a specific layout in my mind and tried this:
!--Mobile-->
-Label Grid.Row="0" x:Name="mLabel" Text="Mobile" HorizontalTextAlignment="Center" FontSize="32"/>
-Grid Grid.Row="1">
--Grid.ColumnDefinitions>
---ColumnDefinition Width="25"/>
---ColumnDefinition Width="10"/>
---ColumnDefinition Width="65"/>
--/Grid.ColumnDefinitions>
--Grid.RowDefinitions>
---RowDefinition Height="" />
--/Grid.RowDefinitions>
--Slider Grid.Row="0" Grid.Column="1" x:Name="mSlider" Maximum="100" Value="75" Minimum="0" ValueChanged="mSlider_ValueChanged" Rotation="-90"/>
--Image Grid.Row="0" Grid.Column="2" VerticalOptions="Start" Source="{local:ImageResource Doja.Images.Battery.png}"/>
-/Grid>
The problem is that the slider is only as long as the 10* width (thats my guess). 
I want it to be as big as the image (the grid cell height)
PS: Can someone explain me how to post Xaml correctly mine disappears?