Im using a grid in a data template and want one of the columns to expand as wide. This data template is used in a data grid row and I need the columns to the right to always be in alignment. the screenshot below will demonstrate what I don't want.
And here's the xaml for the grid
<DataTemplate><Grid HorizontalAlignment="Stretch" Height="50" Background="Transparent" Width="Auto"><Grid.RowDefinitions><RowDefinition /><RowDefinition/></Grid.RowDefinitions><Grid.ColumnDefinitions><ColumnDefinition Width="40" /><!-- THIS COLUMN NEEDS TO EXPAND ALL THE WAY TO THE RIGHT, BUT IT DOESN'T--><ColumnDefinition Width="Auto" /><ColumnDefinition Width="30" /></Grid.ColumnDefinitions><Image Grid.RowSpan="2" Source="{ Binding Path=., Converter={StaticResource imgConverter}}" Stretch="None" /><TextBlock Grid.Column="1" Text="{Binding FS_FileName}" TextWrapping="Wrap" VerticalAlignment="Bottom" FontSize="12" Foreground="#FF444444" FontWeight="Bold" /><TextBlock Grid.Column="1" Grid.Row="1" Text="{Binding UserStampAndFileSize}" TextWrapping="Wrap" VerticalAlignment="Top" Foreground="#FF444444" /><!--THIS IS THE BUTTON THAT NEEDS TO BE ALINGED ON THE VERY RIGHT SIDE OF THE CONTROL--><Button x:Name="btnOpenFile" Grid.Column="2" Grid.RowSpan="2" HorizontalAlignment="Center" VerticalAlignment="Center" Content="O" Click="btnOpenFile_Click" ToolTipService.ToolTip="Open this attachment" /></Grid></DataTemplate>Thank you for any help you can offer.