Trying to put DataGrid and Rectangle in a Grid problem

Question

Hi,

I have a layout problem. In a TabItem my idéa is to put a Rectangle with a Height="50" at the very top and just below, I will put a datagrid.

So I have tried to use a Grid and put 2 RowDefinitions and put the Rectangle on Grid.Row="0" and the DataGrid on Grid.Row="1". It works when starting up the project but in Blend I cant see the rectangle. I wonder I missing something out here?

            <controls:TabItem Header="Tab1" Foreground="Black" Background="Gray" FontSize="12" Opacity="0" >

                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="50"/>
                        <RowDefinition Height="Auto"/>
                    </Grid.RowDefinitions>



                    <Rectangle Height="50" Grid.Row="0" Grid.Column="0" Fill="Green">
                    </Rectangle>


                    <data:DataGrid x:Name="Grid1" Grid.Row="1" Grid.Column="0" CanUserReorderColumns="False" CanUserSortColumns="False" Height="Auto" RowHeight="18" GridLinesVisibility="All" 
Background="Black" FontSize="11" AutoGenerateColumns="False" RowBackground="Black" 
                                   HorizontalGridLinesBrush="#FF141414" VerticalGridLinesBrush="#FF141414" Foreground="White" BorderBrush="Gray"  BorderThickness="0.2" VerticalAlignment="Top" Margin="-5,-5,-5,0"   >
                    <data:DataGrid.Columns>
                        
                        <data:DataGridTemplateColumn>
                            <data:DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <StackPanel Height="22" Background="Transparent">
                                        <TextBox Text="{Binding gtNum}" BorderThickness="0"  Background="{Binding gtNumColor}" FontSize="11" Foreground="White" IsReadOnly="True" IsEnabled="False"></TextBox>
                                    </StackPanel>
                                </DataTemplate>
                            </data:DataGridTemplateColumn.CellTemplate>
                        </data:DataGridTemplateColumn>

                    </data:DataGrid.Columns>
                </data:DataGrid>
                </Grid>
            </controls:TabItem>

Answer 1

Strangely it seems that is appeared in Blend. So I think this is solved.

Answer 2

follow the sample

<UserControl              
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:controls="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls"
    xmlns:data="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data" mc:Ignorable="d"                 
             x:Class="SilverlightApplication1.MainPage"
    d:DesignHeight="300" d:DesignWidth="400" Height="600" Width="1000">  

    <Grid x:Name="LayoutRoot" >   
        <controls:TabControl >
            <controls:TabItem Header="First Item">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*"></RowDefinition>
                        <RowDefinition Height="10*"></RowDefinition>
                    </Grid.RowDefinitions>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*"></ColumnDefinition>
                    </Grid.ColumnDefinitions>
                    <Rectangle Height="50" Grid.Row="0" Grid.Column="0" Fill="Green">
                    </Rectangle>
                    <data:DataGrid x:Name="DtGrid" Grid.Row="1" Grid.Column="0" AutoGenerateColumns="False" SelectionChanged="DtGrid_SelectionChanged"    >
                        <data:DataGrid.Columns>
                            <data:DataGridTextColumn Header="Name" Binding="{Binding Name}"/>
                            <data:DataGridTextColumn Header="Designation" Binding="{Binding Designation}"/>
                            <data:DataGridTextColumn Header="Dept" Binding="{Binding Dept}"/>
                        </data:DataGrid.Columns>
                    </data:DataGrid>
                </Grid>
            </controls:TabItem>
        </controls:TabControl>
    </Grid>
</UserControl>