Cannot get TextBlock to word wrap inside a ListBox

Question

I am having trouble getting the text in a TextBlock to wrap. The TextBlock is inside a Grid, which is part of a ListBoxItem template. Below is my XAML:

  <ListBox Grid.Row="2" ScrollViewer.HorizontalScrollBarVisibility="Disabled" HorizontalAlignment="Center" VerticalAlignment="Top" Height="600" Width="600" Name="lb_TestResults" ItemsSource="{Binding Test}" Margin="5,5,5,5">
        <ListBox.ItemContainerStyle>
            <Style TargetType="ListBoxItem">
                <Setter Property="HorizontalContentAlignment" Value="Stretch"></Setter>
            </Style>
        </ListBox.ItemContainerStyle>
        <ListBox.ItemTemplate>
            <DataTemplate>
                <Border BorderBrush="DarkGray" BorderThickness="1" Padding="4">
                    <Grid Width="auto">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="auto"></RowDefinition>
                            <RowDefinition Height="auto"></RowDefinition>
                            <RowDefinition Height="auto"></RowDefinition>
                            <RowDefinition Height="auto"></RowDefinition>
                        </Grid.RowDefinitions>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="auto"/>
                            <ColumnDefinition Width="auto"/>
                        </Grid.ColumnDefinitions>
                                <TextBlock Name="tb_nameLabel" Margin ="0, 0, 3, 0" FontSize="15" FontFamily="Verdana" Grid.Row="0" Grid.Column="0"><Bold>Test: </Bold></TextBlock>
                                <TextBlock Name="tb_Name" Text="{Binding Name}" FontSize="15" FontFamily="Verdana" Grid.Row="0" Grid.Column="1"></TextBlock>
                                <TextBlock Name="tb_descLabel" Margin="0, 0, 3, 0" TextWrapping="Wrap" Grid.Row="1" Grid.Column="0"><Bold>Description: </Bold></TextBlock>
                                <TextBlock Name="tb_Description" Text="{Binding Description}" Grid.Row="1" Grid.Column="1" ></TextBlock>
                                <TextBlock Name="tb_statusLabel" Margin="0, 0, 3, 0" Grid.Row="2" Grid.Column="0"><Bold>Status: </Bold></TextBlock>
                                <TextBlock Name="tb_Status" Text="{Binding Status}" Grid.Row="2" Grid.Column="1"></TextBlock>
                                <TextBlock Name="tb_resultLabel" Margin="0, 0, 3, 0" Grid.Row="3" Grid.Column="0"><Bold>Result: </Bold></TextBlock>
                                <TextBlock Name="tb_Result" Text="{Binding Result}" Grid.Row="3" Grid.Column="1"></TextBlock>
                    </Grid>
                </Border>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

I originally had the TextBlocks inside StackPanels, but reading various other questions on this topic such as this , I decided to change it to a Grid. I only need the TextBlock tb_Description to word wrap. Right now the output looks like this:

As you can see the text is not wrapping.

I have tried setting the width explicitly on the TextBlocks, the Grid columns, and the ListBox, but nothing has helped so far. I also disabled the horizontal scrollbar, the scrollbar is gone now but the text is still trailing off the edge. Any ideas?

Answer 1

The problem is not with the ListBox but with the Grid you are using to align text blocks. Both columns are set to Auto which results in Grid allowing columns to occupy all space their content requests for.

You need to set Width of the second ColumnDefinition to * :

<Grid.ColumnDefinitions>
    <ColumnDefinition Width="Auto"/>
    <ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>

Answer 2

Hi you must set the 2nd column to * so it stretches and you have swapped the TextBlock that should wrap, just a "typo" :)

Change

<Grid.ColumnDefinitions>
    <ColumnDefinition Width="auto"/>
    <ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>   

 <!-- And these here you have set the wrong textblock to wrap =) -->
<TextBlock Name="tb_descLabel" Margin="0, 0, 3, 0" TextWrapping="Wrap" Grid.Row="1" Grid.Column="0"><Bold>Description: </Bold></TextBlock>
<TextBlock Name="tb_Description" Text="{Binding Description}" Grid.Row="1" Grid.Column="1" ></TextBlock>

To

<Grid.ColumnDefinitions>
    <ColumnDefinition Width="auto"/>
    <ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<!-- ..... -->

<TextBlock Name="tb_descLabel" Margin="0, 0, 3, 0" Grid.Row="1" Grid.Column="0"><Bold>Description: </Bold></TextBlock>
<TextBlock Name="tb_Description" Text="{Binding Description}" Grid.Row="1" Grid.Column="1" TextWrapping="Wrap"></TextBlock>

Result

Cheers!