Solved

WPF DataTemplate Issue

Posted on 2012-12-27
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Last Modified: 2013-02-12
I have a WPF application that uses data templates to bind and format a ListView control. The data templates are also supposed to control the text alignment in the cells of the ListView. Here is an example of one template:

<DataTemplate x:Key="CellID">
     <TextBlock HorizontalAlignment="Center" 
               Text="{Binding Path=ID}"/>
</DataTemplate>

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The problem I am having is that the "center" is not applied, the text is left justified in the textblock, however the binding works correctly and the correct data is displayed.

This template is used like this:

<ListView x:Name="lstCues" Background="{x:Null}" Foreground="#FFD3F506" ItemsSource="{Binding Mode=OneWay}">
	<ListView.View>
		<GridView>
			<GridViewColumn Width="50" Header="Cue ID" CellTemplate="{StaticResource CellID}" />
			<GridViewColumn Width="200" Header="Name" CellTemplate="{StaticResource CellName}"/>
			<GridViewColumn Width="400" Header="Filename" CellTemplate="{StaticResource CellFilename}"/>
		</GridView>
	</ListView.View>
</ListView>

Anyone have ideas why this is not working? I am pretty sure this is how I have done this in the past.

Thanks,
Sid.

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Question by:Sid Price
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8 Comments
 
LVL 55

Assisted Solution

by:Jaime Olivares
Jaime Olivares earned 250 total points
ID: 38725445
Try to wrap the textblock into another element like a Border or any other container:

<DataTemplate x:Key="CellID">
    <Border HorizontalAlignment="Stretch">
        <TextBlock HorizontalAlignment="Center" Text="{Binding Path=ID}" />
    </Border>
</DataTemplate>
0
 

Author Comment

by:Sid Price
ID: 38725462
Thank you for the suggestion. I edited my code but get the same result, the text is not centered:

		<DataTemplate x:Key="CellID">
			<Border HorizontalAlignment="Stretch">
    			<TextBlock HorizontalAlignment="Center" Text="{Binding Path=ID}">
    				<TextBlock.Foreground>
    					<Binding Converter="{StaticResource IDDisplay}" />
					</TextBlock.Foreground>
				</TextBlock> 
			</Border>
		</DataTemplate>

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LVL 55

Expert Comment

by:Jaime Olivares
ID: 38725493
it seems that your itempanel is not being centered, so you may try in addition, at ListView level (not at template level):

<ListView HorizontalContentAlignment="Stretch"  ......
0
 

Author Comment

by:Sid Price
ID: 38725501
I added that but no change:

<ListView x:Name="lstCues" HorizontalAlignment="Stretch" Background="{x:Null}" ItemsSource="{Binding Mode=OneWay}" BorderBrush="{x:Null}" Grid.Row="1">

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LVL 55

Expert Comment

by:Jaime Olivares
ID: 38725505
It is HorizontalContentAlignment and not HorizontalAlignment
0
 

Author Comment

by:Sid Price
ID: 38725582
Sorry. my mistake. Here is the edited code, however it still doesn't work:

<ListView x:Name="lstCues" HorizontalContentAlignment="Stretch" Background="{x:Null}" ItemsSource="{Binding Mode=OneWay}" BorderBrush="{x:Null}" Grid.Row="1">

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Accepted Solution

by:
ramgev08 earned 250 total points
ID: 38829004
you need to override the ListViewItem style in order to stretch its content.

add this to your resources should do the trick

                    <Style TargetType="{x:Type ListViewItem}">
                        <Setter Property="HorizontalContentAlignment"
                                Value="Stretch" />
                    </Style>
0
 

Author Comment

by:Sid Price
ID: 38882743
Thank you ramgev08, that was the final step that got my list view to show a centered column.
Sid.
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