CODEWITHSUNDEEP
wpfdatatemplate
rogdawg
rogdawg

Reputation: 687

I can't seem to get a DataTemplate to work in WPF

I have tried several different ways to get a simple DataTemplate example to work. But, I am not having any luck. The data context for the XAML below is being set in the code-behind. The two code examples included here are wrapped in the element in my application but, that is the only outside consideration. The first code example works. It displays the data. But, if I put the functionality in a DataTemplate, and then try to use the template, it does not work.

Working Example:

    <Canvas Height="100" Width="300">
        <TextBlock Text="{Binding Path=DataSheet.Item.ClassId}" Canvas.Left="10"></TextBlock>
        <TextBlock Text="{Binding Path=DataSheet.Item.ClassName}" Canvas.Right="100"></TextBlock>
    </Canvas>

Example that DOES NOT work (but, no error is thrown):

<Window.Resources>
    <DataTemplate x:Key="FirstTemplate">
        <Grid Margin="4">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" SharedSizeGroup="Key" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <TextBox Text="{Binding ClassId}"></TextBox>
            <TextBox Text="{Binding ClassName}"></TextBox>
        </Grid>
    </DataTemplate>
</Window.Resources>
<Grid>
    <ListBox ItemsSource="{Binding Path=DataSheet.Item}" Grid.IsSharedSizeScope="True"
             HorizontalAlignment="Stretch"
             ItemTemplate="{StaticResource ResourceKey=FirstTemplate}"/>
</Grid>

Any advice as to what I am doing wrong would really be appreciated.

Thanks.

Upvotes: 3

Views: 459

Answers (3)

Alex Zhevzhik
Alex Zhevzhik

Reputation: 3397

Your ItemSource should be a collection meanwhile DataSheet.Item looks like a single item. You should wrap it into collection.

Or you could manually add ListBoxItem. 

<ListBox>
    <ListBoxItem Content="{Binding DataSheet.Item}" ContentTemplate="{StaticResource FirstTemplate}"/>
</ListBox>

Upvotes: 4

krishnaaditya
krishnaaditya

Reputation: 860

From the working code you have presented, I am assuming that DataSheet.Item is not IEnumerable. If it is not IEnumerable binding it to ListBox.ItemsSource doesn't seem appropriate.

Upvotes: 0

mdm20
mdm20

Reputation: 4563

Try this:

  <ListBox ItemsSource="{Binding Path=DataSheet.Item}" Grid.IsSharedSizeScope="True"
             HorizontalAlignment="Stretch"
             ItemTemplate="{StaticResource FirstTemplate}"/>

Here's a link for more info

Upvotes: -1

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