C# and XAML Windows Store App How change textBlock data?

Question

Can I change the values of textBlockZona in DataTemplate? I need to create a dynamic header list, how can I change myTEXT content in the code?

<Page.Resources>
        <DataTemplate x:Key="HeadTemplate">
            <Grid
                Width="745" Height="61" HorizontalAlignment="Left" VerticalAlignment="Top" AllowDrop="True" Background="Transparent">

                <Grid
                    x:Name="gridZona" Width="122" Height="36" Margin="0,10,0,0" HorizontalAlignment="Left" VerticalAlignment="Top">
                    <Rectangle x:Name="ZonaButton" Fill="#FF2994FF" />
                    <TextBlock
                        x:Name="textBlockZona" Margin="0,0,0,0" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="14" FontWeight="Bold" Foreground="White"
                        Text="MYTEXT"
                        TextAlignment="Center" TextWrapping="Wrap" d:LayoutOverrides="TopPosition, BottomPosition" />
                </Grid>

        </DataTemplate>

        <DataTemplate x:Key="ViewTemplate">
            <local:PosItemViewer />
        </DataTemplate>

    </Page.Resources>

    <ListView        x:Name="RigheView" Grid.Row="1" Width="744" Height="867" Margin="10,203,0,0" HorizontalAlignment="Left" VerticalAlignment="Top"
                ContainerContentChanging="RigheView_ContainerContentChanging"
                HeaderTemplate="{StaticResource HeadTemplate}"
                IsItemClickEnabled="True"
                ItemTemplate="{StaticResource ViewTemplate}"
                SelectionMode="None" />

attention to HeaderTemplate="{StaticResource HeadTemplate}" – Cristian May 22 '17 at 15:09 — Cristian, May 22 '17 at 15:09

mm8 · Accepted Answer · 2017-05-22T15:10:53.253

-1

You should bind the Text property of the TextBlock to a property of the type T in the IEnumerable<T> that you have set as the ItemsSource of the ListView:

<TextBlock x:Name="textBlockZona" Text="{Binding YourTextProperty}" Margin="0,0,0,0" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="14" FontWeight="Bold" Foreground="White" TextAlignment="Center" TextWrapping="Wrap" d:LayoutOverrides="TopPosition, BottomPosition" />

Then you can simply set this property to any string you want and have the TextBlock being automatically updated provided that the type T implements the INotifyPropertyChanged interface: https://msdn.microsoft.com/en-us/library/system.componentmodel.inotifypropertychanged(v=vs.110).aspx.

This is the only correct way of doing this. You don't modify a template that you have defined in your XAML markup programmatically.

Edit: A TextBlock in the HeaderTemplate should be bound to a property in the view model, i.e. the DataContext of the ListView itself, the same way.

edited May 22 '17 at 15:10

answered May 22 '17 at 14:49

mm8

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But header properties have nothing to do with the element list. attention to HeaderTemplate="{StaticResource HeadTemplate}" – Cristian May 22 '17 at 15:08
See my edited answer. – mm8 May 22 '17 at 15:11
Could you give me an small example? – Cristian May 22 '17 at 15:15
I understand, and I solved the problem thanks to your help. – Cristian May 22 '17 at 15:24
1

ok thanks again ;) – Cristian May 22 '17 at 15:46

C# and XAML Windows Store App How change textBlock data?

1 Answers1