[Solved] Binding doesn't work in GroupBox HeaderTemplate

[Alexandre]

Hi,

Binding doesn't seem to work in the HeaderTemplate of the GroupBox control.

I can bind the Header property but not the content in HeaderTemplate. The header is blank.

Here is my XAML:

<UserControl x:Class="SilverlightApplication4.MainPage"
    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:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

  <Grid x:Name="LayoutRoot" Background="White">
    <telerik:GroupBox Margin="10">
      <telerik:GroupBox.HeaderTemplate>
        <DataTemplate>
          <TextBlock Text="{Binding sHeader}" />
        </DataTemplate>
      </telerik:GroupBox.HeaderTemplate>
    </telerik:GroupBox>
  </Grid>
</UserControl>

Here is the code behind:

using System.Windows.Controls;

namespace SilverlightApplication4
{
  public partial class MainPage : UserControl
  {
    public string sHeader { get; set; }

    public MainPage()
    {
      InitializeComponent();

      sHeader = "My Header";
      this.LayoutRoot.DataContext = this;
    }
  }
}

The header doesn't appear.

If I use the Header property instead of the HeaderTemplate, it works:

<UserControl x:Class="SilverlightApplication4.MainPage"
    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:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

  <Grid x:Name="LayoutRoot" Background="White">
    <telerik:GroupBox Margin="10" Header="{Binding sHeader}">
    </telerik:GroupBox>
  </Grid>
</UserControl>

Also If I bind to a static resource it works.

Is this an issue or a normal behavior?

Eventually I will have to use the HeaderTemplate property to set a more complex header.

Thanks,

Alex

[Alexandre]

Ok. Found it. It's my mistake. I should have used the Header property and not the HeaderTemplate property.

<telerik:GroupBox>
  <telerik:GroupBox.Header>
    <StackPanel>
      <TextBlock Text="{Binding sHeader}" />
    </StackPanel>
  </telerik:GroupBox.Header>
</telerik:GroupBox>

Thanks anyway.

Alex