Image binding

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Hi,
I'm trying to customize combobox, I edited its template so I can always display an image in the header of the combobox, I managed this by putting Image instead of ContentPresenter in the template, but its a template and I will create number of comboboxes from it and each have its own image, HOW I can manage that, with each new combobox i can set its own image??
(sorry for my English!):

XML

<ControlTemplate TargetType="ComboBox" x:Key="CustomBTemplate">
  <Grid>
    <Border x:Name="ContentPresenterBorder">
      <Grid>
        <ToggleButton x:Name="DropDownToggle" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="-1" HorizontalContentAlignment="Right">
          <Path x:Name="BtnArrow" Height="4" Width="8" Stretch="Uniform" Margin="0,0,6,0" Fill="Black"
Data="F1 M 300,-190L 310,-190L 305,-183L 301,-190 Z " />
        </ToggleButton>
        <Image Width="35" Height="35" Source="somepicture.png" HorizontalAlignment="Left"/>
      </Grid>
    </Border>
    <Popup x:Name="Popup">
      <Border x:Name="PopupBorder" HorizontalAlignment="Stretch" Height="Auto" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="Black" Background="White" CornerRadius="3">
        <ScrollViewer x:Name="ScrollViewer" BorderThickness="0" Padding="1">
          <ItemsPresenter/>
        </ScrollViewer>
      </Border>
    </Popup>
  </Grid>
</ControlTemplate>

Posted 28-May-10 5:35am

Lana_

Updated 8-Jul-10 3:38am

Kunal Chowdhury «IN»

v3

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Andrew Rissing · Accepted Answer · 2010-05-28T05:54:00

Solution 1

You need to create an AttachedDependencyProperty that you'll apply to the top level of the ComboBox and then in your ControlTemplate you'll bind to with something like:

XML

<Image Width="35" Height="35" Source="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(y:MyClass.ComboImage)}" HorizontalAlignment="Left"/>

You can find something very similiar dealing with brushes in my tip here.[^].

Posted 28-May-10 5:54am

Andrew Rissing

Comments

Andrew Rissing 28-May-10 11:55am

By the way, since you're working in Silverlight, you might want to look at the tip regardless as it deals with some issues Silverlight has with attached dependency properties.