WPF - Controltemplate child to access usercontrol's custom dependancy properties

Question

I have a WPF UserControl to which I added a new string dependency property. I want to access that property from another control (Image) within the ControlTemplate defined for the UserControl on it's own XAML page. The string will be set on the Source property of the Image in the ControlTemplate. Setting the property works but the control in the ControlTemplate is not receiving the value. Why would that be?

Here's my code:

public static readonly DependencyProperty ButtonImageSourceProperty = DependencyProperty.Register("ButtonImageSource", typeof(string), typeof(MyControl));

public string ButtonImageSource
        {
            get { return (string)GetValue(ButtonImageSourceProperty); }
            set { SetValue(ButtonImageSourceProperty, value); }
        }

And here's the XAML:

<UserControl.Resources>
        <Style TargetType="custom:MyControl">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="custom:MyControl">
                        <Grid>
                        <ContentPresenter></ContentPresenter>
                            <Image Source="{TemplateBinding ButtonImageSource}" Width="30" Height="30"></Image> <!--Image's source to be set by dependency property-->
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </UserControl.Resources>

score 0 · Accepted Answer · edited May 23 '17 at 12:05

0

Use RelativeSource mode TemplatedParent instead of TemplateBinding like this:

Source="{Binding ButtonImageSource,
                 RelativeSource={RelativeSource Mode=TemplatedParent}}"

For difference between two you can read here and here.

edited May 23 '17 at 12:05

Community

1
1

answered Aug 20 '14 at 17:25

Rohit Vats

79,502
12
161
185

WPF - Controltemplate child to access usercontrol's custom dependancy properties

1 Answers1