CODEWITHSUNDEEP
c#wpfxamlmvvm
Nekeniehl
Nekeniehl

Reputation: 1691

ControlTemplate on Style WPF / MVVM

I'm trying to figure out how to define a ControlTemplate for all the textboxes I have in my UserControl, I have tried several things but doesn't seems to work.

What I need is bind the KeyBinding to a Command:

<TextBox.InputBindings>
      <KeyBinding Key="Enter" Command="{Binding SaveConfigCommand}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=TextBox}}"/>
</TextBox.InputBindings>

this is working so far, but adding the same snippet to all the textboxes it's not a good practice. So I tried to put it on the Styles but I get NullReferenceException

<Setter Property="Template">
    <Setter.Value>
        <ControlTemplate TargetType="TextBox">
            <Grid>
                <TextBox Text="{TemplateBinding}"/>
                <ContentPresenter>
                    <ContentPresenter.InputBindings>
                        <KeyBinding Key="Enter" Command="{Binding SaveConfigCommand}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=TextBox}}"/>
                    </ContentPresenter.InputBindings>
                </ContentPresenter>
            </Grid>
        </ControlTemplate>
    </Setter.Value>
</Setter>

Any ideas? Thanks in advance!

Edit for future references: Although the answer is correct, I would like to point out that the TemplateBinding Text it is not enough when you are already binding the Text property in the control, as the TemplateBinding is only a OneWay Binding, you have to use the following:

Text="{Binding Text, RelativeSource={RelativeSource TemplatedParent}}"

Upvotes: 2

Views: 1087

Answers (1)

Rekshino
Rekshino

Reputation: 7325

TemplateBinding is used for binding to the control properties within the template definition. Further put your InputBindings to the TextBox. 

<Style x:Key="tbxStyle" TargetType="TextBox">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="TextBox">
                        <Grid>
                            <TextBox Text="{TemplateBinding Text}">
                                <TextBox.InputBindings>
                                    <KeyBinding Key="Enter" Command="{Binding SaveConfigCommand}" CommandParameter="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=TextBox}}"/>
                                </TextBox.InputBindings>
                            </TextBox>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

<TextBox Text="{Binding SelectedItem}" Style="{StaticResource tbxStyle}">

Upvotes: 1

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