Assign Click Event to Button in WPF ResourceDictionary

Question

Hello,

I keep my theme file (ResourceDictionary) in a separate project. I'm using the following ControlTemplate structure for the DataGrid in my ResourceDictionary:

            <Style TargetType="{x:Type DataGridColumnHeader}">  
  
                <Setter Property="ContentTemplate">  
  
                    <Setter.Value>  
  
                        <DataTemplate>  
  
                            <StackPanel Orientation="Horizontal">  
  
                                <TextBlock Text="{Binding}" Margin="10 5" />  
  
                                <Button x:Name="btnFilter" Content="&#xf0b0;" FontFamily="{StaticResource FontAwesome}" FontSize="16" />  
  
                            </StackPanel>  
  
                        </DataTemplate>  
  
                    </Setter.Value>  
  
                </Setter>  
  
            </Style>  

Where I use DataGrid in the related project, I need to assign a click event to the button named btnFilter above, how can I do this?

Methods like VisualTree do not work very well. Since I have nearly 20 columns in Datagrid, I use horizontal scroll and VisualTree does not see the columns hidden by scroll.

What are the best practices I should follow here?

Answer 1

Hi,@Rezan YILDIZ . Welcome Microsoft Q&A.

A ResourceDictionary can have code behind just like Windows etc. so you could add an event handler and call DragMove from there.
My ResourceDictionary is named Dictionary1.xaml , so i create a new file named Dictionary1.xaml.cs .

The code behind file should then look like this.
217613-find.txt

After that you need to add the x:Class attribute to the Xaml file.

<ResourceDictionary    x:Class="AssignClickEventtoButtoninResourceDictionary.Dictionary1"  
             ...>  
    <Style x:Key="column" TargetType="{x:Type DataGridColumnHeader}">  
        <Setter Property="ContentTemplate">  
            <Setter.Value>  
                <DataTemplate>  
                    <StackPanel Orientation="Horizontal">  
                        <TextBlock x:Name="tb" Text="{Binding}" Margin="10 5" />  
                        <Button x:Name="btnFilter" Content="filter"    Click="btnFilter_Click" FontSize="16" />  
                    </StackPanel>  
                </DataTemplate>  
            </Setter.Value>  
        </Setter>  
    </Style>  
</ResourceDictionary>  

App.xaml:

<Application.Resources>  
        <ResourceDictionary Source="Dictionary1.xaml" />  
    </Application.Resources>  

MainWindow.xaml:

  <Window.DataContext>  
        <local:ViewModel/>  
    </Window.DataContext>  
    <Grid>  
        <DataGrid ItemsSource="{Binding ItemsViewSource.View}" ColumnHeaderStyle="{StaticResource column}" />  
    </Grid>  

The result:

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Answer 2

First of all, thank you for your answer, but there are some problems in implementing this solution.

The style file does not allow me to assign a click event and I cannot access the btnFilter event anyway because my style file is in another project (assembly).

I would be grateful if you could help with these considerations.