Easy way to add a Label to the WPF ComboBox control

Question

This code is becoming more common in my application:

<StackPanel Orientation="Vertical">
    <Label Content="_ComboBox Caption" 
           Target="comboBox" 
           Margin="0" 
           Padding="5,5,5,1" />

    <ComboBox  x:Name="comboBox"
                Width="72"
                Margin="5,0,5,5"
                Padding="5,1,5,5"
                SelectedItem="{Binding ComboSelectedItem}"
                ItemsSource="{Binding ComboSourceList}" />
</StackPanel>

It renders me a Captioned ComboBox.

I would like to make me a custom control that is a ComboBox that exposes the Label's content and then sets the other properties up. Something that could be used like this:

<Controls:CaptionedComboBox  x:Name="comboBox"
                             Width="72"
                             LabelContent="_ComboBox Caption"
                             SelectedItem="{Binding ComboSelectedItem}"
                             ItemsSource="{Binding ComboSourceList}" />

However, I looked into making a custom control and there is a daunting amount of styling that is needed.

Is there a way to take what I have above and end up doing something like this?

<StackPanel Orientation="Vertical">
    <Label Content="{Binding TemplateLabelContent}" 
           Target="{Binding ControlName}" 
           Margin="0" 
           Padding="5,5,5,1" />

    <InheritedComboBoxStuff/>

</StackPanel>

I know that will not work. But my point is that is seems silly that I have to re-style the whole ComboBox just to add a label above it.

Answer 1

You can make a template for that

  <ControlTemplate x:Key="ComboWithHeader" TargetType="ContentControl">
        <StackPanel Orientation="Vertical">
            <Label Margin="0"
                   Content="{Binding ComboBoxHeader}"
                   DataContext="{TemplateBinding DataContext}"
                   Padding="5,5,5,1"
                   Target="comboBox" />

            <ComboBox x:Name="comboBox"
                      Width="72"
                      Margin="5,0,5,5"
                      DataContext="{TemplateBinding DataContext}"
                      ItemsSource="{Binding ComboSourceList}"
                      Padding="5,1,5,5"
                      SelectedItem="{Binding ComboSelectedItem}" />
        </StackPanel>
    </ControlTemplate>

And then whenever you want to use combo with header, just use

<ContentControl Template="{StaticResource ComboWithHeader}" DataContext="{Binding ComboBoxViewModel}" />

Answer 2

Really basic but oh so simple, you can also create a UserControl, and then embed your control anywhere you want to as well. eg

<UserControl x:Class="xxx.View.TestResultsGraph"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" 
         MinHeight="50"
         d:DesignHeight="50" d:DesignWidth="300" >

    <Canvas Name="canvas" >
        <Polygon x:Name="SuccessShape" Fill="#FFF0FFF0" SnapsToDevicePixels="True"   />
        <Polyline x:Name="SuccessLine" Stroke="Green"    StrokeThickness="0.5" SnapsToDevicePixels="True"   />
        <Polygon x:Name="FailShape" Fill="#FFFFF0F0" SnapsToDevicePixels="True"   />
        <Polyline x:Name="FailLine" Stroke="Red"  StrokeThickness="0.5" SnapsToDevicePixels="True"      />
        <Polygon x:Name="PendingShape" Fill="#FFFFF0E0" SnapsToDevicePixels="True"   />
        <Polyline x:Name="PendingLine" Stroke="DarkOrange" StrokeThickness="0.5" SnapsToDevicePixels="True"    />
        <Line x:Name="xAxis" Stroke="Black" StrokeThickness="0.5" SnapsToDevicePixels="True"  />
        <Line x:Name="yAxis" Stroke="Black" StrokeThickness="0.5" SnapsToDevicePixels="True" />
    </Canvas>