How to change WPF ComboBox SelectedText BackGround Color?

Question

I have a Combobox in WPF-MVVM and i have styled the combobox with changes in the popdown box and textbox of combobox.

When i scroll the combobox listitem thier background is pink is what i have chnaged. But after selecting a item from the combobox list, the selected value in combobox item has blue background. which is the default for a combobbox in both Windows Form and WPF.

See the image for more details.

How can i change that selectedtext background color in the combobox textbox control

The combobox has

IsEditable=True property set

Answer 1

You can do this:

<ComboBox.Resources>
    <!--Selected color when the ComboBox is focused-->
    <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Yellow" />
    <!--Selected color when the ComboBox is not focused-->
    <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="Yellow" />

    <!--selected text-->
    <SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Yellow" />
</ComboBox.Resources>

(tested on ListBox but should work)

Another way is setting the ItemContainerStyle property of the ComboBox, and have a trigger depended on the current ComboBoxItem selection state:

<ComboBox>
  <ComboBox.Resources>
    <Style TargetType="TextBlock">
      <Style.Triggers>
        <DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=ComboBoxItem}}" Value="True">
          <Setter Property="Foreground" Value="White" />
        </Trigger>
      </Style.Triggers>
    </Style>
  </ComboBox.Resources>
  <ComboBox.ItemContainerStyle>
    <Style TargetType="ComboBoxItem" x:Key="ContainerStyle">
      <Style.Triggers>
        <Trigger Property="IsSelected" Value="True">
          <Setter Property="Background" Value="Red" />
        </Trigger>
      </Style.Triggers>
    </Style>
  </ComboBox.ItemContainerStyle>    
</ComboBox>