How do I change the colour of a WPF Checkbox tick? - c#

I would like to change the colour of the tick in my WPF CheckBox from black to white. I have tried to do this in the CheckBoxdeclaration as such:
<CheckBox Background="black" Foreground="White" BorderBrush="#262626"/>
The background and border successfully change, but not the tick itself.

You could copy the entire checkbox style from the MSDN server but because its very confusing to work with in the beginning of any WPF carreer, I compiled the (in my opinion) neccessary bits into one style thats a little easier to understand:
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Background" Value="White" />
<Setter Property="BorderBrush" Value="#FF262E34"/>
<Setter Property="Foreground" Value="#FF262E34"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type CheckBox}">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Stretch" >
<Border BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" Width="15" Height="15">
<!-- your color here -->
<Path Stretch="Uniform" Width="15" Height="10" Fill="HotPink" Name="eliCheck" Data="F1 M 9.97498,1.22334L 4.6983,9.09834L 4.52164,9.09834L 0,5.19331L 1.27664,3.52165L 4.255,6.08833L 8.33331,1.52588e-005L 9.97498,1.22334 Z " Visibility="Collapsed"/>
</Border>
<TextBlock Margin="5,0,0,0" VerticalAlignment="Center" Foreground="{TemplateBinding Foreground}" Text="{TemplateBinding Content}"></TextBlock>
</StackPanel>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="LightGray" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Background" Value="#FF9C9E9F" />
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Background" Value="LightGray" />
<Setter Property="Foreground" Value="Gray" />
<Setter Property="BorderBrush" Value="Gray"/>
<Setter TargetName="eliCheck" Property="Opacity" Value="0.5" />
</Trigger>
<Trigger Property="IsChecked" Value="True">
<Setter TargetName="eliCheck" Property="Visibility" Value="Visible"></Setter>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

The CheckBox control has various visual states with different colors for background, border and option mark glyph. You can refer to the documentation for the required parts and visual states.
If you want to edit the colors, you have to change the default style and control template. You can extract it using Blend or Visual Studio. Below is the default template. What you need to do is copy these resources to a resource dictionary in scope, e.g. the application resources and adapt the SolidColorBurshes.
<SolidColorBrush x:Key="OptionMark.Static.Background" Color="#FFFFFFFF"/>
<SolidColorBrush x:Key="OptionMark.Static.Border" Color="#FF707070"/>
<SolidColorBrush x:Key="OptionMark.Static.Glyph" Color="#FF212121"/>
<SolidColorBrush x:Key="OptionMark.MouseOver.Background" Color="#FFF3F9FF"/>
<SolidColorBrush x:Key="OptionMark.MouseOver.Border" Color="#FF5593FF"/>
<SolidColorBrush x:Key="OptionMark.MouseOver.Glyph" Color="#FF212121"/>
<SolidColorBrush x:Key="OptionMark.Pressed.Background" Color="#FFD9ECFF"/>
<SolidColorBrush x:Key="OptionMark.Pressed.Border" Color="#FF3C77DD"/>
<SolidColorBrush x:Key="OptionMark.Pressed.Glyph" Color="#FF212121"/>
<SolidColorBrush x:Key="OptionMark.Disabled.Background" Color="#FFE6E6E6"/>
<SolidColorBrush x:Key="OptionMark.Disabled.Border" Color="#FFBCBCBC"/>
<SolidColorBrush x:Key="OptionMark.Disabled.Glyph" Color="#FF707070"/>
<Style x:Key="FocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="2"
SnapsToDevicePixels="true"
Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"
StrokeDashArray="1 2"
StrokeThickness="1" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="OptionMarkFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="14,0,0,0"
SnapsToDevicePixels="true"
Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"
StrokeDashArray="1 2"
StrokeThickness="1" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="CheckBoxStyle"
TargetType="{x:Type CheckBox}">
<Setter Property="FocusVisualStyle"
Value="{StaticResource FocusVisual}" />
<Setter Property="Background"
Value="{StaticResource OptionMark.Static.Background}" />
<Setter Property="BorderBrush"
Value="{StaticResource OptionMark.Static.Border}" />
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
<Setter Property="BorderThickness"
Value="1" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type CheckBox}">
<Grid x:Name="templateRoot"
Background="Transparent"
SnapsToDevicePixels="True">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Border x:Name="checkBoxBorder"
Margin="1"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<Grid x:Name="markGrid">
<Path x:Name="optionMark"
Margin="1"
Data="F1 M 9.97498,1.22334L 4.6983,9.09834L 4.52164,9.09834L 0,5.19331L 1.27664,3.52165L 4.255,6.08833L 8.33331,1.52588e-005L 9.97498,1.22334 Z "
Fill="{StaticResource OptionMark.Static.Glyph}"
Opacity="0"
Stretch="None" />
<Rectangle x:Name="indeterminateMark"
Margin="2"
Fill="{StaticResource OptionMark.Static.Glyph}"
Opacity="0" />
</Grid>
</Border>
<ContentPresenter x:Name="contentPresenter"
Grid.Column="1"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Focusable="False"
RecognizesAccessKey="True"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="HasContent"
Value="true">
<Setter Property="FocusVisualStyle"
Value="{StaticResource OptionMarkFocusVisual}" />
<Setter Property="Padding"
Value="4,-1,0,0" />
</Trigger>
<Trigger Property="IsMouseOver"
Value="true">
<Setter TargetName="checkBoxBorder"
Property="Background"
Value="{StaticResource OptionMark.MouseOver.Background}" />
<Setter TargetName="checkBoxBorder"
Property="BorderBrush"
Value="{StaticResource OptionMark.MouseOver.Border}" />
<Setter TargetName="optionMark"
Property="Fill"
Value="{StaticResource OptionMark.MouseOver.Glyph}" />
<Setter TargetName="indeterminateMark"
Property="Fill"
Value="{StaticResource OptionMark.MouseOver.Glyph}" />
</Trigger>
<Trigger Property="IsEnabled"
Value="false">
<Setter TargetName="checkBoxBorder"
Property="Background"
Value="{StaticResource OptionMark.Disabled.Background}" />
<Setter TargetName="checkBoxBorder"
Property="BorderBrush"
Value="{StaticResource OptionMark.Disabled.Border}" />
<Setter TargetName="optionMark"
Property="Fill"
Value="{StaticResource OptionMark.Disabled.Glyph}" />
<Setter TargetName="indeterminateMark"
Property="Fill"
Value="{StaticResource OptionMark.Disabled.Glyph}" />
</Trigger>
<Trigger Property="IsPressed"
Value="true">
<Setter TargetName="checkBoxBorder"
Property="Background"
Value="{StaticResource OptionMark.Pressed.Background}" />
<Setter TargetName="checkBoxBorder"
Property="BorderBrush"
Value="{StaticResource OptionMark.Pressed.Border}" />
<Setter TargetName="optionMark"
Property="Fill"
Value="{StaticResource OptionMark.Pressed.Glyph}" />
<Setter TargetName="indeterminateMark"
Property="Fill"
Value="{StaticResource OptionMark.Pressed.Glyph}" />
</Trigger>
<Trigger Property="IsChecked"
Value="true">
<Setter TargetName="optionMark"
Property="Opacity"
Value="1" />
<Setter TargetName="indeterminateMark"
Property="Opacity"
Value="0" />
</Trigger>
<Trigger Property="IsChecked"
Value="{x:Null}">
<Setter TargetName="optionMark"
Property="Opacity"
Value="0" />
<Setter TargetName="indeterminateMark"
Property="Opacity"
Value="1" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Since there are different colors for the Static, MouseOver, Pressed and Disabled states, you might have to derive a small color palette from your background, border and foreground colors.
In order to use the adapted check box style, you can reference it explicitly by key:
<CheckBox Style="{StaticResource CheckBoxStyle}" />
You can also define an implicit style like below after the other resources, so the style will automatically be applied to all CheckBoxes in scope of the containing resource dictionary.
<Style TargetType="{x:Type CheckBox}" BasedOn="{StaticResource CheckBoxStyle}"/>
In this case you do not reference the style explicitly anymore.
<CheckBox />

Related

how to create the blue border on checkbox when mouse is over the containing element C# WPF

I have a WrapPanel containing a Label and a CheckBox. The idea is to make the Label and the CheckBox look like 1 element, so when the WrapPanel's MouseLeftButtonUp is fired (weather the event happens on the CheckBox, or the Label), the checkbox inside it becomes checked (or unchecked if it was already checked).
In WPF, when you move your mouse over a CheckBox it gets this blue border. i want it to happen when the mouse goes over any part of the WrapPanel (the Label or the CheckBox itself)
I tried to call the myCheckbox.Focus(); when the MouseEnter for the WrapPanel is fired, but didn't do the trick.
I also saw this link on how to make checkbox focus border apear when calling CheckBox.Focus(), but it didn't answer my question either.
Any help is appreciated.
Modify the template of the CheckBox to use a WrapPanel instead of the default Grid:
<CheckBox>
<TextBlock>Label that wraps with the CheckBox...</TextBlock>
<CheckBox.Style>
<Style TargetType="{x:Type CheckBox}">
<Style.Resources>
<Style x:Key="FocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="2" StrokeDashArray="1 2" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" SnapsToDevicePixels="true" StrokeThickness="1"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="OptionMarkFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="14,0,0,0" StrokeDashArray="1 2" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" SnapsToDevicePixels="true" StrokeThickness="1"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<SolidColorBrush x:Key="OptionMark.Static.Background" Color="#FFFFFFFF"/>
<SolidColorBrush x:Key="OptionMark.Static.Border" Color="#FF707070"/>
<SolidColorBrush x:Key="OptionMark.Static.Glyph" Color="#FF212121"/>
<SolidColorBrush x:Key="OptionMark.MouseOver.Background" Color="#FFF3F9FF"/>
<SolidColorBrush x:Key="OptionMark.MouseOver.Border" Color="#FF5593FF"/>
<SolidColorBrush x:Key="OptionMark.MouseOver.Glyph" Color="#FF212121"/>
<SolidColorBrush x:Key="OptionMark.Pressed.Background" Color="#FFD9ECFF"/>
<SolidColorBrush x:Key="OptionMark.Pressed.Border" Color="#FF3C77DD"/>
<SolidColorBrush x:Key="OptionMark.Pressed.Glyph" Color="#FF212121"/>
<SolidColorBrush x:Key="OptionMark.Disabled.Background" Color="#FFE6E6E6"/>
<SolidColorBrush x:Key="OptionMark.Disabled.Border" Color="#FFBCBCBC"/>
<SolidColorBrush x:Key="OptionMark.Disabled.Glyph" Color="#FF707070"/>
</Style.Resources>
<Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/>
<Setter Property="Background" Value="{StaticResource OptionMark.Static.Background}"/>
<Setter Property="BorderBrush" Value="{StaticResource OptionMark.Static.Border}"/>
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type CheckBox}">
<WrapPanel x:Name="templateRoot" Background="Transparent" SnapsToDevicePixels="True">
<Border x:Name="checkBoxBorder" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="1" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
<Grid x:Name="markGrid">
<Path x:Name="optionMark" Data="F1 M 9.97498,1.22334L 4.6983,9.09834L 4.52164,9.09834L 0,5.19331L 1.27664,3.52165L 4.255,6.08833L 8.33331,1.52588e-005L 9.97498,1.22334 Z " Fill="{StaticResource OptionMark.Static.Glyph}" Margin="1" Opacity="0" Stretch="None"/>
<Rectangle x:Name="indeterminateMark" Fill="{StaticResource OptionMark.Static.Glyph}" Margin="2" Opacity="0"/>
</Grid>
</Border>
<ContentPresenter x:Name="contentPresenter" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</WrapPanel>
<ControlTemplate.Triggers>
<Trigger Property="HasContent" Value="true">
<Setter Property="FocusVisualStyle" Value="{StaticResource OptionMarkFocusVisual}"/>
<Setter Property="Padding" Value="4,-1,0,0"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.MouseOver.Background}"/>
<Setter Property="BorderBrush" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.MouseOver.Border}"/>
<Setter Property="Fill" TargetName="optionMark" Value="{StaticResource OptionMark.MouseOver.Glyph}"/>
<Setter Property="Fill" TargetName="indeterminateMark" Value="{StaticResource OptionMark.MouseOver.Glyph}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.Disabled.Background}"/>
<Setter Property="BorderBrush" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.Disabled.Border}"/>
<Setter Property="Fill" TargetName="optionMark" Value="{StaticResource OptionMark.Disabled.Glyph}"/>
<Setter Property="Fill" TargetName="indeterminateMark" Value="{StaticResource OptionMark.Disabled.Glyph}"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Background" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.Pressed.Background}"/>
<Setter Property="BorderBrush" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.Pressed.Border}"/>
<Setter Property="Fill" TargetName="optionMark" Value="{StaticResource OptionMark.Pressed.Glyph}"/>
<Setter Property="Fill" TargetName="indeterminateMark" Value="{StaticResource OptionMark.Pressed.Glyph}"/>
</Trigger>
<Trigger Property="IsChecked" Value="true">
<Setter Property="Opacity" TargetName="optionMark" Value="1"/>
<Setter Property="Opacity" TargetName="indeterminateMark" Value="0"/>
</Trigger>
<Trigger Property="IsChecked" Value="{x:Null}">
<Setter Property="Opacity" TargetName="optionMark" Value="0"/>
<Setter Property="Opacity" TargetName="indeterminateMark" Value="1"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</CheckBox.Style>
</CheckBox>
If you're open to an alternative (simpler) solution, This is how you should do it: define a custom style for the checkbox and override the Template so to get the WrapPanel and whatever controls you want look as part of the CheckBox..
<Style TargetType="{x:Type CheckBox}" x:Key="myCheckboxStyle">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type CheckBox}">
<WrapPanel>
<Label />
<!-- other Controls -->
<ContentPresenter/>
</WrapPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
Apply the custom style to the checkbox
<CheckBox Style="{StaticResource myCheckboxStyle}" Content="Check Me"/>

Change Path Fill inside radio button WPF C#

I read on internet that to make a custom style of radio button you need to create a toggle button style.
So here my style :
<Style TargetType="{x:Type ToggleButton}">
<Setter Property="Background" Value="{StaticResource MainOrangeBrush}" />
<Setter Property="Foreground" Value="{StaticResource MainDarkerGrayBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource MainDarkerGrayBrush}" />
<Setter Property="Focusable" Value="False" />
<Setter Property="Margin" Value="0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ToggleButton">
<Border
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" />
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Foreground" Value="{StaticResource MainDarkerGrayBrush}" />
<Setter Property="Background" Value="{StaticResource MainWhiteBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource MainOrangeBrush}" />
</Trigger>
<Trigger Property="IsPressed" Value="True">
<Setter Property="Foreground" Value="{StaticResource MainOrangeBrush}" />
<Setter Property="Background" Value="{StaticResource MainWhiteBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource MainDarkerGrayBrush}" />
</Trigger>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Foreground" Value="{StaticResource MainOrangeBrush}" />
<Setter Property="Background" Value="{StaticResource MainWhiteBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource MainOrangeBrush}" />
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Foreground" Value="{StaticResource MainDarkerGrayBrush}" />
<Setter Property="Background" Value="{StaticResource DisableGrayBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource MainWhiteBrush}" />
</Trigger>
</Style.Triggers>
</Style>
<Style TargetType="{x:Type RadioButton}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<ToggleButton Content="{Binding Path=(Content), RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type RadioButton}}}" IsChecked="{Binding Path=(IsChecked), RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type RadioButton}}}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
I still don't fully understand ContentTemplate and ContentPresenter. I understand that the content presenter is for everything inside the UI element.
So my problem is that I want to set the fill the same color as the foreground inside the toggle button:
<RadioButton
x:Name="Btn"
Width="40"
Height="40"
HorizontalAlignment="Right"
IsChecked="{Binding IsChecked}"
ToolTip="Btn">
<Path
Width="30"
Margin="2"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="F1 M 19.135,13.006 L 12.740,13.006 L 17.243,0.000 L 0.000,17.142 L 6.397,17.142 L 1.480,30.148 L 19.135,13.006 Z"
Fill="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type ToggleButton}}}"
Stretch="Uniform" />
</RadioButton>
This line does not work :
Fill="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type ToggleButton}}}"
Can you help?
I read on internet that to make a custom style of radio button you need to create a toggle button style.
No. You have to create a style for the type RadioButton. The RelativeSource binding does not work, because it does not search for ancestors within the control template and will therefore not find the ToggleButton.
In order to solve your issue, you should create an appropriate style for RadioButton. It is not necessary to use a toggle button in it, but even if you would, the triggers would be defined in the control template, too. Moreover, the style for the ToggleButton as you have defined it is implicit (without an x:Key), which causes it to be applied to every toggle button in scope, not just the RadioButton and that is not what you want.
I have created a sample style that might look similar to what your are trying to do.
<Style x:Key="FocusVisual1">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="2" StrokeDashArray="1 2" SnapsToDevicePixels="true" StrokeThickness="1" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="OptionMarkFocusVisual1">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="14,0,0,0" StrokeDashArray="1 2" SnapsToDevicePixels="true" StrokeThickness="1" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type RadioButton}">
<Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual1}"/>
<Setter Property="Background" Value="{StaticResource MainOrangeBrush}" />
<Setter Property="Foreground" Value="{StaticResource MainDarkerGrayBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource MainDarkerGrayBrush}" />
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Focusable" Value="False" />
<Setter Property="Margin" Value="0" />
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RadioButton}">
<Grid x:Name="templateRoot" Background="Transparent" SnapsToDevicePixels="True">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Border x:Name="radioButtonBorder" Background="{TemplateBinding Background}" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="1,1,2,1" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
<Grid x:Name="markGrid" Margin="2">
<Path x:Name="optionMark"
MinHeight="6"
MinWidth="6"
Margin="2"
Opacity="0"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="F1 M 19.135,13.006 L 12.740,13.006 L 17.243,0.000 L 0.000,17.142 L 6.397,17.142 L 1.480,30.148 L 19.135,13.006 Z"
Fill="{TemplateBinding Foreground}"
Stretch="Uniform" />
</Grid>
</Border>
<ContentPresenter x:Name="contentPresenter" Grid.Column="1" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="HasContent" Value="true">
<Setter Property="FocusVisualStyle" Value="{StaticResource OptionMarkFocusVisual1}"/>
<Setter Property="Padding" Value="4,-1,0,0"/>
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="radioButtonBorder" Value="{StaticResource MainWhiteBrush}"/>
<Setter Property="BorderBrush" TargetName="radioButtonBorder" Value="{StaticResource MainOrangeBrush}"/>
<Setter Property="Fill" TargetName="optionMark" Value="{StaticResource MainDarkerGrayBrush}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Background" TargetName="radioButtonBorder" Value="{StaticResource DisableGrayBrush}"/>
<Setter Property="BorderBrush" TargetName="radioButtonBorder" Value="{StaticResource MainWhiteBrush}"/>
<Setter Property="Fill" TargetName="optionMark" Value="{StaticResource MainDarkerGrayBrush}"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Background" TargetName="radioButtonBorder" Value="{StaticResource MainWhiteBrush}"/>
<Setter Property="BorderBrush" TargetName="radioButtonBorder" Value="{StaticResource MainDarkerGrayBrush}"/>
<Setter Property="Fill" TargetName="optionMark" Value="{StaticResource MainOrangeBrush}"/>
</Trigger>
<Trigger Property="IsChecked" Value="true">
<Setter Property="Opacity" TargetName="optionMark" Value="1"/>
</Trigger>
<Trigger Property="IsChecked" Value="{x:Null}">
<Setter Property="Opacity" TargetName="optionMark" Value="0.56"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
The result looks like below. It is still a radio button, but with your custom Path as option mark and your custom colors applied to the respective states.
In this example, the Path is embedded in the control template and the Content, here the text Test is still applied. You can of course further customize the template so that it fits your requirements.
If you want the Content and the option mark to be customizable without creating a different style, you will have to create a custom radio button control derived from RadioButton and expose a dependency property to specify the option mark content. Then you can bind it in the control template, but that is another question.

How to change DataGrid selected row color WPF

I have created a data grid in my WPF application. I want to change the selected row color. I have following code
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:navigationApp.Resources">
<Style x:Key="DataGridColumnHeaderGripper" TargetType="Thumb">
<Setter Property="Width" Value="18"/>
<Setter Property="Background" Value="#252526"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Border Padding="{TemplateBinding Padding}" Background="Transparent" BorderBrush="#3e3e45">
<Rectangle HorizontalAlignment="Center" Width="1" Fill="{TemplateBinding Background}"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="Padding" Value="8,5" />
<Setter Property="FocusVisualStyle" Value="{x:Null}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGridCell}">
<Grid Background="Transparent">
<ContentPresenter
Margin="{TemplateBinding Padding}"
Content="{TemplateBinding ContentControl.Content}"
ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}"
ContentStringFormat="{TemplateBinding ContentControl.ContentStringFormat}"
SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type DataGridRow}">
<Setter Property="Margin" Value="0"/>
<Setter Property="HorizontalAlignment" Value="Stretch" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGridRow}">
<Grid>
<Border x:Name="BorderOutline" BorderThickness="2,1,1,1" />
<Border x:Name="BorderInline" BorderThickness="0" />
<Grid Background="Black" Opacity="0" />
<SelectiveScrollingGrid>
<SelectiveScrollingGrid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</SelectiveScrollingGrid.ColumnDefinitions>
<SelectiveScrollingGrid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
</SelectiveScrollingGrid.RowDefinitions>
<DataGridCellsPresenter
ItemsPanel="{TemplateBinding ItemsControl.ItemsPanel}"
SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}"
Grid.Column="1" />
<DataGridDetailsPresenter
Visibility="{TemplateBinding DataGridRow.DetailsVisibility}"
Grid.Column="1"
Grid.Row="1"
SelectiveScrollingGrid.SelectiveScrollingOrientation="Both" />
<DataGridRowHeader
Visibility="Visible"
Grid.RowSpan="2"
SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" />
</SelectiveScrollingGrid>
</Grid>
<ControlTemplate.Triggers>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsMouseOver" Value="True" />
<Condition Property="IsSelected" Value="False"/>
</MultiTrigger.Conditions>
<Setter Property="BorderBrush" Value="{DynamicResource ApplicationAccentBrush}" TargetName="BorderOutline" />
<Setter Property="Opacity" Value="0.8" TargetName="BorderOutline" />
<Setter Property="Background" Value="{DynamicResource ApplicationAccentBrushSecondary}" TargetName="BorderInline" />
<Setter Property="Opacity" Value="0.2" TargetName="BorderInline" />
</MultiTrigger>
<Trigger Property="IsSelected" Value="True">
<Setter Property="BorderBrush" Value="{DynamicResource ApplicationAccentBrush}" TargetName="BorderOutline" />
<Setter Property="Background" Value="{DynamicResource ApplicationAccentBrushSecondary}" TargetName="BorderInline" />
<Setter Property="Opacity" Value="0.3" TargetName="BorderInline" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type DataGridColumnHeader}">
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Center"/>
<Setter Property="Foreground" Value="White" />
<Setter Property="Padding" Value="8,2,8,2"/>
<Setter Property="Background" Value="#252526"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGridColumnHeader}">
<Grid>
<Border Name="HeaderBorder" Padding="{TemplateBinding Padding}" BorderThickness="1,1,1,1" BorderBrush="#3e3e45" Background="#252526">
<ContentPresenter
Name="HeaderContent"
Margin="0,0,0,1"
RecognizesAccessKey="True"
Content="{TemplateBinding ContentControl.Content}"
ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}"
ContentStringFormat="{TemplateBinding ContentControl.ContentStringFormat}"
HorizontalAlignment="{TemplateBinding Control.HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding Control.VerticalContentAlignment}"
SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
</Border>
<!--<Thumb x:Name="PART_HeaderGripper" HorizontalAlignment="Right" Margin="0,0,-9,0" Style="{StaticResource DataGridColumnHeaderGripper}"/>-->
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="HeaderBorder" Property="Background" Value="{DynamicResource ApplicationAccentBrushSecondary}"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter TargetName="HeaderBorder" Property="Background" Value="{DynamicResource ApplicationAccentBrush}"/>
<Setter TargetName="HeaderContent" Property="Margin" Value="1,1,0,0"/>
</Trigger>
<Trigger Property="Selector.IsSelected" Value="True">
<Setter Property="TextElement.Foreground" Value="White"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
Currently, the selected row color is white or transperent. So i cant see the selected row details.
You can change the color of the selected row by using triggers.As shown in the datagridrow style. Set the color to the background property of parent control (i.e Grid as TargetName) when row is selected .
<Style TargetType="{x:Type DataGridRow}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGridRow}">
<Grid x:Name="selectedRow">
<DataGridCellsPresenter
ItemsPanel="{TemplateBinding ItemsControl.ItemsPanel}"
SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}"
Grid.Column="1" />
<DataGridDetailsPresenter
Visibility="{TemplateBinding DataGridRow.DetailsVisibility}"
Grid.Column="1"
Grid.Row="1"
SelectiveScrollingGrid.SelectiveScrollingOrientation="Both" />
<DataGridRowHeader
Visibility="Visible"
Grid.RowSpan="2"
SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" />
</SelectiveScrollingGrid>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{DynamicResource ApplicationAccentBrushSecondary}" TargetName="selectedRow" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
In my project, I did as followed:
<Style TargetType="{x:Type DataGridCell}" BasedOn="{StaticResource DataGridCell}">
<Setter Property="Background" Value="{StaticResource DataGridCellBackgroundBrush}"/>
<Setter Property="BorderBrush" Value="{StaticResource DataGridBorderBrush}" />
<Setter Property="BorderThickness" Value="0"/>
<Style.Triggers>
<!-- IsSelected -->
<Trigger Property="IsSelected" Value="True">
<Setter Property="Foreground" Value="{StaticResource BlackBrush}" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="Controls:DataGridCellHelper.IsCellOrRowHeader" Value="True" />
<Condition Property="IsSelected" Value="True" />
</MultiTrigger.Conditions>
<Setter Property="Background" Value="{StaticResource DataGridCellBackgroundBrush}" />
<Setter Property="BorderBrush" Value="{StaticResource DataGridCellBackgroundBrush}" />
</MultiTrigger>
//others properties
DataGridCellBackgroundBrush and DataGridBorderBrush is my color predefined

Show CheckBox-Border on IsChecked

I have the following xaml-code to set a border on a checkbox if the checkbox is checked.
<StackPanel Orientation="Vertical">
<StackPanel.Resources>
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Margin" Value="2"/>
<Style.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="BorderBrush" Value="Lime"/>
<Setter Property="BorderThickness" Value="1"/>
</Trigger>
</Style.Triggers>
</Style>
</StackPanel.Resources>
<CheckBox Content="Use Method 1" />
<CheckBox Content="Use Method 2" />
<CheckBox Content="Use Method 3" />
</StackPanel>
Unfortunately this doesn't work. If I check a CheckBox, nothing happens to the border.
What is wrong with this xaml-code?
You'd need a custom check box template. See below the Aero default style with the modifications that you need:
<SolidColorBrush x:Key="CheckBoxFillNormal" Color="#F4F4F4"/>
<SolidColorBrush x:Key="CheckBoxStroke" Color="#8E8F8F"/>
<Style x:Key="EmptyCheckBoxFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="1" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="CheckRadioFocusVisual">
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate>
<Rectangle Margin="14,0,0,0" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type CheckBox}">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
<Setter Property="Background" Value="{StaticResource CheckBoxFillNormal}"/>
<Setter Property="BorderBrush" Value="{StaticResource CheckBoxStroke}"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="FocusVisualStyle" Value="{StaticResource EmptyCheckBoxFocusVisual}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type CheckBox}">
<BulletDecorator Background="Transparent" SnapsToDevicePixels="true">
<BulletDecorator.Bullet>
<Microsoft_Windows_Themes:BulletChrome BorderBrush="{TemplateBinding BorderBrush}" Background="{TemplateBinding Background}" IsChecked="{TemplateBinding IsChecked}" RenderMouseOver="{TemplateBinding IsMouseOver}" RenderPressed="{TemplateBinding IsPressed}"/>
</BulletDecorator.Bullet>
<Border x:Name="ContentBorder" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" BorderThickness="{TemplateBinding BorderThickness}">
<ContentPresenter RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
</Border>
</BulletDecorator>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="BorderBrush" TargetName="ContentBorder" Value="Lime"/>
</Trigger>
<Trigger Property="HasContent" Value="true">
<Setter Property="FocusVisualStyle" Value="{StaticResource CheckRadioFocusVisual}"/>
<Setter Property="Padding" Value="4,0,0,0"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
You can add a setter to change border brush of BulletChrome when check box is checked (add a name for bullet chrome and duplicate the setter in trigger for IsChecked, just change the name in the new setter)
EDIT:
Oh, and you'd need this xmlns definition:
xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero"
(of course you'd need a reference to PresentationFramework.Aero assembly)

How to change WPF ComboBox SelectedText BackGround Color?

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
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>
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Brushes.xaml"/>
</ResourceDictionary.MergedDictionaries>
<ControlTemplate TargetType="ToggleButton" x:Key="ComboBoxToggleButtonTemplate">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="20" />
</Grid.ColumnDefinitions>
<Border BorderBrush="{StaticResource LightBrush}"
CornerRadius="0"
BorderThickness="1"
Name="Border"
Background="{StaticResource WhiteBrush}"
Grid.ColumnSpan="2" />
<Border Margin="1"
BorderBrush="{StaticResource DarkBrush}"
CornerRadius="0"
BorderThickness="0"
Background="{StaticResource WhiteBrush}"
Grid.Column="0" />
<Path
Data="M0,0L4,4 8,0z"
HorizontalAlignment="Center"
Fill="{DynamicResource DefaultBrush}"
Name="Arrow"
VerticalAlignment="Center"
Width="8"
Grid.Column="1" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="ToggleButton.IsChecked" Value="True">
<Setter Property="Panel.Background" TargetName="Border" Value="{DynamicResource DefaultBrush}"/>
<Setter Property="Shape.Fill" TargetName="Arrow" Value="{StaticResource WhiteBrush}"/>
<Setter Property="Border.BorderBrush" TargetName="Border" Value="{DynamicResource DefaultBrush}"/>
<Setter Property="Border.BorderThickness" TargetName="Border" Value="1,1,1,0"></Setter>
</Trigger>
<Trigger Property="UIElement.IsEnabled" Value="False">
<Setter Property="Panel.Background" TargetName="Border" Value="{StaticResource DisabledBackgroundBrush}"/>
<Setter Property="Border.BorderBrush" TargetName="Border" Value="{StaticResource DisabledBorderBrush}"/>
<Setter Property="TextElement.Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
<Setter Property="Shape.Fill" TargetName="Arrow" Value="#66FFFFFF"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<ControlTemplate TargetType="TextBox" x:Key="ComboBoxTextBoxTemplate">
<Border
Name="PART_ContentHost" Background="{DynamicResource LightDefaultBrush}"
Focusable="False" />
</ControlTemplate>
<Style TargetType="{x:Type ComboBoxItem}">
<Setter Property="UIElement.SnapsToDevicePixels" Value="True"/>
<Setter Property="FrameworkElement.FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="TextElement.Foreground" Value="{StaticResource ForeGroundBrush}"/>
<Setter Property="FrameworkElement.OverridesDefaultStyle" Value="True"/>
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ComboBoxItem}">
<Border
Name="Border"
SnapsToDevicePixels="True"
Padding="3,2,2,2">
<ContentPresenter
ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}"
Content="{TemplateBinding ContentControl.Content}" />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="ComboBoxItem.IsHighlighted" Value="True">
<Setter Property="Panel.Background" TargetName="Border" Value="{DynamicResource DefaultBrush}"/>
<Setter Property="TextElement.Foreground" Value="White"></Setter>
</Trigger>
<Trigger Property="UIElement.IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style TargetType="{x:Type ComboBox}">
<Setter Property="UIElement.SnapsToDevicePixels" Value="True"/>
<Setter Property="FrameworkElement.OverridesDefaultStyle" Value="True"/>
<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
<Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
<Setter Property="TextElement.Foreground" Value="{StaticResource ForeGroundBrush}"/>
<Setter Property="FrameworkElement.FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="Height" Value="25"></Setter>
<Setter Property="Margin" Value="0,2,0,2"></Setter>
<Setter Property="Control.Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBox">
<Grid>
<ToggleButton
ClickMode="Press"
Name="ToggleButton"
IsChecked="{Binding Path=IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}"
Focusable="False"
Grid.Column="2"
Template="{StaticResource ComboBoxToggleButtonTemplate}"/>
<ContentPresenter
Margin="3,3,23,3"
HorizontalAlignment="Left"
Name="ContentSite"
VerticalAlignment="Center"
ContentTemplate="{TemplateBinding ComboBox.SelectionBoxItemTemplate}"
Content="{TemplateBinding ComboBox.SelectionBoxItem}"
IsHitTestVisible="False" />
<TextBox
Margin="3,1,1,1"
Visibility="Hidden"
HorizontalAlignment="Left"
Name="PART_EditableTextBox"
Background="Transparent"
VerticalAlignment="Center"
Style="{x:Null}"
IsReadOnly="False"
Focusable="False"
xml:space="preserve"
Template="{StaticResource ComboBoxTextBoxTemplate}"/>
<Popup
Placement="Bottom"
Name="Popup"
Focusable="False"
AllowsTransparency="True"
IsOpen="{TemplateBinding ComboBox.IsDropDownOpen}"
PopupAnimation="Slide">
<Grid
MinWidth="{TemplateBinding FrameworkElement.ActualWidth}"
MaxHeight="{TemplateBinding ComboBox.MaxDropDownHeight}"
Name="DropDown"
SnapsToDevicePixels="True">
<Border
BorderBrush="{DynamicResource DefaultBrush}"
BorderThickness="1,1,1,1"
Name="DropDownBorder"
Background="{StaticResource WhiteBrush}"/>
<ScrollViewer Margin="1,0,1,0"
SnapsToDevicePixels="True">
<ItemsPresenter
KeyboardNavigation.DirectionalNavigation="Contained" />
</ScrollViewer>
</Grid>
</Popup>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="ItemsControl.HasItems" Value="False">
<Setter Property="FrameworkElement.MinHeight" TargetName="DropDownBorder" Value="95"/>
</Trigger>
<Trigger Property="UIElement.IsEnabled" Value="False">
<Setter Property="TextElement.Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
</Trigger>
<Trigger Property="ItemsControl.IsGrouping" Value="True">
<Setter Property="ScrollViewer.CanContentScroll" Value="False"/>
</Trigger>
<Trigger Property="Window.AllowsTransparency" SourceName="Popup" Value="True">
<Setter Property="Border.CornerRadius" TargetName="DropDownBorder" Value="0"/>
<Setter Property="Border.BorderThickness" TargetName="DropDownBorder" Value="1,0,1,1"/>
<Setter Property="FrameworkElement.Margin" TargetName="DropDownBorder" Value="0,0,0,0"/>
</Trigger>
<Trigger Property="ComboBox.IsEditable" Value="True">
<Setter Property="KeyboardNavigation.IsTabStop" Value="False"/>
<Setter Property="UIElement.Visibility" TargetName="PART_EditableTextBox" Value="Visible"/>
<Setter Property="UIElement.Visibility" TargetName="ContentSite" Value="Hidden"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
In your PART_EditableTextBox the SelectionBrush property controls this background for the selected item. In the code below I set it to be transparent so it will not highlight.
<TextBox x:Name="PART_EditableTextBox"
Margin="3,3,18,3"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Background="Transparent"
Focusable="True"
SelectionBrush="Transparent"
Foreground="{TemplateBinding Foreground}"
IsReadOnly="{TemplateBinding IsReadOnly}"
Style="{x:Null}"
Template="{StaticResource ComboBoxTextBox}"
Visibility="Visible" />

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