I'm trying to set a style for my ListView header, and I have a problem: There are some white lines on the sides of the columns and I dont know how to remove them. Image showing the problem.
This is the XAML from my style:
<Style x:Key="ColumnHeader" TargetType="{x:Type GridViewColumnHeader}">
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="Height" Value="45" />
<Setter Property="Background">
<Setter.Value>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FF1B405D" Offset="1"/>
<GradientStop Color="#FF2F7CA8" Offset="0"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="Foreground" Value="White"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="BorderBrush" Value="Black"/>
<Setter Property="Margin" Value="0,0,3,0"/>
</Style>
And this is the code from my listview:
<ListView Height="520" Margin="0,130,10,0" FontSize="28"
FontFamily="/WpfApplication2;component/Resources/#Purista SemiBold"
Background="{x:Null}" BorderBrush="{x:Null}"
SelectionChanged="ListView_SelectionChanged">
<ListView.View>
<GridView ColumnHeaderContainerStyle="{StaticResource ColumnHeader}" AllowsColumnReorder="False" >
<GridViewColumn Header=" Name" Width="500"/>
<GridViewColumn Header=" ID" Width="100"/>
<GridViewColumn Header=" Mode" Width="150"/>
<GridViewColumn Header=" Version" Width="150"/>
</GridView>
</ListView.View>
</ListView>
How can I remove the white lines? I already tried to remove the border by setting the thickness to 0, but the white line is still here.
In your GridViewColumnHeaderStyle change the margin setter to
<Setter Property="Margin" Value="0,0,0,0"/>
Add the following code to your GridViewColumnHeaderStyle
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GridViewColumnHeader}">
<Grid SnapsToDevicePixels="true">
<Border x:Name="HeaderBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0,1,0,1" Background="{TemplateBinding Background}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition MaxHeight="7"/>
<RowDefinition/>
</Grid.RowDefinitions>
<Rectangle x:Name="UpperHighlight" Fill="#FFE3F7FF" Visibility="Collapsed"/>
<Border Padding="{TemplateBinding Padding}" Grid.RowSpan="2">
<ContentPresenter x:Name="HeaderContent" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="0,0,0,1" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
</Border>
</Grid>
</Border>
<Border x:Name="HeaderHoverBorder" BorderThickness="1,0,1,1" Margin="1,1,0,0"/>
<Border x:Name="HeaderPressBorder" BorderThickness="1,1,1,0" Margin="1,0,0,1"/>
<Canvas>
<Thumb x:Name="PART_HeaderGripper" Style="{StaticResource GridViewColumnHeaderGripper}"/>
</Canvas>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Background" TargetName="HeaderBorder" Value="{StaticResource GridViewColumnHeaderHoverBackground}"/>
<Setter Property="BorderBrush" TargetName="HeaderHoverBorder" Value="#FF88CBEB"/>
<Setter Property="Visibility" TargetName="UpperHighlight" Value="Visible"/>
<Setter Property="Background" TargetName="PART_HeaderGripper" Value="Transparent"/>
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter Property="Background" TargetName="HeaderBorder" Value="{StaticResource GridViewColumnHeaderPressBackground}"/>
<Setter Property="BorderBrush" TargetName="HeaderHoverBorder" Value="#FF95DAF9"/>
<Setter Property="BorderBrush" TargetName="HeaderPressBorder" Value="#FF7A9EB1"/>
<Setter Property="Visibility" TargetName="UpperHighlight" Value="Visible"/>
<Setter Property="Fill" TargetName="UpperHighlight" Value="#FFBCE4F9"/>
<Setter Property="Visibility" TargetName="PART_HeaderGripper" Value="Hidden"/>
<Setter Property="Margin" TargetName="HeaderContent" Value="1,1,0,0"/>
</Trigger>
<Trigger Property="Height" Value="Auto">
<Setter Property="MinHeight" Value="20"/>
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
This overrides the template (got this template from Blend).
Above your style in your Resources, place the following code
<LinearGradientBrush x:Key="GridViewColumnHeaderBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFFFFFFF" Offset="0"/>
<GradientStop Color="#FFFFFFFF" Offset="0.4091"/>
<GradientStop Color="#FFF7F8F9" Offset="1"/>
</LinearGradientBrush>
<!--<LinearGradientBrush x:Key="GridViewColumnHeaderBorderBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF2F2F2" Offset="0"/>
<GradientStop Color="#FFD5D5D5" Offset="1"/>
</LinearGradientBrush>-->
<SolidColorBrush x:Key="GridViewColumnHeaderBorderBackground" Color="Transparent"></SolidColorBrush>
<LinearGradientBrush x:Key="GridViewColumnHeaderHoverBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFBDEDFF" Offset="0"/>
<GradientStop Color="#FFB7E7FB" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="GridViewColumnHeaderPressBackground" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FF8DD6F7" Offset="0"/>
<GradientStop Color="#FF8AD1F5" Offset="1"/>
</LinearGradientBrush>
<Style x:Key="GridViewColumnHeaderGripper" TargetType="{x:Type Thumb}">
<Setter Property="Canvas.Right" Value="-9"/>
<Setter Property="Width" Value="18"/>
<Setter Property="Height" Value="{Binding ActualHeight, RelativeSource={RelativeSource TemplatedParent}}"/>
<Setter Property="Padding" Value="0"/>
<Setter Property="Background" Value="{StaticResource GridViewColumnHeaderBorderBackground}"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Border Background="Transparent" Padding="{TemplateBinding Padding}">
<Rectangle Fill="{TemplateBinding Background}" HorizontalAlignment="Center" Width="1"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
These are the styles and resources referenced in the preceding template. Notice the commented out GridViewColumnHeaderBorderBackground is replaced with a SolidColorBrush with the Color set to Transparent. This will make the white line go away completely. Change that brush resource to make it whichever color you wish.