WPF Datagrid 绑定自定义列标题

发布于 2024-08-20 05:46:09 字数 619 浏览 4 评论 0原文

我试图弄清楚如何使用 MVVM 模式将 WPF DataGrid 的列标题和主要数据绑定到数据源。我正在寻找的结果如下所示:

替代文字
(来源:vallelunga.com

我已经在这里成功设置了标题的样式,但我不确定如何绑定标题中的值。具体来说,是复选框的 IsChecked 属性、组合框的选定索引和文本框的值。

我以前使用一个简单的 DataTable 来填充主网格数据,但我将需要更复杂的东西来保存网格数据和每列的值。或者也许我可以将它们完全存储为单独的实体。

那么,有人知道我如何实现这种绑定吗?一个限制是这些列必须自动生成,因为在运行时我不知道它们会是什么。该应用程序只需从 Excel 电子表格加载数据,并且可能存在任意数量的列。

谢谢, 布莱恩

I am trying to figure out how to bind a WPF DataGrid's column header and main data to a data source using an MVVM pattern. The result I'm looking for would look like this:

alt text
(source: vallelunga.com)

I've successfully styled the headers here, but I'm unsure how to bind the values in the headers. Specifically, the IsChecked property of the check-box, the selected index of the combo box and the value of the text box.

I was previously using a simple DataTable to populate the main grid data, but I'm going to need something more complex to hold both the grid data and the values for each column. Or perhaps I can store them as separate entities entirely.

So, does anyone have any idea of how I might pull off this binding? One limitation is that the columns must be auto-generated since I have no idea what they will be until runtime. The application simply loads the data form an Excel spreadsheet and there may be any number of columns present.

Thanks,
Brian

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评论(3

最初的梦 2024-08-27 05:46:09

以下是我最终将其与 MVVM 模式结合使用的做法:

我有两组数据用于绑定到我的视图模型:一组用于实际网格数据,一组用于列标题。目前,它们公开为两个属性:

// INotifyPropertyChanged support not shown for brevity
public DataTable GridData { get; set; } 
public BindingList<ImportColumnInfo> ColumnData { get; set; }

处理两组不同数据的技巧在于网格中。我对 DataGrid 进行了子类化,并为网格提供了一个名为 ColumnSource 的附加数据源,作为依赖属性。这就是绑定到我的视图模型上的 ColumnData 的内容。然后,我将每个自动生成的列的标题设置为 ColumnSource 数据源中适当索引的数据。代码如下:

public class ImporterDataGrid : DataGrid
{
    protected override void OnAutoGeneratingColumn(DataGridAutoGeneratingColumnEventArgs e)
    {
        base.OnAutoGeneratingColumn(e);

        int columnIndex = this.Columns.Count;
        var column = new ImporterDataGridColumn();
        column.Header = ColumnSource[columnIndex];
        column.Binding = new Binding(e.PropertyName) { Mode = BindingMode.OneWay };
        e.Column = column;
    }

    public IList ColumnSource
    {
        get { return (IList)GetValue(ColumnSourceProperty); }
        set { SetValue(ColumnSourceProperty, value); }
    }

    public static readonly DependencyProperty ColumnSourceProperty = DependencyProperty.Register("ColumnSource", typeof(IList), typeof(ImporterDataGrid), new FrameworkPropertyMetadata(null));

}

我现在可以在列的模板化标题中执行正常的数据绑定,这将全部绑定到视图模型的 ColumnData 属性中的数据。

更新:我被要求显示我的网格的 XAML。这是非常基本的,但它是:

<Controls:ImporterDataGrid 
    AutoGenerateColumns="True" x:Name="previewDataGrid"
    VerticalScrollBarVisibility="Visible"
    HorizontalScrollBarVisibility="Visible"
    IsReadOnly="True"
    SelectionMode="Extended"
    HeadersVisibility="Column"
    ItemsSource="{Binding PreviewData}"
    ColumnSource="{Binding PreviewColumnData}"
    Style="{StaticResource ImporterDataGridStyle}"
    Background="White" CanUserReorderColumns="False" CanUserResizeRows="False"
    CanUserSortColumns="False" AlternatingRowBackground="#FFFAFAFA" AllowDrop="True" />

这是 ImporterColumnHeaderStyle:

<Style x:Key="ImporterDataGridColumnHeaderStyle" TargetType="{x:Type toolkit:DataGridColumnHeader}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type toolkit:DataGridColumnHeader}">
                <Grid>
                    <toolkit:DataGridHeaderBorder Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" IsClickable="{TemplateBinding CanUserSort}" IsHovered="False" IsPressed="False" SortDirection="{TemplateBinding SortDirection}">
                        <Grid>
                            <CheckBox Height="16" Margin="6,6,16,0" Name="importCheckBox" IsChecked="{Binding Path=Import}" VerticalAlignment="Top">Import Column</CheckBox>
                            <StackPanel IsEnabled="{Binding Path=Import}">
                                <ComboBox Height="24" Margin="6,29,6,0" Name="columnTypeComboBox" VerticalAlignment="Top" SelectedValue="{Binding ColumnType}" ItemsSource="{Binding Source={local:EnumList {x:Type Models:ImportColumnType}}}">
                                </ComboBox>
                                <TextBox Height="23"  Margin="6,6,6,33" Name="customHeadingTextBox" VerticalAlignment="Bottom" Text="{Binding Path=CustomColumnName}" IsEnabled="{Binding ColumnType, Converter={StaticResource ColumnTypeToBooleanConverter}}" />
                            </StackPanel>
                            <TextBlock Height="20" Margin="6,0,6,7" Name="originalHeadingTextBlock" Text="{Binding Path=OriginalColumnName}" VerticalAlignment="Bottom" Foreground="Gray" />
                        </Grid>
                    </toolkit:DataGridHeaderBorder>

                    <Thumb x:Name="PART_LeftHeaderGripper" HorizontalAlignment="Left">
                        <Thumb.Style>
                            <Style TargetType="{x:Type Thumb}">
                                <Setter Property="Width" Value="8"/>
                                <Setter Property="Background" Value="Transparent"/>
                                <Setter Property="Cursor" Value="SizeWE"/>
                                <Setter Property="Template">
                                    <Setter.Value>
                                        <ControlTemplate TargetType="{x:Type Thumb}">
                                            <Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}"/>
                                        </ControlTemplate>
                                    </Setter.Value>
                                </Setter>
                            </Style>
                        </Thumb.Style>
                    </Thumb>
                    <Thumb x:Name="PART_RightHeaderGripper" HorizontalAlignment="Right">
                        <Thumb.Style>
                            <Style TargetType="{x:Type Thumb}">
                                <Setter Property="Width" Value="8"/>
                                <Setter Property="Background" Value="Transparent"/>
                                <Setter Property="Cursor" Value="SizeWE"/>
                                <Setter Property="Template">
                                    <Setter.Value>
                                        <ControlTemplate TargetType="{x:Type Thumb}">
                                            <Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}"/>
                                        </ControlTemplate>
                                    </Setter.Value>
                                </Setter>
                            </Style>
                        </Thumb.Style>
                    </Thumb>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

Here's what I ended up doing to use this with the MVVM pattern:

I have two sets of data for binding on my view model: one for the actual grid data and one for the column headers. Currently these are exposed as two properties:

// INotifyPropertyChanged support not shown for brevity
public DataTable GridData { get; set; } 
public BindingList<ImportColumnInfo> ColumnData { get; set; }

The trick to working with two differing sets of data is in the grid. I have subclassed the DataGrid and given the grid an additional data source called ColumnSource, as a dependency property. This is what is bound to the ColumnData on my view model. I then set the header of each auto-generated column to the appropriately indexed data in the ColumnSource data source. The code is as follows:

public class ImporterDataGrid : DataGrid
{
    protected override void OnAutoGeneratingColumn(DataGridAutoGeneratingColumnEventArgs e)
    {
        base.OnAutoGeneratingColumn(e);

        int columnIndex = this.Columns.Count;
        var column = new ImporterDataGridColumn();
        column.Header = ColumnSource[columnIndex];
        column.Binding = new Binding(e.PropertyName) { Mode = BindingMode.OneWay };
        e.Column = column;
    }

    public IList ColumnSource
    {
        get { return (IList)GetValue(ColumnSourceProperty); }
        set { SetValue(ColumnSourceProperty, value); }
    }

    public static readonly DependencyProperty ColumnSourceProperty = DependencyProperty.Register("ColumnSource", typeof(IList), typeof(ImporterDataGrid), new FrameworkPropertyMetadata(null));

}

I can now perform normal data binding in the templated header of my columns, which will all bind against the data in the ColumnData property of my view model.

UPDATE: I was asked to show the XAML for my grid. It's really basic, but here it is:

<Controls:ImporterDataGrid 
    AutoGenerateColumns="True" x:Name="previewDataGrid"
    VerticalScrollBarVisibility="Visible"
    HorizontalScrollBarVisibility="Visible"
    IsReadOnly="True"
    SelectionMode="Extended"
    HeadersVisibility="Column"
    ItemsSource="{Binding PreviewData}"
    ColumnSource="{Binding PreviewColumnData}"
    Style="{StaticResource ImporterDataGridStyle}"
    Background="White" CanUserReorderColumns="False" CanUserResizeRows="False"
    CanUserSortColumns="False" AlternatingRowBackground="#FFFAFAFA" AllowDrop="True" />

And here is the ImporterColumnHeaderStyle:

<Style x:Key="ImporterDataGridColumnHeaderStyle" TargetType="{x:Type toolkit:DataGridColumnHeader}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type toolkit:DataGridColumnHeader}">
                <Grid>
                    <toolkit:DataGridHeaderBorder Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" IsClickable="{TemplateBinding CanUserSort}" IsHovered="False" IsPressed="False" SortDirection="{TemplateBinding SortDirection}">
                        <Grid>
                            <CheckBox Height="16" Margin="6,6,16,0" Name="importCheckBox" IsChecked="{Binding Path=Import}" VerticalAlignment="Top">Import Column</CheckBox>
                            <StackPanel IsEnabled="{Binding Path=Import}">
                                <ComboBox Height="24" Margin="6,29,6,0" Name="columnTypeComboBox" VerticalAlignment="Top" SelectedValue="{Binding ColumnType}" ItemsSource="{Binding Source={local:EnumList {x:Type Models:ImportColumnType}}}">
                                </ComboBox>
                                <TextBox Height="23"  Margin="6,6,6,33" Name="customHeadingTextBox" VerticalAlignment="Bottom" Text="{Binding Path=CustomColumnName}" IsEnabled="{Binding ColumnType, Converter={StaticResource ColumnTypeToBooleanConverter}}" />
                            </StackPanel>
                            <TextBlock Height="20" Margin="6,0,6,7" Name="originalHeadingTextBlock" Text="{Binding Path=OriginalColumnName}" VerticalAlignment="Bottom" Foreground="Gray" />
                        </Grid>
                    </toolkit:DataGridHeaderBorder>

                    <Thumb x:Name="PART_LeftHeaderGripper" HorizontalAlignment="Left">
                        <Thumb.Style>
                            <Style TargetType="{x:Type Thumb}">
                                <Setter Property="Width" Value="8"/>
                                <Setter Property="Background" Value="Transparent"/>
                                <Setter Property="Cursor" Value="SizeWE"/>
                                <Setter Property="Template">
                                    <Setter.Value>
                                        <ControlTemplate TargetType="{x:Type Thumb}">
                                            <Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}"/>
                                        </ControlTemplate>
                                    </Setter.Value>
                                </Setter>
                            </Style>
                        </Thumb.Style>
                    </Thumb>
                    <Thumb x:Name="PART_RightHeaderGripper" HorizontalAlignment="Right">
                        <Thumb.Style>
                            <Style TargetType="{x:Type Thumb}">
                                <Setter Property="Width" Value="8"/>
                                <Setter Property="Background" Value="Transparent"/>
                                <Setter Property="Cursor" Value="SizeWE"/>
                                <Setter Property="Template">
                                    <Setter.Value>
                                        <ControlTemplate TargetType="{x:Type Thumb}">
                                            <Border Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}"/>
                                        </ControlTemplate>
                                    </Setter.Value>
                                </Setter>
                            </Style>
                        </Thumb.Style>
                    </Thumb>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>
半岛未凉 2024-08-27 05:46:09

我绝对是 WPF / MVVM / 数据绑定菜鸟,但最近一直在努力研究这些东西。我不知道到目前为止您已经连接了什么,但首先您需要为您的视图设置 DataContext。由于您使用的是 MVVM,我假设您有一个 ViewModel,因此它应该是您的视图的 DataContext。

即,如果您让视图创建/拥有您的 ViewModel,它可能看起来像这样:

MyViewModel vm = new MyViewModel();
this.DataContext = vm;

您可以轻松地将 CheckBox、ComboBox 和 TextBox 数据绑定到 ViewModel 中的属性。我发现最简单的方法是让您的 ViewModel 从基本视图模型类继承,例如 乔什·史密斯写的。当您希望 ViewModel 通知 GUI 值的任何更改时,这将为您提供一个内部调用的方法。

假设您有 ImportColumn、LastName 和 LastNameText 等属性(所有 C# 属性,而不是相应调用 OnPropertyChanged 的​​字段),那么您的 XAML 将如下所示:

<CheckBox IsChecked="{Binding ImportColumn}" />
<ComboBox SelectedItem="{Binding LastName}" />
<TextBox Text="{Binding LastName Text, Mode=TwoWay}" />

我希望这对您有所帮助。如果没有,请发表评论,我会尽力尝试其他事情。

I am definitely a WPF / MVVM / databinding noob, but have been working hard on this stuff lately. I don't know what you have wired up so far, but first you'll want to set the DataContext for your View. Since you're using MVVM, I assume you have a ViewModel, so that should be the DataContext for your View.

i.e. if you have your View create / own your ViewModel, it could look something like this:

MyViewModel vm = new MyViewModel();
this.DataContext = vm;

You can easily databind your CheckBox, ComboBox, and TextBox to properties in your ViewModel. I have found the easiest way is to make your ViewModel inherit from a base viewmodel class, like the one that Josh Smith wrote. This will give you a method to call internally when you want the ViewModel to notify the GUI of any changes in values.

Assuming you have properties like ImportColumn, LastName, and LastNameText (all C# properties, not fields that call OnPropertyChanged accordingly), then your XAML would look something like this:

<CheckBox IsChecked="{Binding ImportColumn}" />
<ComboBox SelectedItem="{Binding LastName}" />
<TextBox Text="{Binding LastName Text, Mode=TwoWay}" />

I hope this helps you out. If not, please comment and I'll try to do as best as I can to try other things out.

吃兔兔 2024-08-27 05:46:09

我们在我们的应用程序中做了类似的事情。

我所做的是派生出我自己的列类型(DataGridSearchableBooleanColumn),然后替换 DataGridColumnHeader 模板,我在其中放置了两个内容演示者。第一个我绑定到内容(与默认模板相同),第二个我绑定到列。我为该列使用了一个数据模板(其中有一些用于不同的搜索类型(文本、组合、布尔值)。然后我向该列添加额外的属性,以便我可以绑定到它们。看看这段代码是否有意义。

   <!--Style for the datagrid column headers, contains a text box for searching-->
   <Style
      x:Key="columnHeaderStyle"
      TargetType="dg:DataGridColumnHeader">
      <Setter
         Property="Foreground"
         Value="#FF000000" />
      <Setter
         Property="HorizontalContentAlignment"
         Value="Left" />
      <Setter
         Property="VerticalContentAlignment"
         Value="Center" />
      <Setter
         Property="IsTabStop"
         Value="False" />
      <Setter
         Property="Padding"
         Value="1,2,1,2" />
      <Setter
         Property="Template">
         <Setter.Value>
            <ControlTemplate
               TargetType="dg:DataGridColumnHeader">
               <Grid
                  x:Name="Root">
                  <dg:DataGridHeaderBorder
                     Background="{TemplateBinding Background}"
                     BorderBrush="{TemplateBinding BorderBrush}"
                     BorderThickness="{TemplateBinding BorderThickness}"
                     Padding="{TemplateBinding Padding}"
                     IsClickable="{TemplateBinding CanUserSort}"
                     IsHovered="{TemplateBinding IsMouseOver}"
                     IsPressed="{TemplateBinding IsPressed}"
                     SeparatorBrush="{TemplateBinding SeparatorBrush}"
                     SeparatorVisibility="{TemplateBinding SeparatorVisibility}"
                     SortDirection="{TemplateBinding SortDirection}">

                     <Grid
                        HorizontalAlignment="Stretch"
                        Margin="{TemplateBinding Padding}"
                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
                        <Grid.Resources>
                           <DataTemplate
                              DataType="{x:Type local:DataGridSearchableBooleanColumn}">
                              <CheckBox
                                 Margin="0,5,0,0"
                                 IsThreeState="True"
                                 IsChecked="{Binding Path=IsChecked}" />
                           </DataTemplate>
                        </Grid.Resources>
                        <Grid.ColumnDefinitions>
                           <ColumnDefinition />
                           <ColumnDefinition
                              Width="Auto" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                           <RowDefinition
                              Height="19" />
                           <RowDefinition
                              Height="Auto" />
                        </Grid.RowDefinitions>

                        <ContentPresenter
                           Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay, Path=Content}" />

                        <Path
                           x:Name="SortIcon"
                           Fill="#FF444444"
                           Stretch="Uniform"
                           HorizontalAlignment="Left"
                           Margin="4,0,0,0"
                           VerticalAlignment="Center"
                           Width="8"
                           Opacity="0"
                           RenderTransformOrigin=".5,.5"
                           Grid.Column="1"
                           Data="F1 M -5.215,6.099L 5.215,6.099L 0,0L -5.215,6.099 Z ">
                           <Path.RenderTransform>
                              <ScaleTransform
                                 ScaleX=".9"
                                 ScaleY=".9" />
                           </Path.RenderTransform>
                        </Path>
                        <ContentPresenter
                           x:Name="columnHeaderContentPresenter"
                           Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Column}"
                           Grid.Row="1"
                           Grid.ColumnSpan="2"
                           Margin="0,0,0,0" />
                     </Grid>
                  </dg:DataGridHeaderBorder>

                  <Thumb
                     x:Name="PART_LeftHeaderGripper"
                     HorizontalAlignment="Left">
                     <Thumb.Style>
                        <Style
                           TargetType="{x:Type Thumb}">
                           <Setter
                              Property="Width"
                              Value="8" />
                           <Setter
                              Property="Background"
                              Value="Transparent" />
                           <Setter
                              Property="Cursor"
                              Value="SizeWE" />
                           <Setter
                              Property="Template">
                              <Setter.Value>
                                 <ControlTemplate
                                    TargetType="{x:Type Thumb}">
                                    <Border
                                       Background="{TemplateBinding Background}"
                                       Padding="{TemplateBinding Padding}" />
                                 </ControlTemplate>
                              </Setter.Value>
                           </Setter>
                        </Style>
                     </Thumb.Style>
                  </Thumb>
                  <Thumb
                     x:Name="PART_RightHeaderGripper"
                     HorizontalAlignment="Right">
                     <Thumb.Style>
                        <Style
                           TargetType="{x:Type Thumb}">
                           <Setter
                              Property="Width"
                              Value="8" />
                           <Setter
                              Property="Background"
                              Value="Transparent" />
                           <Setter
                              Property="Cursor"
                              Value="SizeWE" />
                           <Setter
                              Property="Template">
                              <Setter.Value>
                                 <ControlTemplate
                                    TargetType="{x:Type Thumb}">
                                    <Border
                                       Background="{TemplateBinding Background}"
                                       Padding="{TemplateBinding Padding}" />
                                 </ControlTemplate>
                              </Setter.Value>
                           </Setter>
                        </Style>
                     </Thumb.Style>
                  </Thumb>
               </Grid>
            </ControlTemplate>
         </Setter.Value>
      </Setter>
   </Style>

We do something similar in our app.

What i have done is derived my own column type (DataGridSearchableBooleanColumn), then i replace the DataGridColumnHeader template, i put two content presenters in there. the first i bind to the content (the same as the default template) the second i bind to the column. I use a data template for the column (i have a few of them for different search types (text, combo, boolean). then i add the extra properties to the column so i can bind to them. See if this code makes sense.

   <!--Style for the datagrid column headers, contains a text box for searching-->
   <Style
      x:Key="columnHeaderStyle"
      TargetType="dg:DataGridColumnHeader">
      <Setter
         Property="Foreground"
         Value="#FF000000" />
      <Setter
         Property="HorizontalContentAlignment"
         Value="Left" />
      <Setter
         Property="VerticalContentAlignment"
         Value="Center" />
      <Setter
         Property="IsTabStop"
         Value="False" />
      <Setter
         Property="Padding"
         Value="1,2,1,2" />
      <Setter
         Property="Template">
         <Setter.Value>
            <ControlTemplate
               TargetType="dg:DataGridColumnHeader">
               <Grid
                  x:Name="Root">
                  <dg:DataGridHeaderBorder
                     Background="{TemplateBinding Background}"
                     BorderBrush="{TemplateBinding BorderBrush}"
                     BorderThickness="{TemplateBinding BorderThickness}"
                     Padding="{TemplateBinding Padding}"
                     IsClickable="{TemplateBinding CanUserSort}"
                     IsHovered="{TemplateBinding IsMouseOver}"
                     IsPressed="{TemplateBinding IsPressed}"
                     SeparatorBrush="{TemplateBinding SeparatorBrush}"
                     SeparatorVisibility="{TemplateBinding SeparatorVisibility}"
                     SortDirection="{TemplateBinding SortDirection}">

                     <Grid
                        HorizontalAlignment="Stretch"
                        Margin="{TemplateBinding Padding}"
                        VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
                        <Grid.Resources>
                           <DataTemplate
                              DataType="{x:Type local:DataGridSearchableBooleanColumn}">
                              <CheckBox
                                 Margin="0,5,0,0"
                                 IsThreeState="True"
                                 IsChecked="{Binding Path=IsChecked}" />
                           </DataTemplate>
                        </Grid.Resources>
                        <Grid.ColumnDefinitions>
                           <ColumnDefinition />
                           <ColumnDefinition
                              Width="Auto" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                           <RowDefinition
                              Height="19" />
                           <RowDefinition
                              Height="Auto" />
                        </Grid.RowDefinitions>

                        <ContentPresenter
                           Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Mode=OneWay, Path=Content}" />

                        <Path
                           x:Name="SortIcon"
                           Fill="#FF444444"
                           Stretch="Uniform"
                           HorizontalAlignment="Left"
                           Margin="4,0,0,0"
                           VerticalAlignment="Center"
                           Width="8"
                           Opacity="0"
                           RenderTransformOrigin=".5,.5"
                           Grid.Column="1"
                           Data="F1 M -5.215,6.099L 5.215,6.099L 0,0L -5.215,6.099 Z ">
                           <Path.RenderTransform>
                              <ScaleTransform
                                 ScaleX=".9"
                                 ScaleY=".9" />
                           </Path.RenderTransform>
                        </Path>
                        <ContentPresenter
                           x:Name="columnHeaderContentPresenter"
                           Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Column}"
                           Grid.Row="1"
                           Grid.ColumnSpan="2"
                           Margin="0,0,0,0" />
                     </Grid>
                  </dg:DataGridHeaderBorder>

                  <Thumb
                     x:Name="PART_LeftHeaderGripper"
                     HorizontalAlignment="Left">
                     <Thumb.Style>
                        <Style
                           TargetType="{x:Type Thumb}">
                           <Setter
                              Property="Width"
                              Value="8" />
                           <Setter
                              Property="Background"
                              Value="Transparent" />
                           <Setter
                              Property="Cursor"
                              Value="SizeWE" />
                           <Setter
                              Property="Template">
                              <Setter.Value>
                                 <ControlTemplate
                                    TargetType="{x:Type Thumb}">
                                    <Border
                                       Background="{TemplateBinding Background}"
                                       Padding="{TemplateBinding Padding}" />
                                 </ControlTemplate>
                              </Setter.Value>
                           </Setter>
                        </Style>
                     </Thumb.Style>
                  </Thumb>
                  <Thumb
                     x:Name="PART_RightHeaderGripper"
                     HorizontalAlignment="Right">
                     <Thumb.Style>
                        <Style
                           TargetType="{x:Type Thumb}">
                           <Setter
                              Property="Width"
                              Value="8" />
                           <Setter
                              Property="Background"
                              Value="Transparent" />
                           <Setter
                              Property="Cursor"
                              Value="SizeWE" />
                           <Setter
                              Property="Template">
                              <Setter.Value>
                                 <ControlTemplate
                                    TargetType="{x:Type Thumb}">
                                    <Border
                                       Background="{TemplateBinding Background}"
                                       Padding="{TemplateBinding Padding}" />
                                 </ControlTemplate>
                              </Setter.Value>
                           </Setter>
                        </Style>
                     </Thumb.Style>
                  </Thumb>
               </Grid>
            </ControlTemplate>
         </Setter.Value>
      </Setter>
   </Style>
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