wpf - 在 WPF 中拆分数据网格的列

Question

我的表单中有一个数据网格，其中包含每种问题类型的列。 我希望将该列分成两列，因为我想接受后续列中每种问题类型的必答题数量和可选问题数量。

感谢 stackoverflow.com，我在 winforms 中实现了这一点。

我正在尝试在 WPF 中实现相同的目标

提前致谢

Answer 1

我想这是 DataGrid您想要的布局....对吗？

.------.-----------------.--------.
|      |   ID Details    |        |
| Name |-----------------| Status |
|      | ID   | Passport |        |
|------|------|----------|--------|
|X     | 123  | E567868  | Present|
|Y     | 236  | 7875678  | Absent |
'------'------'----------'--------'

WPF 数据网格并不支持这一点。但是您可以进行一些弹性编码。像下面这样的代码可以拆分标题。你需要小心......

When the split columns are reordered (DataGrid.ColumnReordered event), all the sibling columns under their common parent header should be moved, together. I am leaving that code to you.

为 DataGridHeaders 设置一些自定义样式

<Style TargetType="{x:Type Primitives:DataGridColumnHeader}" 
  x:Key="SplitHeaderStyle">
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="Template">
    <Setter.Value>
    <ControlTemplate TargetType="{x:Type Primitives:DataGridColumnHeader}">
        <DockPanel LastChildFill="True">
        <Grid DockPanel.Dock="Bottom">
            <Controls:DataGridHeaderBorder 
            SortDirection="{TemplateBinding SortDirection}"
            IsHovered="{TemplateBinding IsMouseOver}"
            IsPressed="{TemplateBinding IsPressed}"
            IsClickable="{TemplateBinding CanUserSort}"
            Background="{TemplateBinding Background}"
            BorderBrush="{TemplateBinding BorderBrush}"
            BorderThickness="{TemplateBinding BorderThickness}"
            Padding ="{TemplateBinding Padding}"
            SeparatorVisibility="{TemplateBinding SeparatorVisibility}"
            SeparatorBrush="{TemplateBinding SeparatorBrush}">
            <ContentPresenter 
            Content="{Binding RelativeSource={RelativeSource TemplatedParent},
                      Path=Content[0]}"
            SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
            VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
            HorizontalAlignment="Center"/>
            </Controls:DataGridHeaderBorder>
            <Thumb x:Name="PART_LeftHeaderGripper"
               HorizontalAlignment="Left"
               Style="{StaticResource ColumnHeaderGripperStyle}"/>
            <Thumb x:Name="PART_RightHeaderGripper"
               HorizontalAlignment="Right"
               Style="{StaticResource ColumnHeaderGripperStyle}"/>
        </Grid>
        <Grid DockPanel.Dock="Top">
            <Controls:DataGridHeaderBorder
            HorizontalAlignment="Stretch"
            IsClickable="False"
            Background="{TemplateBinding Background}"
            BorderBrush="{TemplateBinding SeparatorBrush}"
            BorderThickness="{TemplateBinding BorderThickness}"
            Padding ="{TemplateBinding Padding}"
            SeparatorVisibility="{TemplateBinding Tag}"
            SeparatorBrush="{TemplateBinding SeparatorBrush}">
            <ContentPresenter 
                Content="{Binding RelativeSource={RelativeSource TemplatedParent}, 
                          Path=Content[1]}"
                SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                Margin="-8,2,-10,2"/>
            </Controls:DataGridHeaderBorder>
            <Thumb x:Name="PART_LeftSplitHeaderGripper"
            HorizontalAlignment="Right"
            Visibility="{TemplateBinding Tag}"
            Style="{StaticResource ColumnHeaderGripperStyle}"/>
        </Grid>
        </DockPanel>
    </ControlTemplate>
    </Setter.Value>
</Setter>
</Style>

<Style TargetType="{x:Type Primitives:DataGridColumnHeader}" 
   BasedOn="{StaticResource SplitHeaderStyle}"
   x:Key="SplitHeaderLeftStyle">
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="Tag" Value="{x:Static Visibility.Visible}"/>
</Style>

<Style TargetType="{x:Type Primitives:DataGridColumnHeader}" 
   BasedOn="{StaticResource SplitHeaderStyle}"
   x:Key="SplitHeaderRightStyle">
<Setter Property="HorizontalContentAlignment" Value="Right"/>
<Setter Property="Tag" Value="{x:Static Visibility.Collapsed}"/>
</Style>

像这样排列列...

<Controls:DataGrid.Columns>
<Controls:DataGridTextColumn 
         Header="Name" 
         Binding="{Binding Name}"/>
<Controls:DataGridTextColumn 
         Binding="{Binding ID}" 
    HeaderStyle="{StaticResource SplitHeaderRightStyle}">
    <Controls:DataGridTextColumn.Header>
    <x:ArrayExtension Type="System:String">
        <System:String>ID</System:String>
        <System:String>ID De</System:String>                            
    </x:ArrayExtension>
    </Controls:DataGridTextColumn.Header>
</Controls:DataGridTextColumn>
<Controls:DataGridTextColumn 
         Binding="{Binding Passport}"
    HeaderStyle="{StaticResource SplitHeaderLeftStyle}">
    <Controls:DataGridTextColumn.Header>
    <x:ArrayExtension Type="System:String">
        <System:String>Passport</System:String>
        <System:String>tails</System:String>                            
    </x:ArrayExtension>
    </Controls:DataGridTextColumn.Header>
</Controls:DataGridTextColumn>
<Controls:DataGridTextColumn 
            Header="Status"
            Binding="{Binding Status}"/>
  </Controls:DataGrid.Columns>

所以基本上您使用相同的默认页眉布局 DataGrid但是以一种方式破解它，使两个 header 看起来就像它们连接在一起。

C#

1. 将您的名字命名为 DataGrid例如x:Name="MyDataGrid" .

2. 在<DataGrid.Resources ..>中保留XAML中的所有样式标签。确保他们有 x:Key放。例如x:Key="SplitHeaderLeftStyle" & x:Key="SplitHeaderRightStyle"

   <DataGrid x:Name="MyDataGrid">
        <DataGrid.Resources>
            <Style 
                 TargetType="{x:Type Primitives:DataGridColumnHeader}" 
                 x:Key="SplitHeaderStyle" .../>
   
            <Style x:Key="SplitHeaderLeftStyle" 
                   BasedOn="{StaticResource SplitHeaderStyle}".../>
   
            <Style x:Key="SplitHeaderRightStyle"
                   BasedOn="{StaticResource SplitHeaderStyle}" .../>
        </DataGrid.Resources>
        ...
   </DataGrid> 
   

3. 在您的 C# 代码中添加列时，通过 Key 设置样式.

     var dgIDColumn 
       = new DataGridTextColumn()
         {
           Header = new string[] { "ID", "ID Det" },
           Binding = new Binding() { Path = new PropertyPath("ID") },
           HeaderStyle = MyDataGrid.FindResource("SplitHeaderRightStyle") as Style;
         };
   
    MyDataGrid.Columns.Add(dgIDColumn);
   
     var dgPassportColumn 
      = new DataGridTextColumn()
        {
           Header = new string[] { "Passport", "ails" },
           Binding = new Binding() { Path = new PropertyPath("Passport") },
           HeaderStyle = MyDataGrid.FindResource("SplitHeaderLeftStyle") as Style;
        };
   
     MyDataGrid.Columns.Add(dgPassportColumn);