Question

我在WPF Windows应用程序中使用WPF工具包中的datagrid。它在rowheader中有一个datatemplate，它创建一个用于选择行的复选框列。

如果单击复选框列的标题行（网格中最左上角的单元格），它将检查网格中的所有复选框，从而选择所有行。

来自xaml的相关部分

<Window x:Class="Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:toolkit="http://schemas.microsoft.com/wpf/2008/toolkit" >

<toolkit:DataGrid Name="dataGrid" ItemsSource="{Binding}" 
AutoGenerateColumns="True" SelectionMode="Extended" CanResizeRows="False">
    <toolkit:DataGrid.RowHeaderTemplate>
        <DataTemplate>
            <Grid>
                <CheckBox IsChecked="{
                Binding Path=IsSelected, 
                Mode=TwoWay, 
                RelativeSource={RelativeSource FindAncestor, 
                AncestorType={x:Type toolkit:DataGridRow}}}"
                />
            </Grid>
        </DataTemplate>
    </toolkit:DataGrid.RowHeaderTemplate>
</toolkit:DataGrid>
</Window>

现在我想知道如何处理这个点击。我计划处理它并显示一个弹出菜单。

我应该为哪个控件的点击事件进行连线？

答案： 使用SelectAllCommand来处理像这样的事件（例子）

datagrid.CommandBindings.Add(new CommandBinding(
Microsoft.Windows.Controls.DataGrid.SelectAllCommand, 
OnSelectAll, CanExecuteSelectAll));
public void OnSelectAll(object sender, ExecutedRoutedEventArgs e)
    {
        MessageBox.Show("All Selected");
    }
public void CanExecuteSelectAll(object sender, CanExecuteRoutedEventArgs e)
    {
        e.CanExecute = true;
        Console.WriteLine("Can I execute?");
    }

Answer 1

如果展开DataGrid ControlTemplate，您可以看到有一个绑定到SelectAllCommand的Button。

<Window x:Class="WpfApplication1.Window3"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:toolkit="http://schemas.microsoft.com/wpf/2008/toolkit"
Title="Window3" Height="500" Width="500"
Loaded="Window_Loaded">
<Window.Resources>
    <Style x:Key="DataGridStyle1" TargetType="{x:Type toolkit:DataGrid}">
        <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}"/>
        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
        <Setter Property="BorderBrush" Value="#FF688CAF"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="RowDetailsVisibilityMode" Value="VisibleWhenSelected"/>
        <Setter Property="ScrollViewer.CanContentScroll" Value="True"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type toolkit:DataGrid}">
                    <Border SnapsToDevicePixels="True" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}">
                        <ScrollViewer x:Name="DG_ScrollViewer" Focusable="False">
                            <ScrollViewer.Template>
                                <ControlTemplate TargetType="{x:Type ScrollViewer}">
                                    <Grid>
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="Auto"/>
                                            <ColumnDefinition Width="*"/>
                                            <ColumnDefinition Width="Auto"/>
                                        </Grid.ColumnDefinitions>
                                        <Grid.RowDefinitions>
                                            <RowDefinition Height="Auto"/>
                                            <RowDefinition Height="*"/>
                                            <RowDefinition Height="Auto"/>
                                        </Grid.RowDefinitions>
                                        <Button Command="{x:Static toolkit:DataGrid.SelectAllCommand}"
                                         Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type toolkit:DataGrid}}}" Focusable="False">
                                            <Button.Template>
                                                <ControlTemplate TargetType="{x:Type Button}">
                                                    <Grid>
                                                        <Rectangle x:Name="Border" Fill="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" SnapsToDevicePixels="True"/>
                                                        <Polygon x:Name="Arrow" Fill="Black" Stretch="Uniform" HorizontalAlignment="Right" Margin="8,8,3,3" VerticalAlignment="Bottom" Opacity="0.15" Points="0,10 10,10 10,0"/>
                                                    </Grid>
                                                    <ControlTemplate.Triggers>
                                                        <Trigger Property="IsMouseOver" Value="True">
                                                            <Setter Property="Stroke" TargetName="Border" Value="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}"/>
                                                        </Trigger>
                                                        <Trigger Property="IsPressed" Value="True">
                                                            <Setter Property="Fill" TargetName="Border" Value="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}"/>
                                                        </Trigger>
                                                        <Trigger Property="IsEnabled" Value="False">
                                                            <Setter Property="Visibility" TargetName="Arrow" Value="Collapsed"/>
                                                        </Trigger>
                                                    </ControlTemplate.Triggers>
                                                </ControlTemplate>
                                            </Button.Template>
                                            <Button.Visibility>
                                                <Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type toolkit:DataGrid}}">
                                                    <Binding.ConverterParameter>
                                                        <toolkit:DataGridHeadersVisibility>All</toolkit:DataGridHeadersVisibility>
                                                    </Binding.ConverterParameter>
                                                </Binding>
                                            </Button.Visibility>
                                        </Button>
                                        <toolkit:DataGridColumnHeadersPresenter x:Name="PART_ColumnHeadersPresenter" Grid.Column="1">
                                            <toolkit:DataGridColumnHeadersPresenter.Visibility>
                                                <Binding Path="HeadersVisibility" RelativeSource="{RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type toolkit:DataGrid}}">
                                                    <Binding.ConverterParameter>
                                                        <toolkit:DataGridHeadersVisibility>Column</toolkit:DataGridHeadersVisibility>
                                                    </Binding.ConverterParameter>
                                                </Binding>
                                            </toolkit:DataGridColumnHeadersPresenter.Visibility>
                                        </toolkit:DataGridColumnHeadersPresenter>
                                        <ScrollContentPresenter x:Name="PART_ScrollContentPresenter" Content="{TemplateBinding Content}" ContentStringFormat="{TemplateBinding ContentStringFormat}" ContentTemplate="{TemplateBinding ContentTemplate}" Grid.ColumnSpan="2" Grid.Row="1" CanContentScroll="{TemplateBinding CanContentScroll}" CanHorizontallyScroll="False" CanVerticallyScroll="False"/>
                                        <ScrollBar x:Name="PART_VerticalScrollBar" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Grid.Column="2" Grid.Row="1" Maximum="{TemplateBinding ScrollableHeight}" Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" Orientation="Vertical" ViewportSize="{TemplateBinding ViewportHeight}"/>
                                        <Grid Grid.Column="1" Grid.Row="2">
                                            <Grid.ColumnDefinitions>
                                                <ColumnDefinition Width="{Binding NonFrozenColumnsViewportHorizontalOffset, RelativeSource={RelativeSource FindAncestor, AncestorLevel=1, AncestorType={x:Type toolkit:DataGrid}}}"/>
                                                <ColumnDefinition Width="*"/>
                                            </Grid.ColumnDefinitions>
                                            <ScrollBar x:Name="PART_HorizontalScrollBar" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Grid.Column="1" Maximum="{TemplateBinding ScrollableWidth}" Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" Orientation="Horizontal" ViewportSize="{TemplateBinding ViewportWidth}"/>
                                        </Grid>
                                    </Grid>
                                </ControlTemplate>
                            </ScrollViewer.Template>
                            <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                        </ScrollViewer>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="IsGrouping" Value="True">
                <Setter Property="ScrollViewer.CanContentScroll" Value="False"/>
            </Trigger>
        </Style.Triggers>
    </Style>
</Window.Resources>
<Grid>
    <toolkit:DataGrid Name="dataGrid" 
                      ItemsSource="{Binding}"
                      CanUserResizeRows="False" 
                      SelectionMode="Extended" 
                      AutoGenerateColumns="True" Style="{DynamicResource DataGridStyle1}">
        <toolkit:DataGrid.RowHeaderTemplate>
            <DataTemplate>
                <Grid>
                    <CheckBox IsChecked="{
                        Binding Path=IsSelected, 
                        Mode=TwoWay, 
                        RelativeSource={RelativeSource FindAncestor, 
                        AncestorType={x:Type toolkit:DataGridRow}}}"
                        />
                </Grid>
            </DataTemplate>
        </toolkit:DataGrid.RowHeaderTemplate>
    </toolkit:DataGrid>
</Grid>

您可以覆盖该按钮的命令以执行您自己的逻辑，甚至可以用不同的控件替换该按钮。

如何在datagrid中点击复选框列标题显示弹出菜单？

1 个答案: