如何将输入绑定添加到 DataGrid 样式答案

【问题标题】：How to add inputbindings to DataGrid Style如何将输入绑定添加到 DataGrid 样式
【发布时间】：2019-01-12 14:55:42
【问题描述】：

我想在全局样式资源中为DataGrid 添加一个MouseBinding，以便为每个DataGrid 触发基本ViewModel 中定义的“EditCommand”。我尝试的方式如下所示。但是，DataGrid 没有显示 - 这是有道理的，因为 ContentPresenter 是空的。我必须添加什么才能显示应用了InputBindings 的常规DataGrid？

<Style x:Key="StandardTabelle" TargetType="{x:Type DataGrid}">
    <Setter Property="Margin" Value="5"/>
    <Setter Property="Background" Value="White"/>
    <Setter Property="AlternatingRowBackground" Value="#ebecec"/>
    <Setter Property="FontSize" Value="12" />
    <Setter Property="RowHeight" Value="24"/>
    <Setter Property="CanUserAddRows" Value="False"/>
    <Setter Property="CanUserDeleteRows" Value="False"/>
    <Setter Property="CanUserReorderColumns" Value="False"/>
    <Setter Property="CanUserResizeRows" Value="False"/>
    <Setter Property="CanUserResizeColumns" Value="False"/>
    <Setter Property="IsReadOnly" Value="True" />
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="VerticalContentAlignment" Value="Center" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type DataGrid}">
                <ContentPresenter>
                     <!--What goes here to show the regular content?-->
                    <ContentPresenter.InputBindings>
                        <MouseBinding Gesture="LeftDoubleClick" Command="{Binding DataContext.EditCommand}" />
                    </ContentPresenter.InputBindings>
                </ContentPresenter>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

【问题讨论】：

你的目标是datagrid，然后决定它里面有一个contentpresenter。那是行不通的。 stackoverflow.com/questions/1104601/… 忽略标题。使用附加属性方法添加输入绑定。或者。定义一个包含绑定的内容控件模板，然后在需要输入绑定时使用其中一个包含数据网格的模板。

标签： wpf xaml datagrid

【解决方案1】：

您需要定义一个完整的ControlTemplate。您可以通过在 Visual Studio 的设计模式下右键单击 DataGrid 并选择“编辑模板”->“编辑副本”来复制默认副本，然后根据您的要求进行编辑，例如：

<Style x:Key="StandardTabelle" TargetType="{x:Type DataGrid}">
    <Setter Property="Margin" Value="5"/>
    <Setter Property="Background" Value="White"/>
    <Setter Property="AlternatingRowBackground" Value="#ebecec"/>
    <Setter Property="FontSize" Value="12" />
    <Setter Property="RowHeight" Value="24"/>
    <Setter Property="CanUserAddRows" Value="False"/>
    <Setter Property="CanUserDeleteRows" Value="False"/>
    <Setter Property="CanUserReorderColumns" Value="False"/>
    <Setter Property="CanUserResizeRows" Value="False"/>
    <Setter Property="CanUserResizeColumns" Value="False"/>
    <Setter Property="IsReadOnly" Value="True" />
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="VerticalContentAlignment" Value="Center" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type DataGrid}">
                <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="True">
                    <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 DataGrid.SelectAllCommand}" Focusable="false" Style="{DynamicResource {ComponentResourceKey ResourceId=DataGridSelectAllButtonStyle, TypeInTargetAssembly={x:Type DataGrid}}}" Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.All}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" Width="{Binding CellsPanelHorizontalOffset, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"/>
                                    <DataGridColumnHeadersPresenter x:Name="PART_ColumnHeadersPresenter" Grid.Column="1" Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Column}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"/>
                                    <ScrollContentPresenter x:Name="PART_ScrollContentPresenter" CanContentScroll="{TemplateBinding CanContentScroll}" Grid.ColumnSpan="2" Grid.Row="1">
                                        <ScrollContentPresenter.InputBindings>
                                            <MouseBinding Gesture="LeftDoubleClick" Command="{Binding DataContext.EditCommand}" />
                                        </ScrollContentPresenter.InputBindings>
                                    </ScrollContentPresenter>
                                    <ScrollBar x:Name="PART_VerticalScrollBar" Grid.Column="2" Maximum="{TemplateBinding ScrollableHeight}" Orientation="Vertical" Grid.Row="1" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Value="{Binding VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" ViewportSize="{TemplateBinding ViewportHeight}"/>
                                    <Grid Grid.Column="1" Grid.Row="2">
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="{Binding NonFrozenColumnsViewportHorizontalOffset, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"/>
                                            <ColumnDefinition Width="*"/>
                                        </Grid.ColumnDefinitions>
                                        <ScrollBar x:Name="PART_HorizontalScrollBar" Grid.Column="1" Maximum="{TemplateBinding ScrollableWidth}" Orientation="Horizontal" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Value="{Binding HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}" ViewportSize="{TemplateBinding ViewportWidth}"/>
                                    </Grid>
                                </Grid>
                            </ControlTemplate>
                        </ScrollViewer.Template>
                        <ItemsPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                    </ScrollViewer>
                </Border>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

您不能只在 XAML 中的现有模板中添加 InputBinding 到 en 元素而不定义完整的自定义模板。可能有更好的方法来做你想做的事情，例如使用@Andy 建议的an attached behaviour。

【讨论】：

谢谢，这就是我要找的。我将研究 AttachedProperty 方法。我想这两种方法的优缺点是另一天的讨论。