WPF Datagrid对鼠标单击进行响应，借助EventSetter

Posted 2021-01-21 sunbingqiang

在做的一个c#的项目中发现Datagrid没办法直接对鼠标单击进行响应，

调用MouseDown事件也需要点击某一行第二次才能响应。

所以借助EventSetter来简单的实现了一个。

界面部分的代码

        <DataGrid x:Name="dataGrid" HorizontalAlignment="Left" Margin="10,38,0,0"
                  VerticalAlignment="Top" Height="257" FontSize="13.333"
                  AutoGenerateColumns="False" AlternationCount="2" CanUserAddRows="False"
                  MinWidth="504" Width="513" SelectionUnit="FullRow">
            <DataGrid.RowStyle>
                <Style  TargetType="DataGridRow">
                    <EventSetter Event="GotFocus" Handler="Item_GotFocus"/>
                </Style>
            </DataGrid.RowStyle>
            <DataGrid.Columns>
                <DataGridCheckBoxColumn />
                <DataGridTextColumn Header="歌曲名" Width="200" Binding="{Binding Path=Title}" IsReadOnly="True"/>
                <DataGridTextColumn Header="艺术家" Width="127" Binding="{Binding Path=Artist}" IsReadOnly="True"/>
                <DataGridTextColumn Header="专辑" Width="140" Binding="{Binding Path=Album}" IsReadOnly="True"/>
            </DataGrid.Columns>
        </DataGrid>

对应的c#的代码

        private void Item_GotFocus(object sender, RoutedEventArgs e)
        {
            var item = (DataGridRow)sender;
            FrameworkElement objElement = dataGrid.Columns[0].GetCellContent(item);
            if (objElement != null)
            {
                CheckBox objChk = (CheckBox)objElement;
                objChk.IsChecked = !objChk.IsChecked;
            }
        }

附上用mousedown事件的代码

        private void DataGrid_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.LeftButton == MouseButtonState.Pressed)
            {
                var se = dataGrid.SelectedItem;
                FrameworkElement objElement = dataGrid.Columns[0].GetCellContent(se);
                if (objElement != null)
                {
                    CheckBox objChk = (CheckBox)objElement;
                    objChk.IsChecked = !objChk.IsChecked;
                }
            }
        }

需要在这个界面的构造函数中添加

 dataGrid.MouseDown += DataGrid_MouseDown;