wpf - 带有 DatePicker 的 DataGridTemplateColumn 需要点击三下才能编辑日期

Question

我有一个DataGridTemplateColumn. 在它里面CellEditingTemplate，我放了一个DatePicker控件。现在如果我想编辑日期，我必须点击三下才能DatePicker开始编辑。有人可以告诉我如何DatePicker只需单击两次即可进入编辑模式吗？此外，如果DataGridTemplateColumn集中注意力，键盘输入也不会DatePicker进入编辑模式。如果也能修好就好了。

Answer 1

您必须按如下方式覆盖PrepareCellForEditin ：DataGridTemplateColumn

public class DataGridDateColumn:DataGridTemplateColumn
{
    protected override object PrepareCellForEdit(FrameworkElement editingElement,
                                                 RoutedEventArgs editingEventArgs)
    {
        editingElement.MoveFocus(new TraversalRequest(FocusNavigationDirection.First));
        return base.PrepareCellForEdit(editingElement, editingEventArgs);
    } 
}

XAML

<Custom:DataGrid x:Name="dgData" SelectionUnit="Cell" AutoGenerateColumns="False" CanUserAddRows="False">
    <Custom:DataGrid.Columns>
        <Custom:DataGridTextColumn Binding="{Binding Subject}" Header="Subject" Width="*"/>
        <Custom:DataGridTextColumn Binding="{Binding RaisedBy}" Header="Raised By" Width="100"/>

        <DatePickerDGWPF:DataGridDateColumn Header="Raised On" Width="250">
            <DatePickerDGWPF:DataGridDateColumn.CellTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding RaisedOn}" />
                </DataTemplate>
            </DatePickerDGWPF:DataGridDateColumn.CellTemplate>
            <DatePickerDGWPF:DataGridDateColumn.CellEditingTemplate>
                <DataTemplate>
                    <Custom:DatePicker SelectedDate="{Binding RaisedOn}"/>       
                </DataTemplate>
            </DatePickerDGWPF:DataGridDateColumn.CellEditingTemplate>
        </DatePickerDGWPF:DataGridDateColumn>
    </Custom:DataGrid.Columns>
</Custom:DataGrid>

Answer 2

一个更简单的解决方案是用网格包围日期选择器，并在 DatePicker 上设置 FocusManager……。

DataGridTemplateColumn.CellEditingTemplate>
    <DataTemplate>
       <Grid FocusManager.FocusedElement="{Binding ElementName=dPicker}">
           <DatePicker x:Name="dPicker"
                       SelectedDate="{Binding HistoryDate, Mode=TwoWay}"/>
       </Grid>
     </DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>