DatePicker是OneWay,但我需要TwoWay

Question

我在wpf中跟随DataGrid.

<DataGrid AutoGenerateColumns="False" Grid.Row="1" Name="adsGrid" ItemsSource="{Binding Path=Ads}" CanUserAddRows="False" CanUserDeleteRows="False" SelectionChanged="adsGrid_SelectionChanged">
            <DataGrid.Columns>
                <DataGridTextColumn Header="ID" Binding="{Binding Path=ID}" IsReadOnly="True" />
                <DataGridTextColumn Header="File" Binding="{Binding Path=FileName}" IsReadOnly="True" />                
                <DataGridTemplateColumn Header="Expiration date" IsReadOnly="True">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <DatePicker SelectedDate="{Binding Path=ExpirationDate}" />
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
                <DataGridTextColumn Header="Info" Width="100*" Binding="{Binding Path=Info}" />
            </DataGrid.Columns>
        </DataGrid>

问题是DateTime选择器不会更新相关对象,但会从中读取值.我已经尝试添加Mode = TwoWay,但它没有帮助.其他属性正确更新.

Answer 1

要调试这个我会尝试:

1. 检查ExpirationDate属性a DateTime(不是可空或DateTimeOffset？)
2. 设置 UpdateSourceTrigger=PropertyChanged
3. 添加转换器,并查看是否调用转换器