Question

我尝试让用户在DataGrid内部的DataGrid中更改日期。两者都是ObservableCollections。

查看：

list_ = ['Id', 'PRICE', 'LATitude', 'longitude']
required_value = list_[location]

ViewModel updateOrderCommand使用newexecuteday覆盖执行日期并将其保存在数据库中。最后，它开始：

     <DataGrid VerticalContentAlignment="Center" CanUserAddRows="false" Grid.Row="0" Grid.Column="0" ItemsSource="{Binding ItemsCol, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" IsSynchronizedWithCurrentItem="True" EnableRowVirtualization="True" AutoGenerateColumns="False" Background="{DynamicResource PrimaryHueMidBrush}" SelectedItem="{Binding Items}" RenderTransformOrigin="0.5,0.5" Style="{DynamicResource MaterialDesignDataGrid}" IsReadOnly="true">
            <DataGrid.Columns>
   ...
   <DataGrid.RowDetailsTemplate>
                <DataTemplate>
                    ...
                            <DataGrid ScrollViewer.CanContentScroll="False" ItemsSource="{Binding PlanList, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" CanUserAddRows="False" VerticalContentAlignment="Bottom" AutoGenerateColumns="false" SelectedItem="{Binding RelativeSource={RelativeSource AncestorType={x:Type UserControl},Mode=FindAncestor}, Path=DataContext.SelectedPlan}" Background="{DynamicResource PrimaryHueDarkBrush}" Style="{DynamicResource MaterialDesignDataGrid}" IsReadOnly="false">
                                <DataGrid.Columns>
                                    <DataGridTemplateColumn Header="Bearbeitungstag">
                                        <DataGridTemplateColumn.CellTemplate>
                                            <DataTemplate>
                                                <TextBlock Text="{Binding executeDay, ValidatesOnDataErrors=True, UpdateSourceTrigger=PropertyChanged, Mode=OneWay,StringFormat={}{0:dd/MM/yyyy}}"/>
                                            </DataTemplate>
                                        </DataGridTemplateColumn.CellTemplate>
                                        <DataGridTemplateColumn.CellEditingTemplate>
                                            <DataTemplate>
                                                <DatePicker SelectedDate="{Binding RelativeSource={RelativeSource AncestorType={x:Type UserControl},Mode=FindAncestor},Path=DataContext.newexecuteDay, ValidatesOnDataErrors=True, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay,StringFormat={}{0:dd/MM/yyyy}}"/>
                                            </DataTemplate>
                                        </DataGridTemplateColumn.CellEditingTemplate>

                                    </DataGridTemplateColumn>
                                          <DataGridTemplateColumn Header="">
                                        <DataGridTemplateColumn.CellTemplate>
                                            <DataTemplate >

                                                <Button Command="{Binding RelativeSource={RelativeSource AncestorType={x:Type UserControl},Mode=FindAncestor},Path=DataContext.updateOrderCommand}" VerticalAlignment="Center" Style="{DynamicResource MaterialDesignFlatButton}">
                                                    <Viewbox Stretch="Fill">
                                                        <Canvas Width="24" Height="24">
                                                            <Path Data="M15,9H5V5H15M12,19A3,3 0 0,1 9,16A3,3 0 0,1 12,13A3,3 0 0,1 15,16A3,3 0 0,1 12,19M17,3H5C3.89,3 3,3.9 3,5V19A2,2 0 0,0 5,21H19A2,2 0 0,0 21,19V7L17,3Z" Fill="{DynamicResource SecondaryAccentBrush}" />
                                                        </Canvas>
                                                    </Viewbox>
                                                </Button>
                                            </DataTemplate>
                                        </DataGridTemplateColumn.CellTemplate>
                                    </DataGridTemplateColumn>

                                   ...

                                </DataGrid.Columns>
                            </DataGrid>

此时，代码崩溃了

System.Windows.Markup.XamlParseException：“” DeferRefresh“ ....

在AddNew或EditItem事务中是不允许的（免费翻译未找到英语异常：-/）

我已经尝试过

CollectionViewSource.GetDefaultView(ItemsCol).Refresh();

然后不允许“刷新”。我为第一个DataGrid尝试了一些CodeBehind CommitEdit（）和CancelEdit（）。

我认为我必须中止UI内的编辑模式，但是如何在MVVM环境或RowDetailsTemplate中使用

？

TwoWay MVVM绑定数据模板

0 个答案: