在DataGrid中编辑后直接保存实体 [英] Save entity directly after edit in DataGrid

问题描述

我使用 DataGrid 将数据可视化给用户.编辑后，更新的数据应直接存储到数据库中，而无需使用任何保存"按钮.

I use a DataGrid to visualize my data to the user. After an edit, the updated data should be stored directly to the database, without using any 'Save' button.

到目前为止，这是我的解决方案，通过将 EventTrigger 用作 InvokeCommandAction :

This is my solution so far, which works for all DataGrid columns but the ComboBox by using an EventTrigger to InvokeCommandAction:

    <DataGrid ItemsSource="{Binding Path=Animals, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" SelectionMode="Single" AutoGenerateColumns="False" CanUserSortColumns="True">
        <i:Interaction.Triggers>
            <i:EventTrigger EventName="RowEditEnding">
                <i:InvokeCommandAction Command="{Binding SaveCommand}" />
            </i:EventTrigger>
        </i:Interaction.Triggers>
        <DataGrid.Columns>
            <DataGridTextColumn Header="EPC" Binding="{Binding Epc, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
            <DataGridTextColumn Header="Visual ID" Binding="{Binding VisualId, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
            <DataGridTextColumn Header="Geschlecht" Binding="{Binding Gender, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
            <DataGridTemplateColumn Header="Bucht">
                <DataGridTemplateColumn.CellTemplate>
                    <DataTemplate>
                        <ComboBox ItemsSource="{Binding DataContext.Pens, RelativeSource={RelativeSource AncestorType={x:Type view:AdministrationView}}}" DisplayMemberPath="Name" SelectedItem="{Binding Pen, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" SelectedValue="{Binding Pen.PenId}" SelectedValuePath="PenId"/>
                    </DataTemplate>
                </DataGridTemplateColumn.CellTemplate>
            </DataGridTemplateColumn>
        </DataGrid.Columns>
    </DataGrid>

更改组合框选择后如何在视图模型中调用SaveCommand?

或者是否有更简单的解决方案可完全实现我想要的行为(每次编辑后自动保存到数据存储区)?

Or is there an easier solution altogether to achieve my desired behaviour (auto save to data store after each edit)?

推荐答案

如果您仅添加另一个激活 ICommand 的 EventTrigger ，您将获得所需的行为，如下所示:

You get the desired behaviour if you just add another EventTrigger that activates your ICommand like that:

<DataGridTemplateColumn Header="Bucht">
        <DataGridTemplateColumn.CellTemplate>
            <DataTemplate>
                <ComboBox ItemsSource="{Binding DataContext.Pens, RelativeSource={RelativeSource AncestorType={x:Type view:AdministrationView}}}" DisplayMemberPath="Name" SelectedItem="{Binding Pen, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" SelectedValue="{Binding Pen.PenId}" SelectedValuePath="PenId">
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="SelectionChanged">
                            <i:InvokeCommandAction Command="{Binding DataContext.SaveCommand, RelativeSource={RelativeSource AncestorType={x:Type view:AdministrationView}}}" />
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </ComboBox>
            </DataTemplate>
        </DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>

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