带有 Caliburn Micro 的 WPF 中 DataGrid 选定行的按钮操作

Question

我有一个DataGrid，每一行都有一个Button，它改变了行的特定列值。我正在使用Caliburn Micro，并且每一个都完美无缺。我想做的是将Button 放在DataGrid 之外。选择多行然后只按一个“按钮”后，列值会像以前一样发生变化，但这次是针对所有选定的行。以下是我当前代码中的几个 sn-ps：

DataView.xaml：

<DataGrid Grid.Row="1" x:Name="Changes" CanUserAddRows="False" 
        AutoGenerateColumns="False" AlternatingRowBackground="#FFF7F7F7">
    <DataGrid.Columns>
        <DataGridTextColumn ... />
        <DataGridTextColumn ... />
        <DataGridTemplateColumn CellStyle="{StaticResource DataGridCellCentered}" Header="Validation">
            <DataGridTemplateColumn.CellTemplate>
                <DataTemplate>
                    <Grid>
                        <Button  Margin="20 0 20 0" Visibility="{Binding DataContext.Validated, 
                        Converter={StaticResource BoolToVisConverter}, RelativeSource={RelativeSource AncestorType=DataGridCell}}"                              
                        cal:Message.Attach="[Event Click] = [Action Validate($this)]" Cursor="Hand"
                        cal:Action.TargetWithoutContext="{Binding DataContext, RelativeSource={RelativeSource AncestorType=DataGrid}}">
                            Validate
                        </Button>
                        <StackPanel Orientation="Horizontal" Margin="20 0 20 0"
                        Visibility="{Binding DataContext.Validiert, 
                        Converter={StaticResource BoolToVis}, RelativeSource={RelativeSource AncestorType=DataGridCell}}">
                            <TextBlock>Validated</TextBlock>
                            <Button Margin="20 0 0 0" Padding="10 0 10 0" FontSize="25" Foreground="#FF2F5778"                               
                            cal:Message.Attach="[Event Click] = [Action Unvalidate($this)]" Cursor="Hand"
                            cal:Action.TargetWithoutContext="{Binding DataContext, RelativeSource={RelativeSource AncestorType=DataGrid}}" >
                                ⮌
                            </Button>
                        </StackPanel>
                    </Grid>
                </DataTemplate>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>

DataViewModel.cs：

    public void Validate(ChangesModel model)
    {
         model.Validated= true;
         model.ValidateDate = DateTime.Now;
         model.ValidatedBy = LoggedUser.loggedUser;
         db.CheckValidate(model);
    }

    public void Unvalidate(ChangesModel model)
    {
         model.Validated= false;
         model.ValidateDate = null;
         model.ValidatedBy = null;
         db.UnCheckValidate(model);
    }

ChangesModel.cs：

public class ChangesModel : INotifyPropertyChanged
{
    private bool _validated;
    public bool Validated
    {
        get { return _validated; }
        set { _validated= value; NotifyPropertyChanged(); }
    }

    private DateTime? _validatedate;
    public DateTime? ValidateDate
    {
        get { return _validatedate; }
        set { _validatedate= value; NotifyPropertyChanged(); }
    }

    private string _validatedBy;
    public string ValidatedBy
    {
        get { return _validatedBy; }
        set { _validatedBy= value; NotifyPropertyChanged(); }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

有没有人建议我如何为Button 创建一个操作，以便它为DataGrid 的每个选定行触发Validate 方法？

Answer 1

您可以使用RowStyle 将行的IsSelected 属性绑定到ChangesModel 类的属性：

<DataGrid.RowStyle>
    <Style TargetType="{x:Type DataGridRow}">
        <Setter Property="IsSelected"  Value="{Binding IsSelected, Mode=TwoWay}"/>
    </Style>
</DataGrid.RowStyle>

然后你将按钮绑定到一个只遍历所选模型的动作，例如：

foreach (var model in Changes)
{
    if (model.IsSelected)
    {
        ...
    {
}