Question

我使用WPF和MVVM design-patern，我需要绑定一个ItemsSource绑定父命令：查看：

<Window x:Class="TaskSupervisor.MainWindow"
        ...
        ...>
    <Window.DataContext>
        <local:TacheGroupeViewModel/>
    </Window.DataContext>
    <Grid>
        <TreeView x:Name="TachesTree" ItemsSource="{Binding TachesGroupes.GroupesConfig}">
            <TreeView.ItemTemplate>
                <HierarchicalDataTemplate ItemsSource="{Binding Value.Tasks}">
                    <HierarchicalDataTemplate.ItemTemplate>
                        <DataTemplate>
                            <Grid>
                              <CheckBox x:Name="InProgress" 
                                          IsChecked="{Binding ModifInProgress}">
                                </CheckBox>

                                <StackPanel Grid.Row="2" Grid.Column="2" Orientation="Horizontal">
                                    ...
                                </StackPanel>

                                <StackPanel Grid.Row="3" Grid.Column="2" Orientation="Horizontal">
                                    ...
                                </StackPanel>
                            </Grid>
                        </DataTemplate>
                    </HierarchicalDataTemplate.ItemTemplate>
                    <TextBlock Text="{Binding Value.DisplayGroupe, Mode=OneWay}"/>
                </HierarchicalDataTemplate>
            </TreeView.ItemTemplate>
        </TreeView>
    </Grid>
</Window>

ViewModel：

class TacheGroupeViewModel : INotifyPropertyChanged {

    public Model.TachesGroupes TachesGroupes { get; set; }

    public TacheGroupeViewModel() {
        this.TachesGroupes = new Model.TachesGroupes();
        // return a  Dictionary<string, CustomClass> Object
       // CustomClass => Contain some field and a List Of custom class
    }

    private ICommand _cmdEnCoursDeTraitement;
    public ICommand CmdEnCoursDeTraitement {
        get {
            return _cmdEnCoursDeTraitement ?? ( _cmdEnCoursDeTraitement = new RelayCommand(x => {Test(); }) );
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void RaisePropertyChanged(string propertyName) {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }


    public void Test() {
        var test = "xD";
    }
}

我想在我的Checkbox对象上进行绑定：如何在HierarchicalDataTemplate的Items源设置为＆＃34; Tasks＆＃34;我只能约束我的＆＃34;任务＆＃34; filds。如何获得ItemSource的父级？

Answer 1

而不是找到正确的父级和视图模型......我主要为上下文菜单设置了前向模式......

我的所有视图模型都有此命令

private ICommand forwardCommand;
    public ICommand ForwardCommand
    {
        get
        {
            if (forwardCommand == null)
                forwardCommand = new RelayCommand<string>(
                    delegate(string param)
                    {
                        Messenger.Default.Send<CommandContext>(GetForwardCommandContext(param),
                            ViewModelBaseMessages.ContextCommand );
                    },
                    delegate(string param)
                    {
                        return CanForwardCommand(param);
                    });
            return forwardCommand;
        }
    }

然后将其转发到已注册到forward_message

的视图模型

Messenger.Default.Register<CommandContext>(this, ViewModelBaseMessages.ContextCommand,
            (CommandContext o) =>
            {
                ExecuteDistantCommand( o );
            } );

您可以在github的项目中找到此代码请使用像mvvmlight这样的mvvm nuget，不要发明轮子......; - ）

WPF MVVM：绑定Child ItemSource

1 个答案: