将菜单项绑定到命令

本文关键字：命令 绑定 菜单项 | 更新日期: 2023-09-27 18:10:02

我正在尝试将命令绑定到视图模型，但它没有触发

    xmlns:ViewModel="clr-namespace:Lister.WPF.ViewModels"
    DataContext="{Binding ViewModel:TweetViewModel}" Icon="pack://siteoforigin:,,,/Resources/internet_down_16_hot.png" Loaded="Window_Loaded">
<Grid>
    <!--Test-->
    <DockPanel>
        <Menu DockPanel.Dock="Top">
            <MenuItem BorderThickness="5" Header="Status">
                <MenuItem BorderThickness="5" Header="Timeline" Command="{Binding  RefreshTweetsCommand}"/>
下面是VM 的代码
    private RelayCommand _refreshTweetsCommand;
    public RelayCommand RefreshTweetsCommand
    {
        get
        {
            return _refreshTweetsCommand ??
                   (_refreshTweetsCommand =
                    new RelayCommand(RefreshTweetList, LoadTweets));
        }
    }

将菜单项绑定到命令

DataContext="{Binding ViewModel:TweetViewModel}"这是无法绑定DataContext的

按如下方式设置DataContext:

<Window>
  <Window.DataContext>
    <ViewModel:TweetViewModel/>
  </Window.DataContext>
</Window>
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