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C# WPF-将GlobalResource耦合到ViewModel_C#_Wpf_Mvvm Light_Routedcommand - Fatal编程技术网

C# WPF-将GlobalResource耦合到ViewModel

C# WPF-将GlobalResource耦合到ViewModel,c#,wpf,mvvm-light,routedcommand,C#,Wpf,Mvvm Light,Routedcommand,我有一个在ResourceDictionary中定义的WPF应用程序,该应用程序在应用程序启动时添加到application.Current.Resources 我使用的是MVVM Light框架,我想将NotifyIcon上ContextMenu.MenuItems的命令属性绑定到ViewModel中定义的公共RelayCommand 我很习惯将视图耦合到ViewModel,但如何将全局资源耦合到ViewModel 这是我试图让这个工作,只是不知道我是否在正确的线路上或没有 运行此代码时,我收

我有一个在ResourceDictionary中定义的WPF应用程序,该应用程序在应用程序启动时添加到application.Current.Resources

我使用的是MVVM Light框架,我想将NotifyIcon上ContextMenu.MenuItems的命令属性绑定到ViewModel中定义的公共RelayCommand

我很习惯将视图耦合到ViewModel,但如何将全局资源耦合到ViewModel

这是我试图让这个工作,只是不知道我是否在正确的线路上或没有

运行此代码时,我收到一个错误,说明“找不到名为“Locator”的资源。资源名称区分大小写。这源自NotificationIconResources.xaml中TaskBarIcon标记上的DataContext绑定

SingleInstanceManager确保只能创建一个实例

    public sealed class SingleInstanceManager : WindowsFormsApplicationBase
{
    [STAThread]
    public static void Main(string[] args)
    {
        (new SingleInstanceManager()).Run(args);
    }

    public SingleInstanceManager()
    {
        IsSingleInstance = true;
    }

    public ControllerApp App { get; private set; }

    protected override bool OnStartup(StartupEventArgs e)
    {
        App = new ControllerApp();
        App.Run();
        return false;
    }

    protected override void OnStartupNextInstance(StartupNextInstanceEventArgs eventArgs)
    {
        base.OnStartupNextInstance(eventArgs);
        App.MainWindow.Activate();
        App.ProcessArgs(eventArgs.CommandLine.ToArray(), false);
    }
}
ControllerApp将替换App.xaml和App.xaml.cs

public class ControllerApp : Application
{
    public MainWindow window { get; private set; }
    bool startMinimized = false;
    private TaskbarIcon tb;

    public ControllerApp()
        : base()
    { }

    protected override void OnStartup(StartupEventArgs e)
    {
        base.OnStartup(e);

        DispatcherHelper.Initialize();

        ResourceDictionary dict = new ResourceDictionary();
        dict.Source = new Uri("NotificationIconResources.xaml", UriKind.Relative);
        Application.Current.Resources.MergedDictionaries.Add(dict);

        ViewModel.ViewModelLocator vmLocator = new ViewModel.ViewModelLocator();
        Application.Current.Resources.Add("Locator", vmLocator);

        window = new MainWindow();
        ProcessArgs(e.Args, true);

        //initialize NotifyIcon
        tb = (TaskbarIcon)FindResource("ItemNotifyIcon");

        if (startMinimized)
        {
            window.WindowState = WindowState.Minimized;
        }

        window.Show();
    }

    protected override void OnExit(ExitEventArgs e)
    {
        base.OnExit(e);

        tb.Dispose();
    }

    public void ProcessArgs(string[] args, bool firstInstance)
    {

    }
}
NotificationIconResources.xaml是定义NotifyIcon的资源字典

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:tb="http://www.hardcodet.net/taskbar">

    <tb:TaskbarIcon x:Key="ItemNotifyIcon"
                    IconSource="/Controller;component/Images/ItemRunning.ico"
                    IsNoWaitForDoubleClick="True"
                    ToolTipText="Item is running" 
                    DataContext="{Binding NotifyIcon, Source={StaticResource Locator}}">

        <tb:TaskbarIcon.ContextMenu>
            <ContextMenu>
                <MenuItem Header="Open Control Panel" />
                <Separator />
                <MenuItem Header="Start Item" Command="{Binding Path=StartServiceCommand}" />
                <MenuItem Header="Pause Item" />
                <MenuItem Header="Stop Item" Command="{Binding Path=StopServiceCommand}" />
                <Separator />
                <MenuItem Header="Close" />
            </ContextMenu>
        </tb:TaskbarIcon.ContextMenu>

    </tb:TaskbarIcon>
</ResourceDictionary>

NotifyIconViewModel包含我要绑定到的RelayCommand

    /// <summary>
/// This class contains properties that the NotifyIcon View can data bind to.
/// <para>
/// Use the <strong>mvvminpc</strong> snippet to add bindable properties to this ViewModel.
/// </para>
/// <para>
/// You can also use Blend to data bind with the tool's support.
/// </para>
/// <para>
/// See http://www.galasoft.ch/mvvm/getstarted
/// </para>
/// </summary>
public class NotifyIconViewModel : ViewModelBase
{
    private ServiceController sc;

    public string Welcome
    {
        get
        {
            return "Welcome to MVVM Light";
        }
    }

    /// <summary>
    /// Initializes a new instance of the NotifyIconViewModel class.
    /// </summary>
    public NotifyIconViewModel()
    {
        if (IsInDesignMode)
        {
            // Code runs in Blend --> create design time data.
        }
        else
        {
            sc = new ServiceController("Item");
        }
    }

    #region Public Commands

    private RelayCommand _startServiceCommand = null;

    public RelayCommand StartServiceCommand
    {
        get
        {
            if (_startServiceCommand == null)
            {
                _startServiceCommand = new RelayCommand(
                    () => this.OnStartServiceCommand(),
                    () => (sc.Status == ServiceControllerStatus.Stopped));
            }
            return _stopServiceCommand;
        }
    }

    private void OnStartServiceCommand()
    {
        try
        {
            sc.Start();
        }
        catch (Exception ex)
        {
            // notify user if there is any error
            AppMessages.RaiseErrorMessage.Send(ex);
        }
    }

    private RelayCommand _stopServiceCommand = null;

    public RelayCommand StopServiceCommand
    {
        get
        {
            if (_stopServiceCommand == null)
            {
                _stopServiceCommand = new RelayCommand(
                    () => this.OnStopServiceCommand(),
                    () => (sc.CanStop && sc.Status == ServiceControllerStatus.Running));
            }
            return _stopServiceCommand;
        }
    }

    private void OnStopServiceCommand()
    {
        try
        {
            sc.Stop();
        }
        catch (Exception ex)
        {
            // notify user if there is any error
            AppMessages.RaiseErrorMessage.Send(ex);
        }
    }

    #endregion

    ////public override void Cleanup()
    ////{
    ////    // Clean up if needed

    ////    base.Cleanup();
    ////}
}
//
///此类包含NotifyIcon视图可以绑定数据的属性。
/// 
///使用mvvminpc代码段将可绑定属性添加到此ViewModel。
/// 
/// 
///还可以在工具的支持下使用Blend进行数据绑定。
/// 
/// 
///看http://www.galasoft.ch/mvvm/getstarted
/// 
/// 
公共类NotifyIconViewModel:ViewModelBase
{
私人服务控制器sc;
公众欢迎
{
收到
{
返回“欢迎使用MVVM灯”;
}
}
/// 
///初始化NotifyIconViewModel类的新实例。
/// 
public NotifyIconViewModel()
{
如果(IsInDesignMode)
{
//代码在混合-->创建设计时数据中运行。
}
其他的
{
sc=新服务控制器(“项目”);
}
}
#地区公共指挥部
专用中继命令_startServiceCommand=null;
公共中继命令startService命令
{
收到
{
如果(_startServiceCommand==null)
{
_startServiceCommand=新的RelayCommand(
()=>this.OnStartServiceCommand(),
()=>(sc.Status==ServiceControllerStatus.Stopped));
}
返回_stopServiceCommand;
}
}
私有void OnStartServiceCommand()
{
尝试
{
sc.Start();
}
捕获(例外情况除外)
{
//如果有任何错误,请通知用户
AppMessages.RaiseErrorMessage.Send(ex);
}
}
private RelayCommand _stopServiceCommand=null;
公共中继命令StopServiceCommand
{
收到
{
如果(_stopServiceCommand==null)
{
_stopServiceCommand=newrelaycommand(
()=>this.OnStopServiceCommand(),
()=>(sc.CanStop&sc.Status==ServiceControllerStatus.Running));
}
返回_stopServiceCommand;
}
}
私有void OnStopServiceCommand()
{
尝试
{
sc.停止();
}
捕获(例外情况除外)
{
//如果有任何错误,请通知用户
AppMessages.RaiseErrorMessage.Send(ex);
}
}
#端区
////公共覆盖无效清除()
////{
//////如果需要,请清理
////base.Cleanup();
////}
}

鉴于您已经在应用程序级别声明了NotifyIcon,您将无法让它继承另一个视图的ViewModel,因为它不在任何视图的可视树中。最好的办法可能是为NotifyIcon提供自己的ViewModel,并在其上定义命令,然后处理ViewModels之间的通信,而不是跨UI


如果你需要它绑定到一个特定的视图的View模型,你也可以考虑在那个视图中声明它而不是全局的,在这种情况下它可以自动继承你想要使用的DATCONTY文本(但是它将用那个视图打开和关闭)。 我已经解决了这个问题

我从ControllerApp.cs中删除了以下行

    ViewModel.ViewModelLocator vmLocator = new ViewModel.ViewModelLocator();
    Application.Current.Resources.Add("Locator", vmLocator);
并将ViewModelLocator添加到ResourceDictionary(NotificationIconResources.xaml)中,如下所示


你好,约翰,谢谢你的回复。抱歉-在你回答我的问题时,我一定在补充更多细节。我想我已经做到了,它也遵循了你的建议,但是我被卡住了——你有没有机会回顾一下我刚才添加的代码?
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:tb="http://www.hardcodet.net/taskbar"
                xmlns:vm="clr-namespace:Controller.ViewModel">

<vm:ViewModelLocator x:Key="Locator"/>


    <tb:TaskbarIcon x:Key="ItemNotifyIcon"
                    IconSource="/Controller;component/Images/ItemRunning.ico"
                    IsNoWaitForDoubleClick="True"
                    ToolTipText="Item is running" 
                    DataContext="{Binding NotifyIcon, Source={StaticResource Locator}}">

        <tb:TaskbarIcon.ContextMenu>
            <ContextMenu>
                <MenuItem Header="{Binding Path=Item}" />
                <Separator />
                <MenuItem Header="Start Item" Command="{Binding Path=StartServiceCommand}" />
                <MenuItem Header="Pause Item" />
                <MenuItem Header="Stop Item" Command="{Binding Path=StopServiceCommand}" />
                <Separator />
                <MenuItem Header="Close" />
            </ContextMenu>
        </tb:TaskbarIcon.ContextMenu>

    </tb:TaskbarIcon>

</ResourceDictionary>