WPF 中的 经典的ModelView 通知页面更新 UI

view model

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using HPControls.Helper;

using System;

using System.ComponentModel;

using System.Threading;

using Xiaowei.Models;

using Xiaowei.Services;

using Xiaowei.Settings;

namespace Xiaowei.ViewModels

{

public class MuteViewModel : INotifyPropertyChanged

{

public event PropertyChangedEventHandler PropertyChanged;

public bool IsMuted

{

get { return LocalSettings.IsMuted; }

set

{

if(LocalSettings.IsMuted != value)

{

LocalSettings.IsMuted = value;

Property.Raise(this, PropertyChanged, "IsMuted");

}

}

}

public void Toggle()

{

_ = HPMetrics.Metrics.Track(LocalSettings.CustomerId, (int)HPMetrics.XwEventType.ClickButton,"MuteButton");

IsMuted = !IsMuted;

_ = ApplicationModel.Current.ToggleMute(IsMuted);

if(IsMuted)

{

StateManager.SetAttachState(StateManager.AttachStateEnum.micOff);

}

else

{

StateManager.RemoveAttachState(StateManager.AttachStateEnum.micOff);

}

}

public static MuteViewModel Get() => LazyInstance.Value;

private MuteViewModel()

{

Property.Raise(this, PropertyChanged, "IsMuted");

if (IsMuted)

{

StateManager.SetAttachState(StateManager.AttachStateEnum.micOff);

}

else

{

StateManager.RemoveAttachState(StateManager.AttachStateEnum.micOff);

}

}

private static readonly Lazy<MuteViewModel> LazyInstance = new Lazy<MuteViewModel>(()=>

{

return new MuteViewModel();

}, LazyThreadSafetyMode.ExecutionAndPublication);

}

}

Property 类

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using Windows.ApplicationModel.Core;

namespace HPControls.Helper

{

public static class Property

{

public static void Raise(object sender, PropertyChangedEventHandler handler, string property)

{

Run.Invoke(CoreApplication.MainView.CoreWindow.Dispatcher, () =>

{

handler?.Invoke(sender, new PropertyChangedEventArgs(property));

});

}

}

}