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));
            });
        }
    }
}