新建消息事件

添加文件：Mytodo.Common.Events.MessageModel.cs

using Prism.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Diagnostics;namespace Mytodo.Common.Events
{public class MessageModel{public string Filter { get; set; }public string Message { get; set; }}public class MessageEvent:PubSubEvent<MessageModel>{}
}

注册、发送提示消息

/// <summary>
/// 注册提示消息 
/// </summary>
/// <param name="aggregator"></param>
/// <param name="action"></param>
public static void ResgiterMessage(this IEventAggregator aggregator,Action<MessageModel> action, string filterName = "Main")
{aggregator.GetEvent<MessageEvent>().Subscribe(action,ThreadOption.PublisherThread, true, (m) =>{return m.Filter.Equals(filterName);});
}/// <summary>
/// 发送提示消息
/// </summary>
/// <param name="aggregator"></param>
/// <param name="message"></param>
public static void SendMessage(this IEventAggregator aggregator, string message, string filterName = "Main")
{aggregator.GetEvent<MessageEvent>().Publish(new MessageModel(){Filter = filterName,Message = message,});
}

UI增加Snackbar

修改文件：Mytodo.Views.MainView.xaml

</materialDesign:DrawerHost.LeftDrawerContent>
<Grid><Grid.RowDefinitions><RowDefinition Height="auto" /><RowDefinition /></Grid.RowDefinitions><materialDesign:Snackbarx:Name="skbar"Panel.ZIndex="1"MessageQueue="{materialDesign:MessageQueue}" /><materialDesign:ColorZone

注册消息

修改文件：Mytodo.Views.MainViewcs 构造函数添加

要注意的是，我们要发送的是文本，所以，this.skbar.MessageQueue.Enqueue函数内发送的是文本。

aggregator.ResgiterMessage(arg =>{this.skbar.MessageQueue.Enqueue(arg.Message);});

在需要的地方推送消息

aggregator.SendMessage("已完成!");