1、异步操作类

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.Remoting.Messaging;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using static System.Windows.Forms.AxHost;

namespace EapWindowApp
{
   
    internal class AsyncClass
    {
   
        //进度委托事件
        public delegate void ProgressChangedEventHandler(ProgressChangedEventArgs e);
        public event ProgressChangedEventHandler ProgressChanged;
        //完成委托事件
        public delegate void OperatingCompletedEventHandler(object sender,AsyncCompletedEventArgs e);
        public event OperatingCompletedEventHandler OperatingCompleted;
        //异步委托
        private delegate void OperatingHandler(AsyncOperation asyncOperation);
        private SendOrPostCallback OnProgressChangedDelegate;
        private SendOrPostCallback OnOperatingCompletedDelegate;
        /// <summary>
        /// 构造函数
        /// </summary>
        public AsyncClass() 
        {