C#异步分步调用

来源：互联网发布：ios 数组按长度切割编辑：程序博客网时间：2024/04/29 03:38

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Reflection;
namespace WindowsFormsApplication8
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            List<Label> lblist=new List<Label>();
            lblist.Add(label1);
            lblist.Add(label2);
            lblist.Add(label3);
            Service s = new Service() { lblist = lblist };
            s.rt += new Service.ShowData(s_rt);
            s.YearEnd("", "");
        }
        delegate void AddMsg(string msg,Label lab);
        void s_rt(string pre,Label lab)
        {
            AddMsg msg=new AddMsg(showmsg);
            lab.Invoke(msg, new object[] { pre,lab });
        }
        void showmsg(string msg,Label lab)
        {
            lab.Text = msg;
        }

    }
    public class Service
    {
        public delegate string GetData(string year, string code);
        public delegate void ShowData(string pre,Label lab);
        public event ShowData rt;
        public List<Label> lblist;


        public void YearEnd(string year, string code)
        {
            IMethod imethod = Factory.CreateMethod("First");
            GetData dg = new GetData(imethod.getData);
            rt("......", lblist[0]);
            IAsyncResult arg = dg.BeginInvoke(year, code, new AsyncCallback(callbackFirst), dg);
        }
        public void callbackFirst(IAsyncResult ar)
        {
            Commoncallback(ar, lblist[0], lblist[1],"Second");
        }
        void callbackSecond(IAsyncResult ar)
        {
            Commoncallback(ar, lblist[1], lblist[2], "Third");
        }
        void callbackThird(IAsyncResult ar)
        {
            Commoncallback(ar, lblist[2], lblist[2], "");
        }
        int i = 0;
        void Commoncallback(IAsyncResult ar,Label pre,Label next,string method)
        {
            i++;
            GetData dlg = (GetData)ar.AsyncState;
            string msg = dlg.EndInvoke(ar);
            rt(msg,pre);
            if (msg == "ok" && i<lblist.Count)
            {
                IMethod imethod = Factory.CreateMethod(method);
                GetData dg = new GetData(imethod.getData);
                rt("......", next);
                switch (i)
                {
                    case 1:
                        dg.BeginInvoke("", "", new AsyncCallback(callbackSecond), dg);
                        break;
                    case 2:
                        dg.BeginInvoke("", "", new AsyncCallback(callbackThird), dg);
                        break;

                }

            }
        }

    }
    public class Factory
    {
        public static IMethod CreateMethod(string name)
        {
            return (IMethod)Assembly.Load("WindowsFormsApplication8").CreateInstance("WindowsFormsApplication8." + name);
        }
    }

   public interface IMethod
    {
       string getData(string year,string code);
    }

    public class First:IMethod
    {
        public string getData(string year, string code)
        {
            Thread.Sleep(5000);
            return "ok";
        }
    }
    public class Second : IMethod
    {
        public string getData(string year, string code)
        {
            Thread.Sleep(5000);
            return "ok";
        }
    }
    public class Third : IMethod
    {
        public string getData(string year, string code)
        {
            Thread.Sleep(5000);
            return "ok";
        }
    }

}