using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
namespace WinBeginInvoke
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private delegate int Mydelegate();
private int Method()
{
Thread.Sleep(10000);
Random rad = new Random();
int i = rad.Next(1000);
return i;
}
private void MyMethodComplete(IAsyncResult asyncresult)
{
if (asyncresult == null)
return;
textBox1.Text = (asyncresult.AsyncState as Mydelegate).EndInvoke(asyncresult).ToString() ;
button1.Enabled = true;
}
private void button1_Click(object sender, EventArgs e)
{
Mydelegate my = Method;
button1.Enabled = false;
IAsyncResult result= my.BeginInvoke(MyMethodComplete, my);
if (!result.IsCompleted)
{
}
}
}
}