一個WinForm中的非同步例子

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 VS11{    public partial class FrmLogin : Form    {        public delegate void Action();        public FrmLogin()        {            InitializeComponent();        }        private void btnLogin_Click(object sender, EventArgs e)        {            Action action = new Action(this.Login);            action.BeginInvoke(null, null);        }        private void btnExit_Click(object sender, EventArgs e)        {            this.Close();        }        private void Login()        {            this.btnLogin.Invoke(new Action(() => { this.btnLogin.Enabled = false; }));            this.txtUserName.Invoke(new Action(() => { this.txtUserName.Enabled = false; }));            this.txtPassWord.Invoke(new Action(() => { this.txtPassWord.Enabled = false; }));            this.libMessage.Invoke(new Action(() => { this.libMessage.Text = "正在連結資料庫..."; }));            Thread.Sleep(1000);            this.libMessage.Invoke(new Action(() => { this.libMessage.Text = "正在查詢使用者表..."; }));            Thread.Sleep(1000);            this.libMessage.Invoke(new Action(() => { this.libMessage.Text = "正在驗證使用者名稱..."; }));            Thread.Sleep(1000);            this.libMessage.Invoke(new Action(() => { this.libMessage.Text = "正在驗證密碼..."; }));            Thread.Sleep(1000);            this.libMessage.Invoke(new Action(() => { this.libMessage.Text = "使用者登入成功..."; }));            this.btnLogin.Invoke(new Action(() => { this.btnLogin.Enabled = true; }));            this.txtUserName.Invoke(new Action(() => { this.txtUserName.Enabled = true; }));            this.txtPassWord.Invoke(new Action(() => { this.txtPassWord.Enabled = true; }));        }    }}