Winform中长时间处理时良好的交互界面呈现_多线程

下面是在此期间的交互窗体,交互窗体在耗时过程中，显示一个时间提示框，用于提示系统还在进一步计算中

下面这个窗体就是弹出的这个提示窗体，即用于提示用户：“我还没挂，正在努力加载中”信息的窗体

  public partial class formTimer : Form{        public formTimer()        {            InitializeComponent();        }        DateTime a = DateTime.Now;        private void formTimer_Load(object sender, EventArgs e)        {            label1.Text = (DateTime.Now - a).Seconds.ToString();            timer1.Enabled = true;        }        private void timer1_Tick(object sender, EventArgs e)        {            label1.Text = (DateTime.Now - a).Seconds.ToString();        }    }

为制作这个特殊的交互式窗体，把formTimer.dedigner.cs文件内容一并贴上来（主要是把该窗体的显示样式做一些特殊处理）

 partial class formTimer    {        /// <summary>        /// Required designer variable.        /// </summary>        private System.ComponentModel.IContainer components = null;        /// <summary>        /// Clean up any resources being used.        /// </summary>        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>        protected override void Dispose(bool disposing)        {            if (disposing && (components != null))            {                components.Dispose();            }            base.Dispose(disposing);        }        #region Windows Form Designer generated code        /// <summary>        /// Required method for Designer support - do not modify        /// the contents of this method with the code editor.        /// </summary>        private void InitializeComponent()        {            this.components = new System.ComponentModel.Container();            this.timer1 = new System.Windows.Forms.Timer(this.components);            this.panel1 = new System.Windows.Forms.Panel();            this.label1 = new System.Windows.Forms.Label();            this.panel1.SuspendLayout();            this.SuspendLayout();            //             // timer1            //             this.timer1.Interval = 1000;            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);            //             // panel1            //             this.panel1.BackColor = System.Drawing.Color.Transparent;            this.panel1.Controls.Add(this.label1);            this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;            this.panel1.Location = new System.Drawing.Point(0, 0);            this.panel1.Name = "panel1";            this.panel1.Size = new System.Drawing.Size(121, 66);            this.panel1.TabIndex = 0;            //             // label1            //             this.label1.AutoSize = true;            this.label1.BackColor = System.Drawing.Color.Transparent;            this.label1.Dock = System.Windows.Forms.DockStyle.Fill;            this.label1.Font = new System.Drawing.Font("SimSun", 30F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));            this.label1.ForeColor = System.Drawing.Color.Red;            this.label1.Location = new System.Drawing.Point(0, 0);            this.label1.Name = "label1";            this.label1.Size = new System.Drawing.Size(0, 40);            this.label1.TabIndex = 0;            //             // formTimer            //             this.BackColor = System.Drawing.Color.White;            this.ClientSize = new System.Drawing.Size(121, 66);            this.Controls.Add(this.panel1);            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;            this.MaximizeBox = false;            this.MinimizeBox = false;            this.Name = "formTimer";            this.ShowInTaskbar = false;            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;            this.TopMost = true;            this.TransparencyKey = System.Drawing.SystemColors.ControlText;            this.Load += new System.EventHandler(this.formTimer_Load);            this.panel1.ResumeLayout(false);            this.panel1.PerformLayout();            this.ResumeLayout(false);        }        #endregion        private System.Windows.Forms.Timer timer1;        private System.Windows.Forms.Panel panel1;        private System.Windows.Forms.Label label1;    }

 主窗体的调用处：模拟耗时操作

 public partial class DelegateBeginInvoke : Form    {        public DelegateBeginInvoke()        {            InitializeComponent();        }        //定义与方法同签名的委托           private delegate string DelegateName(int num, out int ret);        private delegate void DelegateA();        private delegate void Delegate赋值(string 值);        formTimer f = new formTimer();        //要进行异步的方法           private string MethodName(int num, out int ret)        {            ret = num;            System.Threading.Thread.Sleep(10000);//sleep10秒 模拟长时间操作            return "HelloWorld";        }        private void button1_Click(object sender, EventArgs e)        {            label1.Text = "";            //实例化委托并初赋值               DelegateName dn = new DelegateName(MethodName);            int i;            //实例化回调函数，把AsyncCallback看成是Delegate就懂了，实际上AsyncCallback是一种特殊的Delegate；回调函数，顾名思义就是新线程处理完成后的响应方法               AsyncCallback acb = new AsyncCallback(CallBackMethod);            //异步开始                //如果参数acb换成null则表示没有回调方法                //最后一个参数dn的地方，可以换成任意对象，该对象可以被回调方法从参数中获取出来，写成null也可以。               //参数dn相当于该线程的ID，如果有多个异步线程，可以都是null，但是绝对不能一样，不能是同一个object，否则异常                IAsyncResult iar = dn.BeginInvoke(1, out i, acb, dn);            textBox1.Text = Environment.UserName.ToString();            f = new formTimer();            f.Show();        }        //回调方法(异步完成时，执行的方法，此方法只有IAsyncResult一个参数，但是该参数几乎万能，可以传递Object)           private void CallBackMethod(IAsyncResult ar)        {            DelegateName dn = (DelegateName)ar.AsyncState;            int i;            string r = dn.EndInvoke(out i, ar);//一定要EndInvoke，否则你的下场很惨              DelegateA dd = new DelegateA(formClose);            if (f.InvokeRequired)                this.Invoke(dd);            else                formClose();            //MessageBox.Show("异步完成了！i的值是" + i.ToString() + ",r的值是" + r);            Delegate赋值 dd赋值 = new Delegate赋值(赋值);                 if (label1.InvokeRequired)            {                this.Invoke(dd赋值, new object[] { "异步完成了！i的值是" + i.ToString() + ",r的值是" + r });            }            else            {                textBox1.Text = "异步完成了！i的值是" + i.ToString() + ",r的值是" + r;            }        }        void formClose()        {            f.Close();//异步事件完成后，关闭交互窗体        }        void 赋值(string aa)        {            label1.Text = aa;//用于模拟回发时处理的方法        }    }