C# winform 使用进度条(两种形式)

在用c#做WinFrom开发的过程中。我们经常需要用到进度条（ProgressBar）用于显示进度信息。这时候我们可能就需要用到多线程，如果不采用多线程控制进度条，窗口很容易假死（无法适时看到进度信息）。下面我就简单结合一个我写的例子给大家做一个介绍。

第一步：设计界面不说了...注意需要引用 using System.Threading;
第二步：定义一个代理，用于更新ProgressBar的值（Value）

        //更新进度列表

        private
delegate void SetPos(int ipos);

第三步：进度条值更新函数（参数必须跟声明的代理参数一样）

        private
void SetTextMessage(int ipos)
         {
            if (this.InvokeRequired)
             {
                 SetPos setpos =
new SetPos(SetTextMessage);
                this.Invoke(setpos,
newobject[] { ipos});
             }
            else
             {
                this.label1.Text = ipos.ToString() +
"/100";
                this.progressBar1.Value = Convert.ToInt32(ipos);
             }
         }
第四步：函数实现

        privatevoid button1_Click(object sender, EventArgs e)
         {
             Thread fThread =
new Thread(new ThreadStart(SleepT));//开辟一个新的线程

             fThread.Start();
         }
第五步：新的线程执行函数：

        privatevoid SleepT()
         {
            for (int i = 0; i < 500; i++)
             {
                 System.Threading.Thread.Sleep(100);//没什么意思，单纯的执行延时

                 SetTextMessage(100 * i / 500);
             }
         }
=============================

使用浮动进度条

1.浮动窗口

   /// <summary>

        /// Increase process bar

        /// </summary>

        /// <param name="nValue">the value increased</param>

        /// <returns></returns>

        public bool Increase(int nValue)

        {

            if (nValue > 0)

            {

                if (prcBar.Value + nValue < prcBar.Maximum)

                {

                    prcBar.Value += nValue;

                    return true;

                }

                else

                {

                    prcBar.Value = prcBar.Maximum;

                    this.Close();

                    return false;

                }

            }

            return false;

        }

 

2.使用进度的窗口

     using System.Threading;

     private frmProcessBar myProcessBar = null;

     private delegate bool IncreaseHandle(int nValue);

     private IncreaseHandle myIncrease = null;

 

     private void ShowProcessBar()

        {

            myProcessBar = new frmProcessBar();

            // Init increase event

            myIncrease = new IncreaseHandle(myProcessBar.Increase);

            myProcessBar.StartPosition = FormStartPosition.CenterScreen;

            myProcessBar.ShowDialog();

            myProcessBar = null;

        }

        private void ThreadFun()

        {

            MethodInvoker mi = new MethodInvoker(ShowProcessBar);

            this.BeginInvoke(mi);

            Thread.Sleep(1000);//Sleep a while to show window

            bool blnIncreased = false;

            object objReturn = null;

            do

            {

                Thread.Sleep(50);

                objReturn = this.Invoke(this.myIncrease, new object[] { 2 });

                blnIncreased = (bool)objReturn;

            }

            while (blnIncreased);

        }

 

使用方法:

Thread thdSub = new Thread(new ThreadStart(ThreadFun));

    thdSub.Start();