C# winform 使用進度條(兩種形式)

在用c#做WinFrom開發的過程中。我們經常需要用到進度條（ProgressBar）用於顯示進度資訊。這時候我們可能就需要用到多線程，如果不採用多線程式控制制進度條，視窗很容易假死（無法適時看到進度資訊）。下面我就簡單結合一個我寫的例子給大家做一個介紹。 第一步：設計介面不說了...注意需要引用 using System.Threading; 第二步：定義一個代理，用於更新ProgressBar的值（Value）         //更新進度列表         privatedelegatevoid SetPos(int ipos); 第三步：進度條值更新函數（參數必須跟聲明的代理參數一樣）         privatevoid 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：函數實現         privatevoid button1_Click(object sender, EventArgs e)          {              Thread fThread = new Thread(new ThreadStart(SleepT));//開闢一個新的線程              fThread.Start();          } 第五步：新的線程執行函數：         privatevoid SleepT()          {             for (int i = 0; i < 500; i++)              {                  System.Threading.Thread.Sleep(100);//沒什麼意思，單純的執行延時                  SetTextMessage(100 * i / 500);              }          }

 

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使用浮動進度條

1.浮動視窗

   /// <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.使用進度的視窗

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();