進度條c＃ - 類似進程的加載

Question

你好，我有一個需要時間加載的函數。這就是爲什麼我打算在我的winform上放置一個進度條，以便用戶知道我的程序仍在運行。然而，我不知道我會如何解決它。有沒有人可以幫助指導我。

這裏就是我打算做的事：

private void btnProcess_Click(object sender, EventArgs e) 
     { 
      //function which takes time because it contacts to a server 
     } 

我想有一個進度條，其增量和我的過程完成之後結束。我應該使用背景工作嗎？

***我按照這個教程http://www.codeproject.com/Tips/83317/BackgroundWorker-and-ProgressBar-demo，但它並沒有等待一個特定的功能或事件完成像加載屏幕。

***在我的buttonclick事件完成其所有功能後，我的進度條並未結束。

我創建：

private void myBackgroundWorker_DoWork(object sender, DoWorkEventArgs e) 
     { 
      for (int i = 0; i <= 100; i++) 
      { 
       myBackgroundWorker.ReportProgress(i); 
       System.Threading.Thread.Sleep(100); 
      } 
     } 

private void myBackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e) 
     { 
      myProgressBar.Value = e.ProgressPercentage; 
     } 

private void btnProcess_Click(object sender, EventArgs e) 
      { 
       myBackgroundWorker.RunWorkerAsync(); 
       //function which takes time because it contacts to a server 
      } 

我怎麼會知道什麼時候我的ButtonClick事件會結束？這樣我的進度條也會結束嗎？

Answer 1

是的，你應該。這非常簡單。

使後臺工作人員執行任何工作btnProcess_Click做。

有它彙報進展：

worker.WorkerReportsProgress = true; 

現在你可以有這樣的進展報告您訂閱的事件觸發。

worker.ProgressChanged += new ProgressChangedEventHandler(worker_ProgressChanged); 

這樣做，你可以創建一個進度條可以比基於此worker_ProgressChanged事件，通過你的計算引發的自我更新。

你可以通過谷歌搜索找到大量的實現。祝你好運，希望這會有幫助。

Answer 2

這是兩個真正的好例子

http://www.dreamincode.net/forums/topic/112547-using-the-backgroundworker-in-c%23/

http://www.dreamincode.net/forums/topic/246911-c%23-multi-threading-in-a-gui-environment/

希望幫助

編輯：

public partial class Form1 : Form 
{ 
    //-------------------------------------------------------------------------- 
    public Form1() 
    { 
     InitializeComponent(); 

     //Initialize backgroundworker 
     Shown += new EventHandler(Form1_Shown); 
     backgroundWorker1.WorkerReportsProgress = true; 
     backgroundWorker1.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork); 
     backgroundWorker1.ProgressChanged += 
     new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged); 

     //counter 
     YourObject.Counter = 100; 
    } 

    //-------------------------------------------------------------------------- 
    void btnClick_Clicked(object sender, EventArgs e) 
    { 
     //Trigger the background process 
     backgroundWorker1.RunWorkerAsync(); 
    } 

    //-------------------------------------------------------------------------- 
    void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) 
    { 
     //Your freakishly long process, 
     //which needs to be run in the background 

     //to make it simple, I'll just do a for loop 
     for (int i = 0; i < 100; i++) 
     { 
      //The counter will keep track of your process 
      //In your case, it might not be a for loop 
      //So you will have to decide how to keep track of this counter 
      //My suggestion is to decrease/increase this counter 
      //right after importants action of your process 
      backgroundWorker1.ReportProgress(YourObject.Counter--); 
     } 
    } 

    void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e) 
    { 
     //The counter is updated and displayed with a progress bar 
     YourObject.Counter = e.ProgressPercentage; 
    } 
}