的BackgroundWorker C＃

Question

可能重複：
how to use a backgroundworker?

請點我要如何使用BackgroundWorker的或者什麼，我必須在應用程序做一些用來保持GUI凍結很好的說明漫長的過程？

Gui當我執行ping操作或其他任何操作時會凍結。只是很煩人，我想要顯示Ping不同主機的ping結果，但它會凍結，直到它停止ping列表中的所有主機。

Answer 1

這裏是一個example：

using System.ComponentModel; 
using System.Windows; 
using System.Windows.Controls; 

namespace SL_BackgroundWorker_CS 
{ 
    public partial class Page : UserControl 
    { 
     private BackgroundWorker bw = new BackgroundWorker(); 

     public Page() 
     { 
      InitializeComponent(); 

      bw.WorkerReportsProgress = true; 
      bw.WorkerSupportsCancellation = true; 
      bw.DoWork += new DoWorkEventHandler(bw_DoWork); 
      bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged); 
      bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted); 
     } 
     private void buttonStart_Click(object sender, RoutedEventArgs e) 
     { 
      if (bw.IsBusy != true) 
      { 
       bw.RunWorkerAsync(); 
      } 
     } 
     private void buttonCancel_Click(object sender, RoutedEventArgs e) 
     { 
      if (bw.WorkerSupportsCancellation == true) 
      { 
       bw.CancelAsync(); 
      } 
     } 
     private void bw_DoWork(object sender, DoWorkEventArgs e) 
     { 
      BackgroundWorker worker = sender as BackgroundWorker; 

      for (int i = 1; (i <= 10); i++) 
      { 
       if ((worker.CancellationPending == true)) 
       { 
        e.Cancel = true; 
        break; 
       } 
       else 
       { 
        // Perform a time consuming operation and report progress. 
        System.Threading.Thread.Sleep(500); 
        worker.ReportProgress((i * 10)); 
       } 
      } 
     } 
     private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) 
     { 
      if ((e.Cancelled == true)) 
      { 
       this.tbProgress.Text = "Canceled!"; 
      } 

      else if (!(e.Error == null)) 
      { 
       this.tbProgress.Text = ("Error: " + e.Error.Message); 
      } 

      else 
      { 
       this.tbProgress.Text = "Done!"; 
      } 
     } 
     private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e) 
     { 
      this.tbProgress.Text = (e.ProgressPercentage.ToString() + "%"); 
     } 
    } 
} 

Answer 2

BackgroundWorker worker = new BackgroundWorker(); 

public Form1() 
{ 
    InitializeComponent(); 

    worker.DoWork += worker_DoWork; 
    worker.RunWorkerCompleted += worker_RunWorkerCompleted; 
    worker.RunWorkerAsync();//Calls worker_DoWork on a separate thread. 
} 

void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)//Runs when worker_DoWork is completed. 
{ 
    // 
} 

void worker_DoWork(object sender, DoWorkEventArgs e) 
{ 
    // 
}