將控制檯應用程序轉換爲帶有進度條的窗體？

Question

我創建了一個控制檯應用程序，需要大約5分鐘的時間才能運行。主要方法需要大約10個方法來完成這項工作。

如何將控制檯應用程序更改爲Windows Forms應用程序，以更新進度條/顯示通過這10種方法的最新進度？

非常感謝！

Answer 1

您可以在Winforms中使用BackgroundWorker組件。只需複製粘貼此代碼即可。我已經使用了Label instead of ProgressBar。隨着任務在後臺進展，標籤將更新爲percentage completion。

耗時的方法/任務必須在Do_Work處理程序中調用。運行下面的示例。

using System.ComponentModel; 
using System.Windows.Forms; 

namespace WindowsFormsApplication1 
{ 
    public partial class Form3 : Form 
    { 
     private BackgroundWorker _worker; 
     BusinessClass _biz = new BusinessClass(); 
     public Form3() 
     { 
      InitializeComponent(); 
      InitWorker(); 
     } 

     private void InitWorker() 
     { 
      if (_worker != null) 
      { 
       _worker.Dispose(); 
      } 

      _worker = new BackgroundWorker 
      { 
       WorkerReportsProgress = true, 
       WorkerSupportsCancellation = true 
      }; 
      _worker.DoWork += DoWork; 
      _worker.RunWorkerCompleted += RunWorkerCompleted; 
      _worker.ProgressChanged += ProgressChanged; 
      _worker.RunWorkerAsync(); 
     } 

     /// Do the time consuming work here 
     void DoWork(object sender, DoWorkEventArgs e) 
     { 
      int highestPercentageReached = 0; 
      if (_worker.CancellationPending) 
      { 
       e.Cancel = true; 
      } 
      else 
      { 
       double i = 0.0d; 
       int junk = 0; 
       for (i = 0; i <= 199990000; i++) 
       { 
        int result = _biz.MyFunction(junk); 
        junk++; 

        // Report progress as a percentage of the total task. 
        var percentComplete = (int)(i/199990000 * 100); 
        if (percentComplete > highestPercentageReached) 
        { 
         highestPercentageReached = percentComplete; 
         // note I can pass the business class result also and display the same in the LABEL 
         _worker.ReportProgress(percentComplete, result); 
         _worker.CancelAsync(); 
        } 
       } 

      } 
     } 

     void RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) 
     { 
      if (e.Cancelled) 
      { 
       // Display some message to the user that task has been 
       // cancelled 
      } 
      else if (e.Error != null) 
      { 
       // Do something with the error 
      } 
     } 

     void ProgressChanged(object sender, ProgressChangedEventArgs e) 
     { 
      label1.Text = string.Format("Result {0}: Percent {1}",e.UserState, e.ProgressPercentage); 
     } 
    } 

    public class BusinessClass 
    { 
     public int MyFunction(int input) 
     { 
      return input+10; 
     } 
    } 
}