返回進度狀態

Question

如何從下面返回進度狀態？我是否正確使用IProgress狀態？我曾假設某處會有一個Progress.report（）函數，但似乎並不存在。

 public static void Main() 
    { 
     Console.WriteLine("Running Async Methods"); 
     AsynchronousMethods am = new AsynchronousMethods(); 

     Progress<int> p = new Progress<int>(); 
     Task ta = am.asyncMethods(p); 


     while (!ta.IsCompleted) 
     { 
      // report progress 
      // I would liek to return the Progress here. I am not sure how? 
      // there doesnt seem to be a P.result 
     } 
     ta.Wait(); 
    } 


    public async Task asyncMethods(IProgress<int> pro) 
    { 
     await Task.Run(() => 
     { 
      for (int i = 0; i < 1999; i++) 
      { 
       Console.WriteLine("I is {0}", i); 
       pro.Report(i * 2); 
      } 
     }); 
    } 

Answer 1

您應該處理ProgressChanged事件

Progress<int> p = new Progress<int>(); 
p.ProgressChanged += p_ProgressChanged; 


static void p_ProgressChanged(object sender, int e) 
{ 
    Console.WriteLine("Progress :"+e); 
}