在线程中调用具有返回类型或输出参数的方法 [英] Calling a method with return type or output prameter in thread

问题描述

朋友们，

我试图通过线程调用一些方法.我在asp.net中使用它.
方法如下:

 私有 无效 MethodName(字符串 strParam1，输出 字符串 strParam2，输出 字符串 strParam3)

 私有  int  MethodName(字符串 strParam1，字符串 strParam2)

我已尽力而为，但未找到任何解决方案.能给我一些建议吗?

谢谢您的期待.

亲切的问候，
Arshad Alam

解决方案

在这里看起来像一个类似的线程:

http://stackoverflow. com/questions/2642978/how-to-call-the-method-in-thread-with-aruguments-and-return-some-value [ ^ ]

处理线程的最简单方法是使用BackgroundWorker.请看以下内容:
http://www.dotnetperls.com/backgroundworker [基本背景工 [ class 程序 { 静态 无效 Main(字符串 []参数) { Func< int，> theFunc = 新 Func< int，> (GetThreadId); theFunc.BeginInvoke( 42 ，TheCallback，theFunc); Console.WriteLine(" ); Console.WriteLine(" + System.Threading.Thread.CurrentThread.ManagedThreadId.ToString( ))； Console.ReadKey(); } 静态 无效 TheCallback(IAsyncResult结果) { Func< int，> theFunc =(Func< int，> )result.AsyncState; Console.WriteLine(" + theFunc.EndInvoke(result)) ; Console.WriteLine(" + System.Threading.Thread.CurrentThread .ManagedThreadId.ToString()); Console.WriteLine(" ); } 静态 字符串 GetThreadId( int justAnInt) { 返回 System.Threading.Thread.CurrentThread.ManagedThreadId.ToString()+ " + justAnInt.ToString(); } }

输出:

工作. . .
起始线程为10
执行该函数的线程为11，仅一个int 42
打印该线程的线程为11
Finsihed. . 

如您所见，该方法也会在单独的线程上返回结果.您可以使用 ISynchronizeInvoke [ BackgroundWorker [ ^ ].
您可以选择重量级的线程对象 [ ThreadPool [任务 [任务并行库:1 of n [ ^ ].

希望这会有所帮助.

Hi friends,

i am trying to call some methods via threading. I am using it in asp.net.
methods are like:

private void MethodName(string strParam1, out string strParam2,out string strParam3)

private int MethodName(string strParam1,  string strParam2)

i have tried my best but not found any solution. can any give me some suggestion.

thanking you in anticipation.

warm regards,
Arshad Alam

解决方案

Looks like a similar thread here:

http://stackoverflow.com/questions/2642978/how-to-call-the-method-in-thread-with-aruguments-and-return-some-value[^]

The easiest way to deal with threading is to use the BackgroundWorker. Look at the following:
http://www.dotnetperls.com/backgroundworker[^]
or
Basic Backgroundworker[^]

Kind of depends where you need your result. You could make use of a delegate, as the following example shows.

class Program
{
   static void Main(string[] args)
   {
      Func<int,> theFunc = new Func<int,>(GetThreadId);
      theFunc.BeginInvoke(42, TheCallback, theFunc);
      Console.WriteLine("Working . . .");
      Console.WriteLine("Starting thread was " + System.Threading.Thread.CurrentThread.ManagedThreadId.ToString());
      Console.ReadKey();
   }

   static void TheCallback(IAsyncResult result)
   {
      Func<int,> theFunc = (Func<int,>)result.AsyncState;
      Console.WriteLine("The thread on which the function executed was " + theFunc.EndInvoke(result));
      Console.WriteLine("The thread on which this was printed was " + System.Threading.Thread.CurrentThread.ManagedThreadId.ToString());
      Console.WriteLine("Finished . . .");
   }

   static string GetThreadId(int justAnInt)
   {
      return System.Threading.Thread.CurrentThread.ManagedThreadId.ToString() + ", just an int " + justAnInt.ToString();
   }
}

Output:

Working . . .
Starting thread was 10
The thread on which the function executed was 11, just an int 42
The thread on which this was printed was 11
Finsihed . . .

As you see this method returns the result on a seperate thread as well. You could use an ISynchronizeInvoke[^] or something similiar to return to the calling thread though.

An alternative, as someone mentioned, could be a BackgroundWorker[^].
You could go hardcore with the quite heavyweight Thread Object[^].
Or go for the more lightweight ThreadPool[^].
Another option would be Tasks[^].
Sacha Barber actually wrote a nice series of articles on Tasks: Task Parallel Library: 1 of n[^].

Hope this helps.

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