如何处理ThreadPool和成员变量？

发布于 2024-07-17 05:43:26 字数 704 浏览 5 评论 0原文

我对 .NET 中的 ThreadPool 有点陌生。我想知道，如果我只能将一个对象发送到我的回调方法，我如何才能访问类成员变量来调用其方法？（请参阅 CallBack() 中的 customClass）

我将如何从 customClass 加载数据？我是否将 customClass 传递给不同的 CallBack 方法？这种方法可以吗？

正如您所看到的，这有点缺乏经验，因此我们将不胜感激。

谢谢你，卡韦

class Program
           {
                static void Main(string[] args)
                {
                    CustomClass customClass = new CustomClass();

                ThreadPool.QueueUserWorkItem(CallBack, "Hello"); 


                Console.Read();
            }

            private static void CallBack(object state)
            {
                customClass.SaveData(state.ToString());
            }
        }

原文

I am a bit new to ThreadPool in .NET. I was wondering, if I can only send one object to my callback method, how am I able to access the class member variable to call its methods? (see customClass in CallBack())

And how would I load the data from customClass? Do I pass the customClass to a different CallBack method? is this approach alright?

As you can see it is a bit of lack of experience, so any tips along the way would really be appreciated.

Thank you,
Kave

class Program
           {
                static void Main(string[] args)
                {
                    CustomClass customClass = new CustomClass();

                ThreadPool.QueueUserWorkItem(CallBack, "Hello"); 


                Console.Read();
            }

            private static void CallBack(object state)
            {
                customClass.SaveData(state.ToString());
            }
        }

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生生漫 2024-07-24 05:43:26

class Program
{
  static void Main(string[] args)
  {
    CustomClass customClass = new CustomClass();
    ThreadPool.QueueUserWorkItem(x => CallBack(customClass, "Hello")); 
    Console.Read();
  }

  private static void CallBack(CustomClass custom, string text)
  {
    customClass.SaveData(text);
  }
}

class Program
{
  static void Main(string[] args)
  {
    CustomClass customClass = new CustomClass();
    ThreadPool.QueueUserWorkItem(x => CallBack(customClass, "Hello")); 
    Console.Read();
  }

  private static void CallBack(CustomClass custom, string text)
  {
    customClass.SaveData(text);
  }
}

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情深如许 2024-07-24 05:43:26

最简单的方法是使用闭包捕获您想要的所有变量（即使用匿名方法或 lambda 表达式）。如果使用循环，则需要小心捕获的确切内容，但它比传递对象并必须将其强制转换回正确的类型等更方便。

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酸甜透明夹心 2024-07-24 05:43:26

除了已经说过的内容之外：如果 CustomClass 在您的控制之下并且异步调用 SaveData 是常见用例，您可以考虑提供 SaveDataAsync 方法：

class CustomClass {

    public void SaveDataAsync(string path) {
        ThreadPool.QueueUserWorkItem(state => this.SaveData(path));
    }

    public void SaveData(string path) {
        ...
    }
}

请参阅基于事件的异步模式。

In addition to what has been said: If CustomClass is under your control and asynchronously invoking SaveData is a common use case, you could think about providing a SaveDataAsync method:

class CustomClass {

    public void SaveDataAsync(string path) {
        ThreadPool.QueueUserWorkItem(state => this.SaveData(path));
    }

    public void SaveData(string path) {
        ...
    }
}

See the Event-based Asynchronous Pattern.

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