c# - C#BackgroundWorker取消检查点缩短

有没有办法缩短我的BackgroundWorker.CancellationPending检查点？

例如，是否可以像下面的示例代码一样封装return ？：

//REAL CODE (CURRENTLY USE THIS)
if (this.TW.CancellationPending)
    return;

//PSEUDO REPLACEMENT CODE
this.CkPt(CurrentMethod); //PSEUDO USAGE
    //^^^ PARAMETER IS A REFERENCE TO THE CURRENT METHOD, SIMILAR TO `this` FOR AN OBJECT
//OR MAYBE AN EXTENSION METHOD WOULD LOOK CLEANER
CurrentMethod.CkPt(); //PSEUDO USAGE

private void CkPt(Method m) //PSEUDO METHOD
{
    /*
        POSSIBLY PERFORM OTHER CHECKPOINT TASKS HERE
    */
    if (this.TW.CancellationPending)
        m.return/*FROM METHOD THAT CALLED ME*/;
}

我正在尝试使这样的多检查点情况更具可读性：

//PSUEDO METHOD
//DO NOT TAKE THIS AS REPEATING CODE
//IT IS ONLY MEANT TO SHOW MULTIPLE USES OF THE SAME CHECKPOINT
//MY REAL TASK METHOD(S) CONTAIN MANY MANY MANY AREAS THAT DON'T REPEAT AND REQUIRE CHECKPOINTS
public void FakeBWTask()
{
    if (this.TW.CancellationPending)
        return;

    foreach (var F1 in Fake1)
    {
        if (this.TW.CancellationPending)
            return;

        foreach (var F2 in Fake2)
        {
            if (this.TW.CancellationPending)
                return;
            foreach (var F3 in Fake3)
            {
                if (this.TW.CancellationPending)
                    return;
            }
        }
    }
}

谢谢你的帮助！！

最佳答案

无法调用methodA来调用methodB，而让methodB返回methodA（因为我们没有尾部递归）

考虑使用这样的迭代器。在某些情况下，您可以将try / catch放在检查点之间，这将起作用。

public void FakeBWTask()
{
   if (this.TW.CancellationPending)
      return;
   foreach (object ignore in FakeBWTaskSteps())
   {
      // Other checkpoint logic here....
      if (this.TW.CancellationPending)
          return;
   }
}

private IEnumerable<object> FakeBWTaskSteps()
{
   Part1();
   yield return null; // Execute checkpoint logic.

   Part2();
   yield return null; // Execute checkpoint logic.

   Part3();
   yield return null; // Execute checkpoint logic.

   Part4();
   yield return null; // Execute checkpoint logic.

   // Do some other stuff.
   yield return null; // Execute checkpoint logic.

   // final stuff.  No looping here.
}

关于c# - C#BackgroundWorker取消检查点缩短，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/6934307/