C＃代表真实世界的用法 [英] C# Delegates Real World Usage

问题描述

我previously问有关委托的问题没有任何人有一个必须具备的场景，我就必须使用委托？这是如何提高我的C＃code？

I've previously asked a question of about Delegates does anyone have a must have scenario where I would have to use a delegate? How does this improve my C# code?

就在很多情况下我用它在我似乎总是能围绕它进行编程。

Just as many scenarios I use it in I've always seem to be able to program around it.

推荐答案

假设你不是在谈论事件 - 当然，你可以围绕它的方案。问题的关键是让它的更好和清洁

Assuming you're not talking about events - of course you can program around it. The point is to make it nicer and cleaner.

protected void Sort()
{
    foreach (string key in _dBase.Keys)
    {
      Array.Sort<Pair<string, Dictionary<string, T>>>(_dBase[key], 
            new Comparison<Pair<string, Dictionary<string, T>>>(
    	delegate(Pair<string, Dictionary<string, T>> a, Pair<string, Dictionary<string, T>> b)
    	{
    		if (a == null && b != null)
    			return 1;
    		else if (a != null && b == null)
    			return -1;
    		else if (a == null && b == null)
    			return 0;
    		else
    			return a.First.CompareTo(b.First);
    	}));
    }
}

我可以做，没有一个内联委托？当然。我会在我的课软盘私有方法，只会被用于这一个实例？是啊。

Could I do that without an inline delegate? Sure. Would I have a floppy private method in my class that would only be used for this one instance? Yup.

编辑：正如在评论中提到，您可以简化：

As mentioned in the comments, you can simplify:

Array.Sort<Pair<string, Dictionary<string, T>>>(_dBase[key], 
   new Comparison<Pair<string, Dictionary<string, T>>>(
   delegate(Pair<string, Dictionary<string, T>> a, Pair<string, Dictionary<string, T>> b)
   {

到

Array.Sort<Pair<string, Dictionary<string, T>>>(_dBase[key], (a,b) =>
   {

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