C# 中的标准委托 [英] Standard delegates in C#

问题描述

在 C# 中预定义了一些委托

There are some Delegates predefined in C#

我知道这些:

EventHandler // Default event callbacks
EventHandler<T> // Default event callbacks with custom parameter (inheriting from EventArgs)
Action // Function without return value and without parameter
Action<T1, T2, T3, T4> // Function without return value and 1-4 parameters
Func<T1, T2, T3, T4, TResult> // Methos with 0-4 parameters and one result type
Predicate<T> // equivalent to Func<T, bool>

对于特殊情况和框架的生成表单部分还有很多，但这些通常很适合用于自行编写的代码.

There are many more for special cases and generated form parts of the framework, but these are often good to use in self written code.

如果你知道一些更有用的添加它们.否则，这是回答.

If you know some more useful add them. Otherwise this is answered.

推荐答案

它们没有在 C# 中预定义.它们由框架定义.

They're not predefined in C#. They're defined by the framework.

Action 和 Func 委托系列比您所展示的要宽 - 它们上升到

The Action and Func delegate families are wider than you've shown - they go up to

Action<T1, T2, T3, T4>

和

Func<T1, T2, T3, T4, TResult>

.NET 2.0 中另一个常见的列表操作(在 LINQ 之前)是 Predicate<T>.

Another common-ish one in .NET 2.0 for list manipulation (before LINQ) is Predicate<T>.

使用线程:

ThreadStart
ParameterizedThreadStart
WaitCallback
TimerCallback
AsyncCallback

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