命名和可选参数 [英] Named and optional arguments

问题描述

大家好，



我的目的是对方法进行论证。这个论点将成为一个列表。但是这个参数将被用作可选参数，其默认值应该是一个空列表。我怎么声明呢？



例如

Hello all,

My purpose is to have an argument on a method. This argument is going to be a list. But this argument is going to be used as an optional argument and its default value should be a empty list. How can I declare it?

As an example

public void ExampleMethod(int required, string optionalstr = "default string",
    int optionalint = 10)

使用它

The usage of it

anExample.ExampleMethod(3, optionalint: 4); 

有关详细信息，请参阅 MSDN [ ^ ]

所以我需要类似

For more info you can see it in MSDN[^]
So I need something like

public void ExampleMethod(int required, List<string> optionalstrList = "????",
    int optionalint = 10)

推荐答案

public void Example(List<something> list = null) { /*...*/  }</something>

但我不确定能清楚地了解你的问题。

But I''m not sure to clearly understand what your problem is.

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