将多个可选参数传递给 C# 函数
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/1996426/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Pass multiple optional parameters to a C# function
提问by Craig Schwarze
Is there a way to set up a C# function to accept any number of parameters? For example, could you set up a function such that the following all work -
有没有办法设置一个 C# 函数来接受任意数量的参数？例如，您是否可以设置一个功能，以便以下所有工作 -
x = AddUp(2, 3)
x = AddUp(5, 7, 8, 2)
x = AddUp(43, 545, 23, 656, 23, 64, 234, 44)
采纳答案by Jon Skeet
Use a parameter arraywith the paramsmodifier:
使用带有修饰符的参数数组params：
public static int AddUp(params int[] values)
{
int sum = 0;
foreach (int value in values)
{
sum += value;
}
return sum;
}
If you want to make sure there's at least onevalue (rather than a possibly empty array) then specify that separately:
如果您想确保至少有一个值（而不是可能为空的数组），请单独指定：
public static int AddUp(int firstValue, params int[] values)
(Set sumto firstValueto start with in the implementation.)
（在实现中设置sum为firstValue开始。）
Note that you should also check the array reference for nullity in the normal way. Within the method, the parameter is a perfectly ordinary array. The parameter array modifier only makes a difference when you callthe method. Basically the compiler turns:
请注意，您还应该以正常方式检查数组引用是否为空。在该方法中，参数是一个非常普通的数组。参数数组修饰符仅在您调用该方法时有所不同。基本上编译器变成：
int x = AddUp(4, 5, 6);
into something like:
变成类似的东西：
int[] tmp = new int[] { 4, 5, 6 };
int x = AddUp(tmp);
You cancall it with a perfectly normal array though - so the latter syntax is valid in source code as well.
你可以用一个完全正常的数组来调用它 - 所以后一种语法在源代码中也是有效的。
回答by Tarydon
回答by Pit J
1.You can make overload functions.
1.您可以制作重载功能。
SomeF(strin s){}
SomeF(string s, string s2){}
SomeF(string s1, string s2, string s3){}
More info: http://csharpindepth.com/Articles/General/Overloading.aspx
更多信息：http: //csharpindepth.com/Articles/General/Overloading.aspx
2.or you may create one function with params
2.或者你可以用参数创建一个函数
SomeF( params string[] paramArray){}
SomeF("aa","bb", "cc", "dd", "ff"); // pass as many as you like
More info: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/params
更多信息：https: //docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/params
3.or you can use simple array
3.或者你可以使用简单的数组
Main(string[] args){}
