C＃中的2个参数未编译

Question

I'm trying to do this:

public void CustomMethod(params int[] number,params string[] names)
{
...
}

If i delete one of them , there is no problems , any idea of why i can't do this?

I have tried putting a normal parametre in the middle of both.

Answer 1

Only the last parameter can have params . See the documentation .

No additional parameters are permitted after the params keyword in a method declaration, and only one params keyword is permitted in a method declaration.

The reason is that allowing multiple params would give ambiguity. For example, what would this mean?

public void CustomMethod(params int[] foo, params int[] bar)
{
    ...
}

// ...

CustomMethod(1, 2);

Answer 2

This is simply not supported. The compiler can't know when one parameter list ends and the next begins.

Answer 3

据我所知，您只能在构造函数中编写一个params参数，该参数应该是构造函数的最后一个参数。

Answer 4

The params keyword lets you specify a method parameter that takes an argument where the number of arguments is variable.

No additional parameters are permitted after the params keyword in a method declaration, and only one params keyword is permitted in a method declaration.

See Here : http://msdn.microsoft.com/en-us/library/w5zay9db(v=VS.71).aspx