params 关键字可以指定在参数数目可变处采用参数的方法参数。在方法声明中的 params 关键字之后不允许任何其他参数,并且在方法声明中只允许一个 params 关键字。示例
// cs_params.cs
using System;
public class MyClass
{ public static void UseParams(params int[] list)
{
for ( int i = 0 ; i < list.Length ; i++ )
Console.WriteLine(list[i]);
Console.WriteLine();
} public static void UseParams2(params object[] list)
{
for ( int i = 0 ; i < list.Length ; i++ )
Console.WriteLine((object)list[i]);
Console.WriteLine();
} public static void Main()
{
UseParams(1, 2, 3);
UseParams2(1, 'a', "test"); int[] myarray = new int[3] {10,11,12};
UseParams(myarray);
}
}
输出
1
2
31
a
test10
11
12
// cs_params.cs
using System;
public class MyClass
{ public static void UseParams(params int[] list)
{
for ( int i = 0 ; i < list.Length ; i++ )
Console.WriteLine(list[i]);
Console.WriteLine();
} public static void UseParams2(params object[] list)
{
for ( int i = 0 ; i < list.Length ; i++ )
Console.WriteLine((object)list[i]);
Console.WriteLine();
} public static void Main()
{
UseParams(1, 2, 3);
UseParams2(1, 'a', "test"); int[] myarray = new int[3] {10,11,12};
UseParams(myarray);
}
}
输出
1
2
31
a
test10
11
12
也可以 test("a", "b", "c")