问题描述
我有这需要params对象的方法[],如:
I have a method which takes params object[] such as:
void Foo(params object[] items)
{
Console.WriteLine(items[0]);
}
当我传递两个对象数组这种方法,它工作正常:
When I pass two object arrays to this method, it works fine:
Foo(new object[]{ (object)"1", (object)"2" }, new object[]{ (object)"3", (object)"4" } );
// Output: System.Object[]
但是当我通过一个单一的对象[],它没有考虑我的对象[]作为第一个参数,而不是它需要的所有元素,比如我想要一个通过他们之一:
But when I pass a single object[], it does not take my object[] as the first param, instead it takes its all elements like I wanted to pass them one by one:
Foo(new object[]{ (object)"1", (object)"2" });
// Output: 1, expected: System.Object[]
我如何通过一个单一的对象[]作为第一个参数一个参数数组?
How do I pass a single object[] as a first argument to a params array?
推荐答案
一个简单的类型转换将确保编译器知道你在这种情况下,是什么意思。
A simple typecast will ensure the compiler knows what you mean in this case.
Foo((object)new object[]{ (object)"1", (object)"2" }));
作为一个数组对象的一个亚型,这一切都解决了。一个奇怪的解决方案位,虽然,我会同意。
As an array is a subtype of object, this all works out. Bit of an odd solution though, I'll agree.
编辑:Woops,typoed我的例子code
Woops, typoed my example code.
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