可选参数由[可选] C＃，检查args传递

Question

我有这样的类构造函数：

public Script(string scriptName, [Optional] ICollection<Tuple<string, bool>> internalFunctions, [Optional] long randomIdentifier) { }

那么，如何检查，是否在randomIdentifier或internalFunctions中传递了什么？ 那么，是

new Script("test1")

或

new Script("test1", null)

或

new Script("test1", null, 1)

称为？

谢谢。

Answer 1

如果没有显式传递值，那么这些参数将具有默认值，您必须自己测试这些值：

public Script(string scriptName, [Optional] ICollection<Tuple<string, bool>> internalFunctions, [Optional] long randomIdentifier)
{
    if (internalFunctions != null)
    {
        // do something that needs internalFunctions to have a value
    }

    if (randomIdentifier != 0)
    {
        // do something that needs randomIdentifier to have a valid value
    }
    else
    {
        // either a value wasn't passed, or the value 0 was passed...
        //   you can't be sure, so you might want to make this nullable
    }
}