相关疑难解决方法(0)

如何检查是否将可选参数传递给方法？

public void ExampleMethod(int required, string optionalstr = "default string",
    int optionalint = 10)
{

    if (optionalint was passed)
       return;
}

另一种方法是使用Nullable<T>.HasValue(MSDN定义,MSDN示例):

int default_optionalint = 0;

public void ExampleMethod(int required, int? optionalint,
                            string optionalstr = "default string")
{
    int _optionalint = optionalint ?? default_optionalint;
}