C# 中的方法重载和动态关键字
我还没有升级到 4.0，否则我会自己检查代码片段。但我希望有专家能够对此发表评论。
在下面的代码中，是否会在运行时调用适当的 Print() 方法？在 C# 2010 中这样称呼它是否合法？
public void Test()
{
dynamic objX = InstantiateAsStringOrDouble();
Print(objX);
}
public void Print(string s)
{
Console.Write("string");
}
public void Print(double n)
{
Console.Write("double");
}
谢谢！
I still haven't upgraded to 4.0 else I would have checked the code snippet myself. But I hope some expert can comment on this.
In following code, will the appropriate Print() method be called at runtime? Is it even legal in C# 2010 to call it that way?
public void Test()
{
dynamic objX = InstantiateAsStringOrDouble();
Print(objX);
}
public void Print(string s)
{
Console.Write("string");
}
public void Print(double n)
{
Console.Write("double");
}
Thanks!
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评论（2）
是的，这确实有效。它将在运行时检查动态的使用情况并调用适当的方法，但是您几乎会丢失所有编译时检查，因此我要确保这确实是您想要做的。
Yes, that does in fact work. It will check the usage of the dynamic at runtime and call the appropriate method, however you lose almost all of your compile-time checking, so I'd make sure that's really what you'd want to do.
是的，你甚至可以这样做：
或者
它会按预期工作。
Yes, and you can even do this:
or
and it will work as expected.