使用 Case/Switch 和 GetType 来确定对象 [英] Using Case/Switch and GetType to determine the object

问题描述

可能的重复:
C# - 有没有更好的除了打开类型"之外，还有其他选择吗?

如果您想在某种类型的对象上切换，那么最好的方法是什么?

If you want to switch on a type of object, what is the best way to do this?

private int GetNodeType(NodeDTO node)
{
    switch (node.GetType())
    { 
        case typeof(CasusNodeDTO):
            return 1;
        case typeof(BucketNodeDTO):
            return 3;
        case typeof(BranchNodeDTO):
            return 0;
        case typeof(LeafNodeDTO):
            return 2;
        default:
            return -1;
    }
}

我知道这行不通，但我想知道您如何解决这个问题.在这种情况下，if/else 语句是否合适?

I know this doesn't work that way, but I was wondering how you could solve this. Is an if/else statement appropriate in this case?

或者你是否使用 switch 并将 .ToString() 添加到类型?

Or do you use the switch and add .ToString() to the type?

推荐答案

如果我真的必须在对象类型上switch，我会使用 .ToString().但是，我会不惜一切代价避免它:IDictionary 会做得更好，visitor 可能有点矫枉过正，但除此之外它仍然是一个完美的解决方案.

If I really had to switch on type of object, I'd use .ToString(). However, I would avoid it at all costs: IDictionary<Type, int> will do much better, visitor might be an overkill but otherwise it is still a perfectly fine solution.

这篇关于使用 Case/Switch 和 GetType 来确定对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！