"这个"方法的两个定义

Question

是否可以为该this方法定义2个定义？我希望用户能够做到以下两点:string value = myBranch[stringKey];还有Branch child = myBranch[stringKey].

这可能吗？如果没有,你能否建议我如何设计我的课程以实现相同的外部交互(即,轻松访问子分支或值)？

public class Branch {
    public enum BranchType  {TYPE_BRANCH, TYPE_LEAF}
    private string key                              = null;
    private string value                            = null;
    private Branch parent                           = null;
    private Dictionary <string, Branch> children    = new Dictionary <string, Branch>();

    // Is it possible to have 2 'this' definitions?
    // Def 1:
    public Branch this[string attribKey] {
        get
        {
            if (this.children.ContainsKey(attribKey))
                return this.children[attribKey];

            return Branch.EmptyBranch;
        }
        set
        {
            children[attribKey] = value;
            value.Parent        = this;
            this.Type           = BranchType.TYPE_BRANCH;
        }
    }

    // Def 1:
    public string this[string attribKey] {
        get 
        { 
            return value; 
        }   
        set 
        {
            value = value;
        }
    }

    public string Key {
        get { return key; }
    }
}

Answer 1

不,重载的一个规则是Overloads只能通过返回值来区分.因为myBranch它可能是一本词典,所以它有时会返回一个string有时是一个有意义的词汇Branch.我会写两个函数:

GetBranchByKey并GetStringByKey解决过载问题.