C#中静态索引器的可能性 [英] Possibility of static indexers in C#

问题描述

为什么C#索引器必须是实例成员?它们也可以是静态成员吗​​?

Why is it that C# indexers have to be instance members? Can they be static members too?

推荐答案

否，但是您可以非常接近.参见以下示例:

No, but you can come pretty close. See this example:

class Test
{
    static Dictionary<int, string> map = new Dictionary<int, string>();

    private Test() { }

    private static Test instance = new Test();

    internal static Test Instance
    {
        get { return Test.instance; }
    }

    public string this[int i]
    {
        get
        {
            return map[i];
        }

        set
        {
            map[i] = value;
        }
    }
}

用法示例:

Sample usage:

Test.Instance[3] = "hello";
string s = Test.Instance[3];

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