如何编写一个函数采取任何物体与索引运算符 [英] how to write a function to take any object with an index operator

问题描述

我觉得我已经在C的情况下问这个++在过去的（不能在我的问题！历史上找到它）和解决方案是使用一个模板函数。由于在编译的时候C ++模板的决心，它的工作原理。但对于C＃，它没有

I think I have asked this in the context of C++ (Can't find it in my question history!!) in the past and the solution was to use a template function. As C++ template resolve at compile time, it works. But for C#, it doesn't.

public Hashtable ConvertToHashtable<T>(T source) where T has an index operator
{
    Hashtable table = new Hashtable();
    table["apple"] = source["apple"];

    return table;
}

目前的一个用法是将结果转换成OleDbReader到哈希表，但。我forseeing更多的源类型很快需要

One usage at the moment is to convert the result in OleDbReader to hashtable, but I am forseeing the need for more source types soon.

推荐答案

有没有通用的类型约束的在C＃中运营商 - 这是在C＃泛型的限制之一

There are no generic type constraints for operators in C# - it is one of the limitations of generics in C#.

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