通用列表或不同类型的字典 [英] Dictionary of generic lists or varying types

问题描述

我想要一个字典，将字符串映射到不同类型的通用列表。即采用以下格式：

I want to have a Dictionary that maps strings to generic lists of varying types. i.e. in the following form:

Key        Value
string     List<T>
string     List<U>
string     List<V>
string     List<U>
...

当前我正在使用 Dictionary< string，IList> ，然后从每个字典 KeyValuePair< string，IList>中提取强类型列表。对条目，如下所示：

Currently I'm using a Dictionary<string, IList> and then extracted the strongly typed list from each dictionary KeyValuePair<string, IList> pair entry as follows:

Type layerType = pair.Value.GetType().GetGenericArguments()[0];
List<layerType> objectsClicked = pair.Value as List<layerType>;

是否有更好的方法？

如前所述，以上内容并未编译，对不起-这是您在仍在进行某些工作时提出问题时所得到的。
更多解释。我正在制作一个基本的空间数据查看器。最终视图由一组 Layer< T> s组成。每层都提供一个代表以渲染其类型（赋予偏移和比例）的委托，以及一种检查其对象在当前窗口中的方式。对于命中测试，我想要一个被击中对象的每一层的列表。该列表将是 Point 层的 List< Point> ，依此类推...所有的 Layer< T> s都将是强类型列表的集合。

As has been noted, the above doesn't compile, apologies - that's what you get when you ask a question while you're still working on somethings. Some more explanation. I'm making a basic spatial data viewer. The final view consists of a group of Layer<T>s. Each layer provides a delegate to render its type (given an offset and scale) and a way to check which of its objects are in the current window. For hit testing, I would like a List for each Layer of which objects have been hit. That list would be a List<Point> for a Point layer, etc... The grouping of the hits from all the Layer<T>s would then be a collection of strongly typed lists.

推荐答案

假设您使用的是C＃4， Dictionary< string，dynamic> 怎么样

How about Dictionary<string, dynamic> assuming you're on C# 4

Dictionary<string, dynamic> Dict = new Dictionary<string, dynamic>();
Dict.Add("int", new List<int>());
Dict.Add("string", new List<string>());

Dict["int"].Add(12);
Dict["string"].Add("str");

foreach (KeyValuePair<string, dynamic> pair in Dict) {
   Type T = pair.Value.GetType();
   Console.WriteLine(T.GetGenericArguments()[0].ToString());
}

打印出

System.Int32

System.Int32

System.String

System.String

这是您要找的东西吗？

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