如何从泛型定义和泛型参数中获取泛型类型? [英] How to get generic type from generic definition and generic arguments?

问题描述

在 C# 中，如何从泛型定义和泛型参数中构造泛型类型

In C#, how can I construct generic type from generic definition and generic arguments like

var genericDefinition = typeof(List);
var genericArgument = typeof(string);
// How can I get the Type instance representing List<string> from the 2 variables above?

在我的用例中，泛型参数是动态解析的.这在 C# 中可能吗?提前致谢.

In my usecase, the generic argument is dynamically resolved. Is this possible in C#? Thanks in advance.

推荐答案

没有 typeof(List) 这样的东西.但是， typeof(List<>) 工作正常，并且是开放的泛型类型.然后你只需使用:

There's no such thing as typeof(List). However, typeof(List<>) works fine, and is the open generic type. Then you just use:

var genericDefinition = typeof(List<>);
var genericArgument = typeof(string);
var concreteListType = genericDefinition.MakeGenericType(new[] {genericArgument});

你应该发现concreteListType是typeof(List).

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