C#获得类型Generic< T>.给定T [英] C# get the the type Generic<T> given T

问题描述

我在C#中有一个通用类，如下所示:

I have a generic class in C#, like this:

   public class GenericClass<T> { ... }

现在，我有一个对象的 Type 对象，并且希望通过反射或其他方式获取 GenericClass< T>的 Type 对象; 其中T对应于该Type对象，而我有我的对象.

Now, I have the Type object for an object, and would like to, through reflection or otherwise, to get the Type object for GenericClass<T> where T corresponds to that Type object I have my object.

赞:

   Type requiredT = myobject.GetType();
   Type wantedType = typeof(GenericClass<requiredT>);

很明显，这种语法不起作用，但是我该怎么做呢?

Obviously this syntax doesn't work, but how do I do it?

推荐答案

是的，您可以:

Type requiredT = ...
Type genericType = typeof(GenericClass<>);
Type wantedType = genericType.MakeGenericType(requiredT);

这将为您提供 GenericClass< T> 类型对象，其中T对应于您的 requiredT .

This will give you the GenericClass<T> Type object, where T corresponds to your requiredT.

然后您可以使用 Activator 构造一个实例，如下所示:

You can then construct an instance using Activator, like this:

var instance = Activator.CreateInstance(wantedType, new Object[] { ...params });

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