如何为以下情况创建一个泛型类型实例 [英] How to create a generic type instance for the following situation

问题描述

我有以下代码，请让我知道如何在运行时创建实例，而不必在编码时指定类型。

i have the following code, please let me know how to create the instance at runtime without specifying the type while coding.

MyObject productobject = something.

我需要

 AccessValuesFrom<long,double>,AccessValuesFrom<long,string>..etc

通常我可以创建下面的对象：

Generally i can create the object is below:

 AccessValuesFrom<long,double> accessData=productobject.ElementInfo.GetAccessValues<double>(something, something);

但我需要运行时的AccessValuesFrom。长是预定义的。如果没有直接创建实例的方式，那么如何为这种类型创建实例（我的情况是我必须调用

but i need the AccessValuesFrom at run time. long is pre-defined. how to create the instances for such type when there is no direct way of creating the instance(my situation i have to call

  productobject.ElementInfo.GetAccessValues<double>(something, something)

来创建instace。

to create the instace.

推荐答案

如果您此时有 Type 对象，则可以实现 GetAccessValues 像这样：

If you have a Type object at this point, you can implement GetAccessValues like this:

object GetAccessValues(Type type, something, something)
{
     var result = Activator.CreateInstance(
           typeof(AccessValuesFrom<,>).MakeGenericType(typeof(long), type));
     //do something with something
     return result;
}

也可以创建一个接口所有通用的 AccessValuesFrom 及其中的常用方法。

also it'll be good to create an interface for all generic AccessValuesFrom with common methods in it.

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