使用反射创建变量实例 [英] Creating an instance of variable with reflection
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问题描述
我想用反射创建一个类型为t的实例,即<预><代码>类型 t = typeof(string);字符串 s = (t)Activator.CreateInstance(t);//由于转换而失败string s = Activator.CreateInstance(t) as t//也失败
有没有办法执行这样的转换?谢谢.
解决方案
是的.您必须转换为string
,而不是t
.您可能需要一个通用方法,或者:
public T GetInstance(){类型 t = typeof(T);T s = (T)Activator.CreateIstance(t);返回 s;}
就目前情况而言,您正试图将一个实际上是 System.String
实例的对象强制转换为类型 System.Type
...
I want to create an instance of type t with reflection, that is
Type t = typeof(string);
string s = (t)Activator.CreateInstance(t); // this fails because of convertion
string s = Activator.CreateInstance(t) as t // also fails
Is there a way to perform such a convertion? Thanks.
解决方案
Yes. You have to convert to string
, not to t
. You may want a generic method, alternatively:
public T GetInstance<T>()
{
Type t = typeof(T);
T s = (T)Activator.CreateIstance(t);
return s;
}
As things stand you are attempting to cast an object that is actually an instance of System.String
to type System.Type
...
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