加载Assembly并使用Reflection创建类

Question

I could not find a way of creating a class object from given type and assembly definition using reflection. For my case, I have a string containing class and assembly name and need to create the object:

string str = "My.Assembly.Namesapce.MyClass, My.Assembly.Namesapce, Version=4.0.0.0, Culture=neutral, PublicKeyToken=84474dc3c6524430";
var objClass = --SOME CODE TO USE  STR AND CREATE MyClass--

I have tried to split and create class but that is not very good way of doing it.

Answer 1

Type type = Type.GetType(str);
object objClass = Activator.CreateInstance(type);

however, to do anything useful with the object you will have to use a common interface / base-class, reflection, or dynamic .

Note: if you can type the variable as MyClass objClass , then the simpler version is of course:

MyClass objClass = new MyClass();

Answer 2

You need to do two things:

1) Convert your string str into a type, and 2) Create an instance of that type.

string typeString = "My.Assembly.Namesapce.MyClass, My.Assembly.Namesapce, Version=4.0.0.0, Culture=neutral, PublicKeyToken=84474dc3c6524430";

// Get a reference to the type.
Type theType = Type.GetType(typeString, true, false);

// Create an instance of that type.
MyClass  theInstance = (MyClass)Activator.CreateInstance(theType);