Question

I get the class name and method name as well as parameters via query string. I don’t know what is coming so I can’t say lets create this instance or that instance to pass it MethodInfo Invoke method so I need a generic solution. Here is the problem :

string className = Request.QueryString["className"];
string actionMethod = Request.QueryString["actionName"];

so I have to invoke a class method by the info above :

System.Reflection.MethodInfo info = Type.GetType(className).GetMethod(actionMethod);
info.Invoke(obj, null);

But since I don’t know what it is coming from the QueryString I can’t create an instance of the class of which I want to invoke the method.

How can I get over this problem…

Answer 1

If you know the assembly that contains the class you are invoking, you can use Assembly.CreateInstance(string) to create your instance of the class.

Code not tested

object myObject = Assembly.CreateInstance(typeName);
MethodInfo info = Type.GetType(className).GetMethod(actionMethod);
info.Invoke(myObject, null);

http://msdn.microsoft.com/en-us/library/system.reflection.assembly.createinstance.aspx