Question

I am trying to call function dynamically here and passing argument, don’t know why it throws error there.

Assembly objAssembly;
objAssembly = Assembly.GetExecutingAssembly();

//get the class type information in which late bindig applied 
Type classType = objAssembly.GetType("Project." +strClassname);

//create the instance of class using System.Activator class 
object obj = Activator.CreateInstance(classType);

//fixed object  objValue[5];/* = new object[5];
object[] _objval = new object[3];

MethodInfo mi = classType.GetMethod("perFormAction");
mi.Invoke(obj, **_objval**); // Error here ..

I don’t know why it throws parameter count mismatch here.

Answer 1

Ok – so notice that the parameter to your method is a single parameter whose type is object array. Hence you need pass it in the same way. For example,

object[] _objval = new object[3];
....     // Fill the array with values to be supplied here
object[] parameters = new object[] { _objval }; // one parameter of type object array
...
mi.Invoke(obj, parameters);