Question

If it is possible, how could I check if a class exists based upon a string, and if that class does exist get a new instance of that object.

I have this method here that checks if an object has a method.

public static bool HasMethod(object objectToCheck, string methodName)
{
    Type type = objectToCheck.GetType();
    return type.GetMethod(methodName) != null;
} 

Then after that how could I check the parameters that a method takes?

Is this all possible?

---

Answer

To get the class:

public T GetInstance<T>(string namespace, string type)
{
    return (T)Activator.CreateInstance(Type.GetType(namespace + "." + type));
}

To get the method:

public static bool HasMethod(object objectToCheck, string methodName)
{
    Type type = objectToCheck.GetType();
    return type.GetMethod(methodName) != null;
} 

...

dynamic controller = GetInstance<dynamic>(controllerString);
if (HasMethod(controller, actionString))
{
    controller.GetType().GetMethod(actionString);
}

To get the parameters

MethodInfo mi = type.GetMethod(methodName);
if (mi != null)
{
    ParameterInfo[] parameters = mi.GetParameters();
    // The parameters array will contain a list of all parameters
    // that the method takes along with their type and name:
    foreach (ParameterInfo parameter in parameters)
    {
        string parameterName = parameter.Name;
        Type parameterType = parameter.ParameterType;
    }
}

Answer 1

You could use the GetParameters method on the MethodInfo instance you retrieved with the GetMethod method.

For example:

MethodInfo mi = type.GetMethod(methodName);
if (mi != null)
{
    ParameterInfo[] parameters = mi.GetParameters();
    // The parameters array will contain a list of all parameters
    // that the method takes along with their type and name:
    foreach (ParameterInfo parameter in parameters)
    {
        string parameterName = parameter.Name;
        Type parameterType = parameter.ParameterType;
    }
}