Cast to generic type in C#

Question

I have a Dictionary to map a certain type to a certain generic object for that type. For example:

typeof(LoginMessage) maps to MessageProcessor

        

Answer 1

You can write a method that takes the type as a generic parameter:

void GenericProcessMessage(T message)
{
    MessageProcessor processor = messageProcessors[typeof(T)]
        as MessageProcessor;

    //  Call method processor or whatever you need to do
}

Then you need a way to call the method with the correct generic argument. You can do this with reflection:

public void ProcessMessage(object message)
{
    Type messageType = message.GetType();
    MethodInfo method = this.GetType().GetMethod("GenericProcessMessage");
    MethodInfo closedMethod = method.MakeGenericMethod(messageType);
    closedMethod.Invoke(this, new object[] {message});
}