Question

How do I append string to a type name then pass it as another type? Here is an example:

 public T Get<T>(int id)
        {
           return dbAccess.Get<T>(id);
        }

If I call this method like

SomeObject.Get<Class1>(1234);

I would like to change Class1 to be Class1Data by appending the string “Data” to any passed class, so the dbAccess.Get method would take the object as Class1Data as a conversion of Class1.

Answer 1

Something like this would work:

public T Get<T>(int id)
    {
        var newTypeName = typeof(T).FullName + "Data";
        var newType = Type.GetType(newTypeName);
        var argTypes = new [] { newType };
        var method = GetType().GetMethod("Get");
        var typedMethod = method.MakeGenericMethod(argTypes);
        return (T) typedMethod.Invoke(this, new object[] { id });
    }

In case your XxxData object don’t inherit from Xxx, you may want to do some automapping before returning the result.

Then you would have to replace the last line to:

        var dataResult = typedMethod.Invoke(this, new object[] { id });
        var result = new T(); // You will have to add a new() constraint on generic parameter
        // Map your dataResult object's values onto the result object's values
        return result;