'objType'没有定义......实际上，它是，所以为什么会发生这种情况？

Question

As you seen in this picture below, for some reason my DirectCast wont except ANYTHING for the second argument. It says it requires a type, but, it won't take any object at all!

Thanks for any help! I'm using VB.net so all .net answers are acceptable :)

EDIT

Ok, so apparently I'm not giving it the right kind of type . Could somebody please clarify this? Assuming the type it needs to cast to is gridElement , what should I replace objType with?

Answer 1

DirectCast requires an object prototype (ie just giving it the intended class name) rather than a System.Type descriptor object. To cast an object using a System.Type , you will want to utilize CTypeDynamic() :

Return CTypeDynamic(createElementByIdAndLayer.MemberwiseClone(), objType)

The error is essentially telling you a class with the type name "objType" does not exist.

Answer 2

Its expecting a "Type", not a "Type Object".

What is the return value of the function?