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Question by KoalaPanda54 · Jun 21, 2017 at 12:38 AM · arraysderived-class

Get class from an array of a base class with derived classes

Hi! So I have made an inventory system that stores items in a base class array (Item) which can have more classes that derive from it (Sword, Armor..). I tried (for testing) doing "Sword test = items[0] as Sword;" which works, but how do I know what class is in that array, since in this test I already knew that item 0 is a sword?

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Answer by thePeine · Jun 21, 2017 at 12:51 AM

If you want to get a string representation, you can call items[0].GetType().ToString(), which will return you the full type as a string, but that's of little value for more than debugging. Usually, you'll just have a large if block, something like the following.

 if(items[0] is Sword) {
     Sword test = items[0] as Sword;
 }

Or, if you actually want the type to display, it would probably be best to add a field to your base class, something like Description, that you can just hard code in each derived class.

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avatar image sleepandpancakes · Jun 21, 2017 at 01:04 AM 0
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"Or, if you actually want the type to display, it would probably be best to add a field to your base class, something like Description, that you can just hard code in each derived class."

This is essentially what I do. But ins$$anonymous$$d of a string, I create an enum that defines all the derived types, and return the enum value in a virtual property that is overridden in each derived class.

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