Posted by: Cirilo Meggiolaro | 10/15/2008

Tip of the day #1 – Using description with enumerators

If you are used to have enumerators in your application to describe numbers be aware that you can use a string to describe each item.

It’s not very common to use this kind of approach but here is how you can implement:

Namespaces

You’ll use the System.ComponentModel namespace to allow an attribute to be added to the enumerator item and the System.Reflection that will help us to get the description.

Code 1 – Namespaces




Enumerator

The enumerator looks like a regular enumerator except by the fact that now we have added a description attribute for each item.

Code 2 – Enumerator




Retrieving the Description

To retrieve the description we need to use the FieldInfo object that allows us to access the metadata and retrieve attributes of a field. Using the GetCustomAttributes method we can retrieve an array of attributes. Once you have the attributes, it’s just to get the description, as you can see on the next code sample:

Code 3 – Description method




Enjoy it!

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