Description Attr

Question

it blows up at this line when i enter in 00AA or 0x00AA, i guess its not really possible to put a enumeraton out of order


string value = commonFunctions.GetTestName((Dictionary.Common.ValidtTest)Enum.Parse(typeof(Dictionary.Common.ValidTest), "00AA"));

   public enum ValidTest
    {
      [Description("TEST_A")] CAT = 0x0000,
      [Description("TEST_B")] DOG = 0x00AA,
      [Description("TEST_C")] BEAR = 0x0002,
    }

public string GetTestName(Enum eventValue)
    {
      ValidTest vtn = (ValidTest)eventValue;

      // Get the type
      Type type = eventValue.GetType();

      // Get fieldinfo for this type
      FieldInfo fieldInfo = type.GetField(vtn.ToString());

      // Get the stringvalue attributes
      DescriptionAttribute[] attribs = fieldInfo.GetCustomAttributes(
          typeof(DescriptionAttribute), false) as DescriptionAttribute[];


      // Return the first if there was a match.
      return attribs.Length > 0 ? attribs[0].Description : null;
    }

David Smith · Answer

Thanks bryan, instead I just kept it simple, i was trying to broaden my c sharp vocabulary i did something like this instead This works perfect commonFunctions .initDictionary(); string value = commonFunctions . ValidAnimalsNames ( "00AA" ); public class commonAnimals { static private Dictionary string , string > ValidAnimalsNames = new Dictionary string , string >(); static public void initDictionary() { ValidAnimalsNames .Add( "0000" , "CAT" ); ValidAnimalsNames .Add( "00AA" , "DOG" ); ValidAnimalsNames .Add( "0002" , "BEAR" ); } static public string Get ValidAnimalsName ( string key) { string value = string .Empty; if ( ValidAnimalsNames .ContainsKey(key)) { value = ValidAnimalsNames[key]; } return value; } }

Bryian Tan · Answer

Hello, [Description("TEST_A")] CAT = 0x0000, //value is 0 [Description("TEST_B")] DOG = 0x00AA, //value is 170 [Description("TEST_C")] BEAR = 0x0002, //value is 2 Enum.Parse(typeof(Dictionary.Common.ValidTest), "00AA") The above line is trying to look for the value "00AA" but not found. Try it with "0170" and it should return "TEST_B"