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using System;
using System.ComponentModel;
using System.Reflection;

/*
  Custom Type Converter Sample 3
  http://cyotek.com/blog/using-alternate-descriptions-for-enumeration-members
*/

namespace CustomTypeConverter3
{
  internal static class EnumExtensions
  {
    #region Class Members

    public static string GetDescription<T>(this T value) where T : struct
    {
      FieldInfo field;
      DescriptionAttribute attribute;
      string result;

      field = value.GetType().GetField(value.ToString());
      attribute = (DescriptionAttribute)Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute));
      result = attribute != null ? attribute.Description : string.Empty;

      return result;
    }

    public static T GetValue<T>(string value, T defaultValue)
    {
      T result;

      result = defaultValue;

      foreach (T id in Enum.GetValues(typeof(T)))
      {
        FieldInfo field;
        DescriptionAttribute attribute;

        field = id.GetType().GetField(id.ToString());
        attribute = Attribute.GetCustomAttribute(field, typeof(DescriptionAttribute)) as DescriptionAttribute;

        if (attribute != null && attribute.Description == value)
        {
          result = id;
          break;
        }
      }

      return result;
    }

    #endregion
  }
}