Get the description of a Enum value.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.Reflection;
using System.Text;
namespace LinkedIn.Utility
{
/// <summary>
/// A helper class for enums.
/// </summary>
public static class EnumHelper
{
/// <typeparam name="TValue">usually int</typeparam>
public static List<TValue> GetValues<TEnum, TValue>()
{
List<TValue> values = new List<TValue>();
Array array = Enum.GetValues(typeof(TEnum));
foreach (TValue item in array)
{
values.Add(item);
}
return values;
}
/// <summary>
/// Get the description of a <see cref="Enum" /> value.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>A description of the <see cref="Enum" /> value.</returns>
public static string GetDescription(Enum value)
{
FieldInfo fieldInfo = value.GetType().GetField(value.ToString());
DescriptionAttribute[] attributes =
(DescriptionAttribute[])fieldInfo.GetCustomAttributes(
typeof(DescriptionAttribute), false);
return (attributes.Length > 0) ? attributes[0].Description : value.ToString();
}
/// <summary>
/// </summary>
/// <typeparam name="TEnum"></typeparam>
/// <param name="enumeratedType"></param>
/// <param name="value"></param>
/// <returns></returns>
public static bool HasFlag<TEnum>(this TEnum enumeratedType, TEnum value)
where TEnum : struct, IComparable, IFormattable, IConvertible
{
if ((enumeratedType is Enum) == false)
{
throw new InvalidOperationException("Struct is not an Enum.");
}
if (typeof(TEnum).GetCustomAttributes(
typeof(FlagsAttribute), false).Length == 0)
{
throw new InvalidOperationException("Enum must use [Flags].");
}
long enumValue = enumeratedType.ToInt64(CultureInfo.InvariantCulture);
long flagValue = value.ToInt64(CultureInfo.InvariantCulture);
if ((enumValue & flagValue) == flagValue)
{
return true;
}
return false;
}
}
}
Related examples in the same category
