/// <summary>
/// Gets Enum Value's Description Attribute
/// </summary>
/// <param name="value">The value you want the description attribute for</param>
/// <returns>The description, if any, else it's .ToString()</returns>
public static string GetEnumDescription(Enum value)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
Type t = value.GetType();
if (enumLookup.ContainsKey(t))
{
EnumTuple et = enumLookup[t];
if (et.EnumToString.ContainsKey(value))
{
return(et.EnumToString[value]);
}
}
FieldInfo fi = t.GetField(value.ToString());
DescriptionAttribute[] attributes =
(DescriptionAttribute[])fi.GetCustomAttributes(
typeof(DescriptionAttribute), false);
return((attributes.Length > 0) ? attributes[0].Description : value.ToString());
}
/// <summary>
/// Constructor to create caches
/// </summary>
static EnumDescConverter()
{
Type[] types = Assembly.GetExecutingAssembly().GetTypes();
List <Type> enums = new List <Type>();
foreach (var type in types)
{
if (type.IsEnum)
{
//Add to cache
enums.Add(type);
}
}
foreach (var e in enums)
{
EnumTuple et = new EnumTuple();
et.EnumType = e;
FieldInfo[] fields = e.GetFields();
foreach (var fi in fields)
{
if (fi.FieldType == e)
{
DescriptionAttribute[] attributes =
(DescriptionAttribute[])fi.GetCustomAttributes(typeof(DescriptionAttribute), false);
Enum val = (Enum)fi.GetValue(fi.Name);
string strVal = attributes.Length > 0 ? attributes[0].Description : val.ToString();
if (!et.EnumToString.ContainsKey(val))
{
et.EnumToString.Add(val, strVal);
}
if (attributes.Length > 0)
{
et.DescriptionToEnum.Add(attributes[0].Description, val);
}
if (!et.NameToEnum.ContainsKey(val.ToString()))
{
et.NameToEnum.Add(val.ToString(), val);
}
}
}
enumLookup.Add(e, et);
}
}
/// <summary>
/// Gets the value of an Enum, based on it's Description Attribute or named value
/// </summary>
/// <param name="value">The Enum type</param>
/// <param name="description">The description or name of the element</param>
/// <returns>The value, or the passed in description, if it was not found</returns>
public static object GetEnumValue(Type value, string description)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
if (description == null)
{
description = string.Empty;
}
if (enumLookup.ContainsKey(value))
{
EnumTuple et = enumLookup[value];
if (et.DescriptionToEnum.ContainsKey(description))
{
return((object)et.DescriptionToEnum[description]);
}
if (et.NameToEnum.ContainsKey(description))
{
return((object)et.NameToEnum[description]);
}
}
FieldInfo[] fis = value.GetFields();
foreach (FieldInfo fi in fis)
{
DescriptionAttribute[] attributes =
(DescriptionAttribute[])fi.GetCustomAttributes(
typeof(DescriptionAttribute), false);
if (attributes.Length > 0)
{
if (attributes[0].Description == description)
{
return(fi.GetValue(fi.Name));
}
}
if (fi.Name == description)
{
return(fi.GetValue(fi.Name));
}
}
return(AgentDescription.None);
//throw new InvalidCastException(string.Concat("The received value ", description, " was unrecognized as an ", value.Name, " enum value."));
}
/// <summary>
/// Constructor to create caches
/// </summary>
static EnumDescConverter()
{
Type[] types = Assembly.GetExecutingAssembly().GetTypes();
List<Type> enums = new List<Type>();
foreach(var type in types)
{
if (type.IsEnum)
{
//Add to cache
enums.Add(type);
}
}
foreach (var e in enums)
{
EnumTuple et = new EnumTuple();
et.EnumType = e;
FieldInfo[] fields = e.GetFields();
foreach (var fi in fields)
{
if (fi.FieldType == e)
{
DescriptionAttribute[] attributes =
(DescriptionAttribute[]) fi.GetCustomAttributes(typeof (DescriptionAttribute), false);
Enum val = (Enum) fi.GetValue(fi.Name);
string strVal = attributes.Length > 0 ? attributes[0].Description : val.ToString();
et.EnumToString.Add(val, strVal);
if(attributes.Length > 0)
et.DescriptionToEnum.Add(attributes[0].Description, val);
et.NameToEnum.Add(val.ToString(), val);
}
}
enumLookup.Add(e, et);
}
}
