public static object ToDbValue(Enum value)
{
if (value == null)
{
return(null);
}
BidirHashtable <object, EnumValueAttribute> map
= EnumToAttributeMap(value.GetType());
return(map[value].DbValue);
}
public static object DbValueToEnum <T>(object dbValue)
{
if (Convert.IsDBNull(dbValue))
{
return(null);
}
else
{
BidirHashtable <object, object> map = EnumToDbValueMap(typeof(T));
return(map.ReverseLookup(dbValue));
}
}
public static object DisplayValueToEnum <T>(object displayValue)
{
BidirHashtable <object, EnumValueAttribute> map = EnumToAttributeMap(typeof(T));
foreach (string e in Enum.GetNames(typeof(T)))
{
if (map[Enum.Parse(typeof(T), e)].DisplayValue.Equals(displayValue))
{
return(Enum.Parse(typeof(T), e));
}
}
return(null);
}
private static BidirHashtable <object, object> EnumToDbValueMap(Type enumType)
{
BidirHashtable <object, object> retval
= new BidirHashtable <object, object>();
foreach (FieldInfo fi in enumType.GetFields())
{
if (fi.FieldType.BaseType == typeof(Enum))
{
EnumValueAttribute[] attrs =
(EnumValueAttribute[])fi.GetCustomAttributes(
typeof(EnumValueAttribute), false);
if (attrs.Length > 0)
{
retval.Add(Enum.Parse(enumType, fi.Name), attrs[0].DbValue);
}
}
}
return(retval);
}
