internal static string ToString(T enumVal)
{
FieldInfo fi = enumVal.GetType().GetTypeInfo().GetDeclaredField(enumVal.ToString());
EnumStringAttribute stringAttr = fi.GetCustomAttribute <EnumStringAttribute>();
if (stringAttr != null)
{
return(stringAttr.Value);
}
else
{
return(string.Empty);
}
}
internal static bool TryGetEnumValue(string stringVal, out T result)
{
if (parseCount > Threshold)
{
if (stringToValueLookupTable == null)
{
// build a look up table to improve performance.
Dictionary <string, T> lookupTable = new Dictionary <string, T>();
Array values = Enum.GetValues(typeof(T));
foreach (T enumVal in values)
{
FieldInfo fi = enumVal.GetType().GetTypeInfo().GetDeclaredField(enumVal.ToString());
EnumStringAttribute stringAttr = fi.GetCustomAttribute <EnumStringAttribute>();
lookupTable.Add(stringAttr.Value, enumVal);
}
stringToValueLookupTable = lookupTable;
}
Debug.Assert(stringToValueLookupTable != null && stringToValueLookupTable.Count > 0);
return(stringToValueLookupTable.TryGetValue(stringVal, out result));
}
else
{
parseCount++;
Array values = Enum.GetValues(typeof(T));
foreach (T enumVal in values)
{
FieldInfo fi = enumVal.GetType().GetTypeInfo().GetDeclaredField(enumVal.ToString());
EnumStringAttribute stringAttr = fi.GetCustomAttribute <EnumStringAttribute>();
if (stringAttr != null && stringAttr.Value == stringVal)
{
result = enumVal;
return(true);
}
}
result = new T();
return(false);
}
}
