public static TAttribute GetEnumAttribute <[EnumConstraint] TEnum, TAttribute>(this TEnum value)
where TAttribute : Attribute
{
return(value.GetType()
.GetMember(value.ToString())
.First()
.GetCustomAttribute <TAttribute>());
}
public static string SetNullableValue <TEnum>(TEnum?enumValue) where TEnum : struct
{
if (enumValue.HasValue)
{
int val = (int)Enum.Parse(typeof(TEnum), enumValue.Value.ToString());
if (val < 0)
{
return(null);
}
}
return(enumValue?.ToString() ?? null);
}
public static string ToString <[EnumConstraint] TEnum>(TEnum enumValue, DisplayType displayType)
{
switch (displayType)
{
case DisplayType.Value:
return(enumValue.ToString());
case DisplayType.DisplayName:
return(enumValue.GetEnumAttribute <TEnum, DisplayAttribute>().Name);
case DisplayType.Description:
return(enumValue.GetEnumAttribute <TEnum, DescriptionAttribute>().Description);
case DisplayType.ResourceDisplayName:
DisplayAttribute displayAttribute = enumValue.GetEnumAttribute <TEnum, DisplayAttribute>();
ResourceManager resManager = new ResourceManager(displayAttribute.ResourceType);
return(resManager.GetString(displayAttribute.Name));
default:
return(string.Empty);
}
}