枚举的强制类型转化通用泛型方法

public static T ParseEnum<T>(object oValue, T defaultValue)
        {
            if (oValue == null) return defaultValue;
            if (oValue.Equals('\0')) return (T)Convert.ChangeType(0, typeof(T));
            if (oValue is T) return (T)oValue;
            var sValue = oValue.ToString();
            if (string.IsNullOrEmpty(sValue))
                return defaultValue;
            try
            {
                var o = Enum.Parse(typeof(T), sValue);
                if (o == null)
                    return defaultValue;
                return (T)o;
            }
            catch (Exception error)
            {
                return defaultValue;
            }
        }