C# Enum Name String Description之间的相互转换

最近工作中经常用到Enum中Value、String、Description之间的相互转换，特此总结一下。

1.首先定义Enum对象

public enum Weekday
        {
            [Description("星期一")]
            Monday=1,
            [Description("星期二")]
            Tuesday=2,
            [Description("星期三")]
            Wednesday=3,
            [Description("星期四")]
            Thursday=4,
            [Description("星期五")]
            Friday=5,
            [Description("星期六")]
            Saturday=6,
            [Description("星期日")]
            Sunday=7
        }

2.根据string类型的值，获取相应的对象，例如：“Sunday”获取Weekday.Sunday.

public static Weekday GetEnumFromString(string str)
        {
            Weekday week;
            bool b = Enum.TryParse(str, true, out week);
            if (b)
                return week;
            else
                throw new Exception("没有找到对应的Enum");
        }

3.根据Value类型的值，获取对应的description。

public static String GetEnumDescription(Weekday week)
        {

            FieldInfo field = week.GetType().GetField(week.ToString());
            object[] obj = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
            DescriptionAttribute da;
            if (obj != null && obj.Length > 0)
            {
                da = (System.ComponentModel.DescriptionAttribute)obj[0];
                return da.Description;
            }
            else
                throw new Exception("没有找到对应的Description");
        }

4.根据Description的值，获取对应的Value。

 public static Weekday GetEnumFromDescription(string description)
        {
            foreach(Weekday week in Enum.GetValues(typeof(Weekday)))
            {
                if (description.Equals(GetEnumDescription(week))==true)
                    return week;
            }
            throw new Exception("没有找到对应的Enum");
        }