c# enum 枚举名称和ID 互换获取.................

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

 

 

 

 

public partial class Default2 : System.Web.UI.Page

{

    enum Colors { Red = 1, Green = 2, Blue = 4, Yellow = 8 };

    enum Direction

    {

        UP = 1,

        RIGHT = 2,

        DOWN = 3,

        LEFT = 4,

    };

    enum Days { Sat = 0, Sun, Mon, Tue, Wed, Thu, Fri };

 

 

    protected void Page_Load(object sender, EventArgs e)

    {

        ConvertEnum2DataTable( ((Enum) new Colors() ).GetType());

 

           int x = (int)Days.Sun; int y = (int)Days.Fri;

            Response.Write("Sun = {0}"+ x);

            Response.Write("Fri = {0}" + y);

 

            //由枚举enum的名称得到enum的值        

            Response.Write("<br>int: " + (int)Enum.Parse(typeof(Days), "Thu"));

            Response.Write("<br>TT: " +  (Days)Enum.Parse(typeof(Days), "Thu") );

 

            //根据ID获取枚举名称 1

            Response.Write("eee = {0}" + (Days)y);

            //根据ID获取枚举名称 2

            Response.Write("A:" + Enum.GetName(typeof(Days), y));

           

    }

    private DataTable ConvertEnum2DataTable(Type source)

        {

            DataTable dt = new DataTable();

            dt.Columns.Add("name");

            dt.Columns.Add("value");

 

            foreach (string name in Enum.GetNames(source))

            {

                DataRow dr = dt.Rows.Add();

                dr[0] = name;

                dr[1] =(int) Enum.Parse(source, name);

            }

            return dt;

        }

     

 

 

}