Extends.cs
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace HHECS.Model
{
public static class Extends
{
#region Enum
/// <summary>
/// 获取枚举成员的值(this是扩展方法的标志)
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static int GetIndexInt(this Enum obj)
{
return Convert.ToInt32(obj);
}
/// <summary>
/// 获取枚举成员的值(this是扩展方法的标志)
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static string GetIndexString(this Enum obj)
{
return Convert.ToInt32(obj).ToString();
}
public static T ToEnum<T>(this string obj) where T : struct
{
if (string.IsNullOrEmpty(obj))
{
return default(T);
}
try
{
return (T)Enum.Parse(typeof(T), obj, true);
}
catch (Exception)
{
return default(T);
}
}
/// <summary>
/// 获取指定枚举成员的描述
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static string ToDescriptionString(this Enum obj)
{
var attribs = (DescriptionAttribute[])obj.GetType().GetField(obj.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), false);
return attribs.Length > 0 ? attribs[0].Description : obj.ToString();
}
/// <summary>
/// 根据枚举值，获取指定枚举类的成员描述
/// </summary>
/// <param name="type"></param>
/// <param name="id"></param>
/// <returns></returns>
public static string GetDescriptionString(this Type type, int? id)
{
var values = from Enum e in Enum.GetValues(type)
select new { id = e.GetIndexInt(), name = e.ToDescriptionString() };
if (!id.HasValue) id = 0;
try
{
return values.ToList().Find(c => c.id == id).name;
}
catch
{
return "";
}
}
#endregion
}
}