C# enum 枚举 反射 

枚举遍历
public enum EMyType  
{  
    [System.ComponentModel.Description("A类型")]  
    TypeA = 1,  
    [System.ComponentModel.Description("B类型")]  
    TypeB = 1,  
    [System.ComponentModel.Description("C类型")]  
    TypeC = 2,  
}    
接着遍历其枚举名的方法是
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foreach (var name in Enum.GetNames(typeof(EMyType)))  
{  
    Console.WriteLine(name);  
}  
接着遍历其枚举名与枚举值的方法是
[csharp] view plain copy 
foreach (var value in Enum.GetValues(typeof(EMyType)))  
{  
    Console.WriteLine(string.Format("{0}={1}", value.ToString(), Convert.ToInt32(value)));  
}  
接着遍历其枚举名，枚举值与描述属性的字符串的方法是
[csharp] view plain copy 
foreach (var value in Enum.GetValues(typeof(EMyType)))  
{  
    object[] objAttrs = value.GetType().GetField(value.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), true);  
    if (objAttrs != null &&   
        objAttrs.Length > 0)  
    {  
        DescriptionAttribute descAttr = objAttrs[0] as DescriptionAttribute;  
        Console.WriteLine(string.Format("[{0}]", descAttr.Description));  
    }  
    Console.WriteLine(string.Format("{0}={1}", value.ToString(), Convert.ToInt32(value)));  
}

枚举反射，根据枚举中的val或者data读取值和描述

举例实用：

 1             Type t = Assembly.Load("XXX.SDK").GetType("XXX.SDK.Entities." + ObjType);
 2             var dataList = new List<object>();
 3             foreach (var value in Enum.GetValues(t))
 4             {
 5 
 6                 object[] objAttrs = value.GetType().GetField(value.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), true);
 7                 DescriptionAttribute descAttr = objAttrs[0] as DescriptionAttribute;
 8                 var date = new
 9                 {
10                     Description = descAttr.Description,
11                     Name = value.ToString(),
12                     value = Convert.ToInt32(value)
13                 };
14                 dataList.Add(date);
15             }

根据枚举的名字，读出枚举的描述，内容和值。

 

       　　UserCardStatus userCardStatu = (UserCardStatus)Enum.Parse(typeof(UserCardStatus), result.user_card_status, true);
           string txt = GetEnumDescription(userCardStatu);


        public string GetEnumDescription(Enum enumValue)
        {
            string str = enumValue.ToString();
            FieldInfo field = enumValue.GetType().GetField(str);
            object[] objs = field.GetCustomAttributes(typeof(DescriptionAttribute), false);
            if (objs == null || objs.Length == 0) return str;
            DescriptionAttribute da = (DescriptionAttribute)objs[0];
            return da.Description;
        }

根据枚举的单个内容，读出描述

　　

posted @ 2016-08-11 15:24  Paras  阅读(8477)  评论(0)  编辑  收藏  举报