附上源代码：

1 using System; 2 using System.Collections.Generic; 3 using System.Data; 4 using System.Linq; 5 using System.Text; 6 using System.Threading.Tasks; 7  8 namespace 反射_特性 9 {10     [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = false)]11     public class FieldAttribute : Attribute12     {13         private string _Fields;14         /// 
15         /// 字段名称 keleyi.com16         /// 
17         public string Fields18         {19             get { return _Fields; }20 21         }22 23         private DbType _Dbtype;24         /// 
25         /// 字段类型26         /// 
27         public DbType Dbtype28         {29             get { return _Dbtype; }30 31         }32 33         private int _ValueLength;34         /// 
35         /// 字段值长度36         /// 
37         public int ValueLength38         {39             get { return _ValueLength; }40 41         }42         /// 
43         /// 构造函数44         /// 
45         ///  字段名46         ///  字段类型47         ///  字段值长度48         public FieldAttribute(string fields, DbType types, int i)49         {50 51             _Fields = fields;52             _Dbtype = types;53             _ValueLength = i;54         }55     }56 }

2:表名特性

1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6  7 namespace 反射_特性 8 { 9     [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = false)]10     public class TableAttribute : Attribute11     {12         private string _TableName;13         /// 
14         /// 映射的表名15         /// 
16         public string TableName17         {18             get { return _TableName; }19         }20         /// 
21         /// 定位函数映射表名；22         /// 
23         /// 24         public TableAttribute(string table)25         {26             _TableName = table;27         }28     }29 }

3:特性测试类

1 using System;  2 using System.Collections.Generic;  3 using System.Data;  4 using System.Linq;  5 using System.Text;  6 using System.Threading.Tasks;  7   8 namespace 特性_反射  9 { 10     [Table("Consumers")] 11     public class UserInf 12     { 13         private string _UserID; 14         /// 
 15         /// 登陆ID 16         /// 
 17         [Field("ConsumerID", DbType.String, 12)] 18         public string U_UserID 19         { 20             get { return _UserID; } 21             set { _UserID = value; } 22         } 23  24         private string _Psw; 25         /// 
 26         /// 登陆密码 27         /// 
 28         [Field("ConsumerPwd", DbType.String, 12)] 29         public string U_Psw 30         { 31             get { return _Psw; } 32             set { _Psw = value; } 33         } 34  35         private string _UserName; 36         /// 
 37         /// 用户别称 38         /// 
 39         [Field("ConsumerName", DbType.String, 50)] 40         public string U_UserName 41         { 42             get { return _UserName; } 43             set { _UserName = value; } 44         } 45  46         private string _City; 47         /// 
 48         /// 所住城市 49         /// 
 50         [Field("UserCity", DbType.String, 50)] 51         public string U_City 52         { 53             get { return _City; } 54             set { _City = value; } 55         } 56  57         private int _Popedom; 58         /// 
 59         /// 权限 60         /// 
 61         [Field("popedom", DbType.Int32, 0)] 62         public int U_Popedom 63         { 64             get { return _Popedom; } 65             set { _Popedom = value; } 66         } 67  68         private DateTime _AddDataTime; 69         /// 
 70         /// 注册时间 71         /// 
 72         [Field("addDataTime", DbType.Date, 0)] 73         public DateTime U_AddDataTime 74         { 75             get { return _AddDataTime; } 76             set { _AddDataTime = value; } 77         } 78  79         private int _Sex; 80         /// 
 81         /// 性别 82         /// 
 83         [Field("Sex", DbType.Int32, 0)] 84         public int U_Sex 85         { 86             get { return _Sex; } 87             set { _Sex = value; } 88         } 89  90         private int _BirthTime; 91         /// 
 92         /// 出身日期； 93         /// 
 94         [Field("BirthTime", DbType.String, 9)] 95         public int U_BirthTime 96         { 97             get { return _BirthTime; } 98             set { _BirthTime = value; } 99         }100     }101 }

4:测试控制台程序

UserInf userss = new UserInf();                userss.U_UserID = "aw12311";                userss.U_Psw = "123";                userss.U_UserName = "aw";                userss.U_City = "武汉";                userss.U_Popedom = 1;                userss.U_Sex = 1;                userss.U_BirthTime = 19900114;                userss.U_AddDataTime = DateTime.Now;                DateIsTableAttribute
     
       t = new DateIsTableAttribute
      
       ();                Response.Write(" 
       
" + t.insertDate(userss));