C#利用反射+特性实现简单的实体映射数据库操作类

附上源代码：

 using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace 反射_特性
 {
     [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
     public class FieldAttribute : Attribute
     {
         private string _Fields;
         /// <summary>
         /// 字段名称 keleyi.com
         /// </summary>
         public string Fields
         {
             get { return _Fields; }

         }

         private DbType _Dbtype;
         /// <summary>
         /// 字段类型
         /// </summary>
         public DbType Dbtype
         {
             get { return _Dbtype; }

         }

         private int _ValueLength;
         /// <summary>
         /// 字段值长度
         /// </summary>
         public int ValueLength
         {
             get { return _ValueLength; }

         }
         /// <summary>
         /// 构造函数
         /// </summary>
         /// <param name="fields"> 字段名</param>
         /// <param name="types"> 字段类型</param>
         /// <param name="i"> 字段值长度</param>
         public FieldAttribute(string fields, DbType types, int i)
         {

             _Fields = fields;
             _Dbtype = types;
             _ValueLength = i;
         }
     }
 }

2:表名特性

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace 反射_特性
 {
     [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = false)]
     public class TableAttribute : Attribute
     {
         private string _TableName;
         /// <summary>
         /// 映射的表名
         /// </summary>
         public string TableName
         {
             get { return _TableName; }
         }
         /// <summary>
         /// 定位函数映射表名；
         /// </summary>
         /// <param name="table"></param>
         public TableAttribute(string table)
         {
             _TableName = table;
         }
     }
 }

3:特性测试类

 using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace 特性_反射
 {
     [Table("Consumers")]
     public class UserInf
     {
         private string _UserID;
         /// <summary>
         /// 登陆ID
         /// </summary>
         [Field("ConsumerID", DbType.String, )]
         public string U_UserID
         {
             get { return _UserID; }
             set { _UserID = value; }
         }

         private string _Psw;
         /// <summary>
         /// 登陆密码
         /// </summary>
         [Field("ConsumerPwd", DbType.String, )]
         public string U_Psw
         {
             get { return _Psw; }
             set { _Psw = value; }
         }

         private string _UserName;
         /// <summary>
         /// 用户别称
         /// </summary>
         [Field("ConsumerName", DbType.String, )]
         public string U_UserName
         {
             get { return _UserName; }
             set { _UserName = value; }
         }

         private string _City;
         /// <summary>
         /// 所住城市
         /// </summary>
         [Field("UserCity", DbType.String, )]
         public string U_City
         {
             get { return _City; }
             set { _City = value; }
         }

         private int _Popedom;
         /// <summary>
         /// 权限
         /// </summary>
         [Field("popedom", DbType.Int32, )]
         public int U_Popedom
         {
             get { return _Popedom; }
             set { _Popedom = value; }
         }

         private DateTime _AddDataTime;
         /// <summary>
         /// 注册时间
         /// </summary>
         [Field("addDataTime", DbType.Date, )]
         public DateTime U_AddDataTime
         {
             get { return _AddDataTime; }
             set { _AddDataTime = value; }
         }

         private int _Sex;
         /// <summary>
         /// 性别
         /// </summary>
         [Field("Sex", DbType.Int32, )]
         public int U_Sex
         {
             get { return _Sex; }
             set { _Sex = value; }
         }

         private int _BirthTime;
         /// <summary>
         /// 出身日期；
         /// </summary>
         [Field("BirthTime", DbType.String, )]
         public int U_BirthTime
         {
             get { return _BirthTime; }
             set { _BirthTime = value; }
         }
     }
 }

4:测试控制台程序

                UserInf userss = new UserInf();
                userss.U_UserID = "aw12311";
                userss.U_Psw = "";
                userss.U_UserName = "aw";
                userss.U_City = "武汉";
                userss.U_Popedom = ;
                userss.U_Sex = ;
                userss.U_BirthTime = ;
                userss.U_AddDataTime = DateTime.Now;

                DateIsTableAttribute<UserInf> t = new DateIsTableAttribute<UserInf>();

                Response.Write(" </br>" + t.insertDate(userss));

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