/****** 对象:    Table [dbo].[UserInfo]        脚本日期: 03/08/2010 12:20:11 ******/ 
SET ANSI_NULLS  ON 
GO 
SET QUOTED_IDENTIFIER  ON 
GO 
IF  NOT  EXISTS ( SELECT *  FROM sys.objects  WHERE  object_id =  OBJECT_ID(N '[dbo].[UserInfo]')  AND type  in(N 'U')) 
BEGIN 
CREATE  TABLE [dbo].[UserInfo]( 
  [UserID] [ int] IDENTITY(1,1)  NOT  NULL, 
  [UserName] [ varchar](20)  COLLATE Chinese_PRC_CI_AS  NOT  NULL, 
  [RealName] [ nvarchar](8)  COLLATE Chinese_PRC_CI_AS  NOT  NULL, 
  [Age] [ tinyint]  NOT  NULL, 
  [Sex] [ bit]  NOT  NULL, 
  [Mobile] [ char](11)  COLLATE Chinese_PRC_CI_AS  NULL, 
  [Phone] [ char](11)  COLLATE Chinese_PRC_CI_AS  NULL, 
  [Email] [ varchar](50)  COLLATE Chinese_PRC_CI_AS  NOT  NULL, 
CONSTRAINT [PK_UserInfo]  PRIMARY  KEY  CLUSTERED    
( 
  [UserID]  ASC 
) WITH (IGNORE_DUP_KEY =  OFF) 
) 
END 
GO 
IF  NOT  EXISTS ( SELECT *  FROM sys.indexes  WHERE  object_id =  OBJECT_ID(N '[dbo].[UserInfo]')  AND  name= N 'IX_UserName') 
CREATE  UNIQUE  NONCLUSTERED  INDEX [IX_UserName]  ON [dbo].[UserInfo]    
( 
  [UserName]  ASC 
) WITH (IGNORE_DUP_KEY =  ON) 
GO

< connectionStrings > 
   < add  name ="Conn"  connectionString ="Data Source=zhou;Initial Catalog=AspNetStudy;User ID=sa;Password=jerry"  /> 
</ connectionStrings >

using System; 
using System.Collections.Generic; 
using System.Text; 
 
namespace ADODoNETDemo 
{ 
         public  class UserInfo 
        { 
                 /// <summary> 
                 /// 用户编号 
                 /// </summary> 
                 public  int UserId { get; set; } 
                 /// <summary> 
                 /// 用户名 
                 /// </summary> 
                 public  string UserName { get; set; } 
                 /// <summary> 
                 /// 真实姓名 
                 /// </summary> 
                 public  string RealName { get; set; } 
                 /// <summary> 
                 /// 年龄 
                 /// </summary> 
                 public  byte Age { get; set; } 
                 /// <summary> 
                 /// 性别 
                 /// </summary> 
                 public  bool Sex { get; set; } 
                 /// <summary> 
                 /// 电子邮件 
                 /// </summary> 
                 public  string Email { get; set; } 
                 /// <summary> 
                 /// 手机号 
                 /// </summary> 
                 public  string Mobile { get; set; } 
                 /// <summary> 
                 /// 电话 
                 /// </summary> 
                 public  string Phone { get; set; } 
        } 
}

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Data.SqlClient; 
using System.Data; 
 
namespace ADODoNETDemo 
{ 
         /// <summary> 
         /// 用ADO.NET实现CRUD功能 
         /// </summary> 
         public  class ADODotNetCRUD 
        { 
                 /// <summary> 
                 /// 统计用户总数 
                 /// </summary> 
                 /// <returns></returns> 
                 public  int Count() 
                { 
                         string sql =  "select count(1) from UserInfo"; 
                        SqlDbHelper db =  new SqlDbHelper(); 
                         return  int.Parse(db.ExecuteScalar(sql).ToString()); 
                } 
                 /// <summary> 
                 /// 创建用户 
                 /// </summary> 
                 /// <param name="info">用户实体</param> 
                 /// <returns></returns> 
                 public  bool Create(UserInfo info) 
                { 
                         string sql =  "insert UserInfo(UserName,RealName,Age,Sex,Mobile,Email,Phone)values(@UserName,@RealName,@Age,@Sex,@Mobile,@Email,@Phone)"; 
                        SqlParameter[] paramters =  new SqlParameter[]{ 
                                 new SqlParameter( "@UserName",info.UserName), 
                                 new SqlParameter( "@RealName",info.RealName), 
                                 new SqlParameter( "@Age",info.Age), 
                                 new SqlParameter( "@Sex",info.Sex), 
                                 new SqlParameter( "@Mobile",info.Mobile), 
                                 new SqlParameter( "@Email",info.Email), 
                                 new SqlParameter( "@Phone",info.Phone), 
                        }; 
                        SqlDbHelper db =  new SqlDbHelper(); 
                         return db.ExecuteNonQuery(sql, CommandType.Text, paramters) > 0; 
                } 
                 /// <summary> 
                 /// 读取用户信息 
                 /// </summary> 
                 /// <param name="userId">用户编号</param> 
                 /// <returns></returns> 
                 public UserInfo Read( int userId) 
                { 
                         string sql =  "select * from UserInfo Where UserId="+userId; 
                        SqlDbHelper db =  new SqlDbHelper(); 
                        DataTable data = db.ExecuteDataTable(sql); 
                         if (data.Rows.Count > 0) 
                        { 
                                DataRow row = data.Rows[0]; 
                                UserInfo info =  new UserInfo() 
                                { 
                                        UserId= int.Parse(row[ "UserId"].ToString()), 
                                        UserName=row[ "UserName"].ToString(), 
                                        Age= byte.Parse(row[ "Age"].ToString()), 
                                        Email=row[ "Email"].ToString(), 
                                        Mobile=row[ "Mobile"].ToString(), 
                                        Phone=row[ "Phone"].ToString(), 
                                        RealName=row[ "RealName"].ToString(), 
                                        Sex= bool.Parse(row[ "Sex"].ToString()) 
                                }; 
                                 return info; 
                        } 
                         else 
                        { 
                                 return  null; 
                        } 
                } 
                 /// <summary> 
                 /// 更新用户信息 
                 /// </summary> 
                 /// <param name="info">用户实体</param> 
                 /// <returns></returns> 
                 public  bool Update(UserInfo info) 
                { 
                         string sql =  "update UserInfo set UserName=@UserName,RealName=@RealName,Age=@Age,Sex=@Sex,Mobile=@Mobile,Email=@Email,Phone=@Phone where UserID=@UserID"; 
                        SqlParameter[] paramters =  new SqlParameter[]{ 
                                 new SqlParameter( "@UserName",info.UserName), 
                                 new SqlParameter( "@RealName",info.RealName), 
                                 new SqlParameter( "@Age",info.Age), 
                                 new SqlParameter( "@Sex",info.Sex), 
                                 new SqlParameter( "@Mobile",info.Mobile), 
                                 new SqlParameter( "@Email",info.Email), 
                                 new SqlParameter( "@Phone",info.Phone), 
                                 new SqlParameter( "@UserID",info.UserId), 
                        }; 
                        SqlDbHelper db =  new SqlDbHelper(); 
                         return db.ExecuteNonQuery(sql, CommandType.Text, paramters) > 0; 
                } 
                 /// <summary> 
                 /// 删除用户 
                 /// </summary> 
                 /// <param name="userId">用户编号</param> 
                 /// <returns></returns> 
                 public  bool Delete( int userId) 
                { 
                         string sql =  "delete from UserInfo where UserId=" + userId; 
                        SqlDbHelper db =  new SqlDbHelper(); 
                         return db.ExecuteNonQuery(sql) > 0; 
                } 
                 /// <summary> 
                 /// 获取用户表中编号最大的用户 
                 /// </summary> 
                 /// <returns></returns> 
                 public  int GetMaxUserId() 
                { 
                         string sql =  "select max(userId) from UserInfo"; 
                        SqlDbHelper db =  new SqlDbHelper(); 
                         return  int.Parse(db.ExecuteScalar(sql).ToString()); 
                } 
        } 
}