asp.net简单的注册或者登陆三层架构的例子

模型层
private int userId;
        public int UserId
        {
            get { return userId; }
            set { userId = value; }
        }
        private string userName;
        public string UserName
        {
            get { return userName; }
            set { userName = value; }
        }
        private string passWord;
        public string PassWord
        {
            get { return passWord; }
            set { passWord = value; }
        }
数据层
  public class UserService
    {
        public List<User>  GetAllUserDynamic(string whereCondition)
        {
            List<User> users=new List<User>();
            string strSQL = "spSelect";
            SqlParameter[] parameter = new SqlParameter[] 
            {
                new SqlParameter("@TableCondition","User"),
                new SqlParameter("@WhereCondition",whereCondition),
                new SqlParameter("@OrderCondition",null)
            };
            using (SqlDataReader dataReader=SqlHelper.GetDataReader(strSQL,parameter))
            {
                while (dataReader.Read())
                {
                    User user = new User();
                    user.UserId = (int)dataReader["UserId"];
                    user.UserName = dataReader["UserName"].ToString();
                    user.PassWord = dataReader["PassWord"].ToString();
                   // user.TypeId = (int)dataReader["TypeId"];
                    users.Add(user);
                }
            }
            return users;
        }
        public object AddUser(User user) 
        {
            string strSQL = "spInsert";
            string valueCondition = string.Format("'{0}','{1}',{2}",user.UserName,user.PassWord,user.TypeId);
            SqlParameter[] parameter = new SqlParameter[] 
            {
                new SqlParameter("@TableCondition","User"),
                new SqlParameter("@ValueCondition",valueCondition)
            };
            return SqlHelper.ExecuteSalar(strSQL, parameter);
        }
        public int UpdateUser(User user)
        {
            string strSQL = "spUpdate";
            string setCondition = string.Format("[UserName]='{0}',[PassWord]='{1}',[TypeId]={2}", user.UserName, user.PassWord, user.TypeId);
            string whereCondition = string.Format("[UserId]={0}",user.UserId);
            SqlParameter[] parameter = new SqlParameter[] 
            {
                new SqlParameter("@TableCondition","User"),
                new SqlParameter("@SetCondition",setCondition),
                new SqlParameter("@WhereCondition",whereCondition)
            };
            return SqlHelper.ExecuteCommand(strSQL, parameter);
        }
        public int DeleteUser(User user)
        {
            string strSQL = "spDelete";
            string whereCondition = string.Format("[UserId]={0}", user.UserId);
            SqlParameter[] parameter = new SqlParameter[] 
            {
                new SqlParameter("@TableCondition","User"),
                new SqlParameter("@WhereCondition",whereCondition)
            };
            return SqlHelper.ExecuteCommand(strSQL, parameter);
        }
    }
业务层
 public class UserManager
    {
        UserService userService=new UserService();
        [DataObjectMethod(DataObjectMethodType.Select)]
        public List<User> GetAllUser() 
        {
            return userService.GetAllUserDynamic(null);
        }
        [DataObjectMethod(DataObjectMethodType.Select)]
        public User GetAllUserByUserId(int userId) 
        {
            string whereCondition = string.Format("[UserId]={0}",userId);
           List<User>  users = userService.GetAllUserDynamic(whereCondition);
           return users.Count > 0 ? users[0] : null;
        }
        [DataObjectMethod(DataObjectMethodType.Insert)]
        public object AddUser(User user) 
        {
            return userService.AddUser(user);
        }
        [DataObjectMethod(DataObjectMethodType.Update)]
        public int UpdateUser(User user)
        {
            return userService.UpdateUser(user);
        }
        [DataObjectMethod(DataObjectMethodType.Delete)]
        public int DeleteUser(User user)
        {
            return userService.DeleteUser(user);
        }
        [DataObjectMethod(DataObjectMethodType.Select)]
        public User LoginUser(object userName,object passWord) 
        {
            string whereCondition = string.Format("[UserName]='{0}'AND [PassWord]='{1}'",userName,passWord);
            List<User> users = userService.GetAllUserDynamic(whereCondition);
            return users.Count > 0 ? users[0] : null;
        }
    }
表示层 随便拖个拖个gridview 绑定下数据源
我用的通用存储过程 
CREATE PROCEDURE dbo.spSelect
 (
  @TableCondition nvarchar(255),
  @WhereCondition nvarchar(255)=null,
  @OrderCondition nvarchar(255)=null
 )
AS
 DECLARE @SQL NVARCHAR(255)
 SET @SQL='SELECT * FROM['+@TableCondition+']'
 IF @WhereCondition IS NOT NULL AND LEN (@WhereCondition)>0
 BEGIN 
 SET @SQL=@SQL+'WHERE'+@WhereCondition
 END
 IF @OrderCondition IS NOT NULL AND LEN (@OrderCondition)>0
 BEGIN 
 SET @SQL=@SQL+'ORDER BY'+@OrderCondition
 END
 EXEC sp_executesql @SQL
 RETURN
GO
CREATE PROCEDURE dbo.spInsert
 (
  @TableCondition nvarchar(255),
  @ValueCondition nvarchar(255)=null
 )
AS
 DECLARE @SQL NVARCHAR(255)
 SET @SQL='INSERT INTO['+@TableCondition+']'
 IF @ValueCondition IS NOT NULL AND LEN (@ValueCondition)>0
 BEGIN 
 SET @SQL=@SQL+'VALUES('+@ValueCondition+')'
 END
 SET @SQL=@SQL+'SELECT SCOPE_IDENTITY()'
 EXEC sp_executesql @sql
 RETURN
GO
CREATE PROCEDURE dbo.spUpdate
 (
  @TableCondition nvarchar(255),
  @SetCondition nvarchar(255)=null,
  @WhereCondition nvarchar(255)=null
 )
AS
 DECLARE @SQL NVARCHAR(255)
 SET @SQL='UPDATE ['+@TableCondition+']'
 IF @SetCondition IS NOT NULL AND LEN (@SetCondition)>0
 BEGIN 
 SET @SQL=@SQL+'SET'+@SetCondition
 END
 IF @WhereCondition IS NOT NULL AND LEN (@WhereCondition)>0
 BEGIN 
 SET @SQL=@SQL+'WHERE'+@WhereCondition
 END
 EXEC sp_executesql @sql
 RETURN
GO
CREATE PROCEDURE dbo.spDelete
 (
  @TableCondition nvarchar(255),
  @WhereCondition nvarchar(255)=null
 )
AS
 DECLARE @SQL NVARCHAR(255)
 SET @SQL='DELETE FROM ['+@TableCondition+']'
 IF @WhereCondition IS NOT NULL AND LEN (@WhereCondition)>0
 BEGIN 
 SET @SQL=@SQL+'WHERE'+@WhereCondition
 END
 EXEC sp_executesql @sql
 RETURN