我正在尝试将我的asp.net webforms(在C#中)应用程序构建为n层应用程序.我使用XSD强类型数据集创建了一个数据访问层,该数据集与sql服务器后端连接.我通过我以1：1为基础创建的一些业务层对象访问DAL到数据集中的数据表(例如,数据集中用户数据表的UsersBLL类).我正在BLL中进行检查,以确保传递给DAL的数据遵循应用程序的业务规则.这一切都很好.我遇到困难的地方是将BLL连接到表示层的点.例如,我的UsersBLL类主要处理整个数据表,因为它与DAL连接.我现在应该创建一个单独的“用户”(Singular)类来映射单个用户的属性,而不是多个用户吗？这样我就不必在表示层中搜索数据表了,因为我可以使用在User类中创建的属性.或者以某种方式尝试在UsersBLL中处理这个更好？

很抱歉,如果这听起来有点复杂……以下是UsersBLL的代码：

using System;
using System.Data;
using PedChallenge.DAL.PedDataSetTableAdapters;

[System.ComponentModel.DataObject]
public class UsersBLL
{
    private UsersTableAdapter _UsersAdapter = null;
    protected UsersTableAdapter Adapter
    {
        get
        {
            if (_UsersAdapter == null)
                _UsersAdapter = new UsersTableAdapter();

            return _UsersAdapter;
        }
    }


    [System.ComponentModel.DataObjectMethodAttribute
        (System.ComponentModel.DataObjectMethodType.Select,true)]
    public PedChallenge.DAL.PedDataSet.UsersDataTable GetUsers()
    {
        return Adapter.GetUsers();
    }

    [System.ComponentModel.DataObjectMethodAttribute
        (System.ComponentModel.DataObjectMethodType.Select,false)]
    public PedChallenge.DAL.PedDataSet.UsersDataTable GetUserByUserID(int userID)
    {
        return Adapter.GetUserByUserID(userID);
    }

    [System.ComponentModel.DataObjectMethodAttribute
        (System.ComponentModel.DataObjectMethodType.Select,false)]
    public PedChallenge.DAL.PedDataSet.UsersDataTable GetUsersByTeamID(int teamID)
    {
        return Adapter.GetUsersByTeamID(teamID);
    }


    [System.ComponentModel.DataObjectMethodAttribute
        (System.ComponentModel.DataObjectMethodType.Select,false)]
    public PedChallenge.DAL.PedDataSet.UsersDataTable GetUsersByEmail(string Email)
    {
        return Adapter.GetUserByEmail(Email);
    }


    [System.ComponentModel.DataObjectMethodAttribute
        (System.ComponentModel.DataObjectMethodType.Insert,true)]
    public bool AddUser(int? teamID,string FirstName,string LastName,string Email,string Role,int LocationID)
    {
        // Create a new UsersRow instance
        PedChallenge.DAL.PedDataSet.UsersDataTable Users = new PedChallenge.DAL.PedDataSet.UsersDataTable();
        PedChallenge.DAL.PedDataSet.UsersRow user = Users.NewUsersRow();

        if (UserExists(Users,Email) == true)
            return false;


        if (teamID == null) user.SetTeamIDNull();
        else user.TeamID = teamID.Value;
        user.FirstName = FirstName;
        user.LastName = LastName;
        user.Email = Email;
        user.Role = Role;
        user.LocationID = LocationID;

        // Add the new user
        Users.AddUsersRow(user);
        int rowsAffected = Adapter.Update(Users);

        // Return true if precisely one row was inserted,// otherwise false
        return rowsAffected == 1;
    }

    [System.ComponentModel.DataObjectMethodAttribute
        (System.ComponentModel.DataObjectMethodType.Update,true)]
    public bool UpdateUser(int userID,int? teamID,int LocationID)
    {
        PedChallenge.DAL.PedDataSet.UsersDataTable Users = Adapter.GetUserByUserID(userID);
        if (Users.Count == 0)
            // no matching record found,return false
            return false;

        PedChallenge.DAL.PedDataSet.UsersRow user = Users[0];

        if (teamID == null) user.SetTeamIDNull();
        else user.TeamID = teamID.Value;
        user.FirstName = FirstName;
        user.LastName = LastName;
        user.Email = Email;
        user.Role = Role;
        user.LocationID = LocationID;

        // Update the product record
        int rowsAffected = Adapter.Update(user);

        // Return true if precisely one row was updated,// otherwise false
        return rowsAffected == 1;
    }

    [System.ComponentModel.DataObjectMethodAttribute
        (System.ComponentModel.DataObjectMethodType.Delete,true)]
    public bool DeleteUser(int userID)
    {
        int rowsAffected = Adapter.Delete(userID);

        // Return true if precisely one row was deleted,// otherwise false
        return rowsAffected == 1;
    }

    private bool UserExists(PedChallenge.DAL.PedDataSet.UsersDataTable users,string email)
    {
        // Check if user email already exists
        foreach (PedChallenge.DAL.PedDataSet.UsersRow userRow in users)
        {
            if (userRow.Email == email)
                return true;
        }
        return false;
    }
}

一些指导正确的方向将非常感谢!!

谢谢大家！

马克斯