三层结构发生错误 请大家来看看

[dz358283]

写一层都没有问题的

关键代码如下：
public users(string ad, int login_count)
: this(ad, login_count){}
public users(string ad, string reg_time, string last_time, int user_level, int login_count, int count_get, int today_get, int today_lottery)
{
_ad = ad;
_reg_time = reg_time;
_last_time = last_time;
_user_level = user_level;
_login_count = login_count;
_count_get = count_get;
_today_get = today_get;
_today_lottery = today_lottery;
}

提示我 users无法调用本身

逻辑：

using System;
using System.Data;
using System.Collections.Generic;
using Users.DataAccessLayer;

/// <summary>
/// users 的摘要说明
/// </summary>
/// 
namespace Users.LogicLayer
{
    public class users
    {
        private int _id = 0;
        private string _ad = string.Empty;
        private string _reg_time = string.Empty;
        private string _last_time = string.Empty;
        private int _user_level = 0;
        private int _login_count = 0;
        private int _count_get = 0;
        private int _today_get = 0;
        private int _today_lottery = 0;

        public int Id
        {
            get { return _id; }
        }
        public string Ad
        {
            get { return _ad; }
        }
        public string Reg_time
        {
            get { return _reg_time; }
            set { _reg_time = value; }
        }
        public string Last_time
        {
            get { return _last_time; }
            set { _last_time = value; }
        }
        public int User_level
        {
            get { return _user_level; }
            set { _user_level = value; }
        }
        public int Login_count
        {
            get { return _login_count; }
            set { _login_count = value; }
        }
        public int Count_get
        {
            get { return _count_get; }
            set { _login_count = value; }
        }
        public int Today_get
        {
            get { return _today_get; }
            set { _today_get = value; }
        }
        public int Today_lottery
        {
            get { return _today_get; }
            set { _today_lottery = value; }
        }

        public static int CountAD(string userid)
        {
            usersdb count = new usersdb();
            return count.GetUsersADcount(userid);
        }
        public static DataTable SelectAD(string userid)
        {
            usersdb dataAccessLayer = new usersdb();
            return dataAccessLayer.GetUsersInfoFromDB(userid);
        }
        public static void Update(string ad, int count_get)
        {
            users usersToUpdate = new users(ad, count_get);
            usersToUpdate.Save();
        }

        public static void Insert(string ad, string reg_time, string last_time, int user_level, int login_count, int count_get, int today_get, int today_lottery)
        {
            users newUsers=new users(ad,reg_time,last_time,user_level,login_count,count_get,today_get,today_lottery);
            newUsers.Save();
        }

        public void Save()
        {
            usersdb dataAccessLayer = new usersdb();
            if (_id > 0)
                dataAccessLayer.UpdateUsersInfo(this);
            else
                dataAccessLayer.InsertUsersInfo(this);
        }

        public users(string ad, int login_count)
            : this(ad, login_count){}
        public users(string ad, string reg_time, string last_time, int user_level, int login_count, int count_get, int today_get, int today_lottery)
        {
            _ad = ad;
            _reg_time = reg_time;
            _last_time = last_time;
            _user_level = user_level;
            _login_count = login_count;
            _count_get = count_get;
            _today_get = today_get;
            _today_lottery = today_lottery;
        }
    }
}

[aa11582283]

public users(string ad, int login_count)
: this(ad, login_count){}
这啥意思 自己继承自己？还有这种写法？而且你是在构造函数里这么写，很古怪、

[dz358283]

写一层都没有问题的

关键代码如下：
public users(string ad, int login_count)
: this(ad, login_count){}
public users(string ad, string reg_time, string last_time, int user_level, int login_count, int count_get, int today_get, int today_lottery)
{
_ad = ad;
_reg_time = reg_time;
_last_time = last_time;
_user_level = user_level;
_login_count = login_count;
_count_get = count_get;
_today_get = today_get;
_today_lottery = today_lottery;
}

提示我 users无法调用本身

逻辑：

using System;
using System.Data;
using System.Collections.Generic;
using Users.DataAccessLayer;

/// <summary>
/// users 的摘要说明
/// </summary>
/// 
namespace Users.LogicLayer
{
    public class users
    {
        private int _id = 0;
        private string _ad = string.Empty;
        private string _reg_time = string.Empty;
        private string _last_time = string.Empty;
        private int _user_level = 0;
        private int _login_count = 0;
        private int _count_get = 0;
        private int _today_get = 0;
        private int _today_lottery = 0;

        public int Id
        {
            get { return _id; }
        }
        public string Ad
        {
            get { return _ad; }
        }
        public string Reg_time
        {
            get { return _reg_time; }
            set { _reg_time = value; }
        }
        public string Last_time
        {
            get { return _last_time; }
            set { _last_time = value; }
        }
        public int User_level
        {
            get { return _user_level; }
            set { _user_level = value; }
        }
        public int Login_count
        {
            get { return _login_count; }
            set { _login_count = value; }
        }
        public int Count_get
        {
            get { return _count_get; }
            set { _login_count = value; }
        }
        public int Today_get
        {
            get { return _today_get; }
            set { _today_get = value; }
        }
        public int Today_lottery
        {
            get { return _today_get; }
            set { _today_lottery = value; }
        }

        public static int CountAD(string userid)
        {
            usersdb count = new usersdb();
            return count.GetUsersADcount(userid);
        }
        public static DataTable SelectAD(string userid)
        {
            usersdb dataAccessLayer = new usersdb();
            return dataAccessLayer.GetUsersInfoFromDB(userid);
        }
        public static void Update(string ad, int count_get)
        {
            users usersToUpdate = new users(ad, count_get);
            usersToUpdate.Save();
        }

        public static void Insert(string ad, string reg_time, string last_time, int user_level, int login_count, int count_get, int today_get, int today_lottery)
        {
            users newUsers=new users(ad,reg_time,last_time,user_level,login_count,count_get,today_get,today_lottery);
            newUsers.Save();
        }

        public void Save()
        {
            usersdb dataAccessLayer = new usersdb();
            if (_id > 0)
                dataAccessLayer.UpdateUsersInfo(this);
            else
                dataAccessLayer.InsertUsersInfo(this);
        }

        public users(string ad, int login_count)
            : this(ad, login_count){}
        public users(string ad, string reg_time, string last_time, int user_level, int login_count, int count_get, int today_get, int today_lottery)
        {
            _ad = ad;
            _reg_time = reg_time;
            _last_time = last_time;
            _user_level = user_level;
            _login_count = login_count;
            _count_get = count_get;
            _today_get = today_get;
            _today_lottery = today_lottery;
        }
    }
}

[boyle0630]

到现在都还弄不清白什么是三层结构,还要学习啊

[ReyZhang]

public users(string ad, int login_count)
: this(ad, login_count){}

你的构造器有问题
改成如下:

public users(string ad, int login_count)
{
this._ad=ad;
this._login_count=login_count;
//或不写代码
}

[dz358283]

我是 初学者 这个是 定义部分类的写法 看书 学着写的


看看哪位大哥 能帮忙纠错 在线等

[dz358283]

书上有个例子 给大家看看 这本书 不可能有错误的

...
public Product(string name, decimal price, string description)
:this(0, name, price, desription) {}

public Product(int id, string name, decimal price, string description)
{
_id = id;
_name = name;
_price = price;
_description = description;
}