C# 实现登录出问题了，求大神解惑
本来之应该输出成功的，结果一下子输出4排。
其他的登录循环也有类似问题，下面贴代码。
1.login
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ConsoleYang.User;
using ConsoleYang.Conn;
using ConsoleYang.Handle;
using System.Collections;
namespace ConsoleYang.Handle
{
class Login
{
//普通用户登录
public void NormalUserLogin()
{
NormalUser normalUser = new NormalUser();
//用户输入；
string usernameInput=Console.ReadLine();
string passwordInput=Console.ReadLine();
//ARRAYLIST
ArrayList listQueryTwo;
string connString = "Server=WIN7U-20120915R;database=ConsoleYang;uid=sa;password=";
ConnDataBase conn = new ConnDataBase();
listQueryTwo=conn.connectQuery("select * from userinfo", connString);
try
{
foreach (string king in listQueryTwo)
{
//Console.WriteLine(king);
normalUser.Username = king;
normalUser.Password = king;
if (usernameInput.Equals(normalUser.Username) && passwordInput.Equals(normalUser.Password))
{
Console.WriteLine("success login normal user");
}
else
{
Console.WriteLine("fail to login normal user");
}
}
}
catch (Exception e)
{
Console.WriteLine(e.StackTrace);
}
}
//管理员登陆
public void AdminLogin()
{
Admin admin = new Admin();
AdminDelete adminDelete = new AdminDelete();
//接受的管理员名和密码
string adminName = admin.Name;
string adminPassword = admin.Password;
//输入的管理员名和密码;
string adminNameInput = Console.ReadLine();
string adminPasswordInput = Console.ReadLine();
ArrayList listQueryTwo;
string connString = "Server=WIN7U-20120915R;database=ConsoleYang;uid=sa;password=";
ConnDataBase conn = new ConnDataBase();
listQueryTwo = conn.connectAdmin("select * from admin", connString);
try
{
foreach (string adminUser in listQueryTwo)
{
admin.Name = adminUser;
admin.Password = adminUser;
//判断管理员名和密码。
if (adminNameInput.Equals(admin.Name) && adminPasswordInput.Equals(admin.Password))
{
Console.WriteLine("success login admin");
adminDelete.deleteNormalUser();
}
else
{
Console.WriteLine("fail to login admin");
}
}
}
catch (Exception e)
{
}
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ConsoleYang.User;
using ConsoleYang.Conn;
using ConsoleYang.Handle;
namespace ConsoleYang
{
class MainProgram
{
static void Main(string[] args)
{
//欢迎界面
Console.WriteLine("******************************************");
Console.WriteLine("*********************");
Console.WriteLine("************************");
Console.WriteLine("******Welcome******");
Console.WriteLine("************************");
Console.WriteLine("*********************************************");
//实例化各对象
Login login = new Login();
Register register = new Register();
//让用户选择注册或者登录。
Console.WriteLine("register or login?");
Console.WriteLine("0:register --- 1:login");
int registerOrLogin =Convert.ToInt32(Console.ReadLine());
try
{
if (registerOrLogin == 0)
{
//注册。
register.RegisterTwo();
Console.WriteLine("scuccessful to register!!!");
Console.WriteLine("login? input yes!!!");
string loginTwo=Console.ReadLine();
if (loginTwo.Equals("yes"))
{
login.NormalUserLogin();
}
}
else if (registerOrLogin == 1)
{
// 1.用户选择登录，0：管理员，1：普通用户
Console.WriteLine("0:admin login 1.normaluserlogin");
int choosedNumber = Convert.ToInt32(Console.ReadLine());
if (choosedNumber == 0)
{
login.AdminLogin();
}
else if (choosedNumber == 1)
{
login.NormalUserLogin();
}
else
{
Console.WriteLine("please enter the right number : 0 or 1");
}
}
}
catch(Exception e)
{
Console.WriteLine(e.StackTrace);
}
Console.ReadKey();
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using ConsoleYang.Conn;
using ConsoleYang.Handle;
using ConsoleYang.User;
using System.Collections;
namespace ConsoleYang.Conn
{
class ConnDataBase
{
//注册连接
public void connect(string queryStr,string connString)
{
/* SqlConnection sqlConn = new SqlConnection();
sqlConn.ConnectionString = "Server=localhost;Catalog=ConsoleYang;uid=administrator;password=";
sqlConn.Open();
*/
using (SqlConnection conn = new SqlConnection(connString))
{
// conn.Open();
SqlCommand command = new SqlCommand(queryStr,conn);
command.Connection.Open();
command.ExecuteNonQuery();
}
}
//登录普通用户
public ArrayList connectQuery(string queryStr, string connString)
{
/* SqlConnection sqlConn = new SqlConnection();
sqlConn.ConnectionString = "Server=localhost;Catalog=ConsoleYang;uid=administrator;password=";
sqlConn.Open();
*/
using (SqlConnection conn = new SqlConnection(connString))
{
// conn.Open();
SqlCommand command = new SqlCommand(queryStr, conn);
command.Connection.Open();
var connData=command.ExecuteReader();
// NormalUser normaluser = new NormalUser();
NormalUser normaluser = new NormalUser();
// string[,] nameAndPwd = new string[100, 2];
ArrayList listQuery = new ArrayList();
while (connData.Read())
{
normaluser.Username= connData.GetString(0);
normaluser.Password=connData.GetString(1);
listQuery.Add(normaluser.Username);
listQuery.Add(normaluser.Password);
}
return listQuery;
}
}
//连接管理员
public ArrayList connectAdmin(string queryStr, string connString)
{
/* SqlConnection sqlConn = new SqlConnection();
sqlConn.ConnectionString = "Server=localhost;Catalog=ConsoleYang;uid=administrator;password=";
sqlConn.Open();
*/
using (SqlConnection conn = new SqlConnection(connString))
{
// conn.Open();
SqlCommand command = new SqlCommand(queryStr, conn);
command.Connection.Open();
var connData = command.ExecuteReader();
// NormalUser normaluser = new NormalUser();
NormalUser normaluser = new NormalUser();
// string[,] nameAndPwd = new string[100, 2];
ArrayList listQuery = new ArrayList();
while (connData.Read())
{
normaluser.Username = connData.GetString(0);
normaluser.Password = connData.GetString(1);
listQuery.Add(normaluser.Username);
listQuery.Add(normaluser.Password);
}
return listQuery;
}
}
}
}
[解决办法]
select 的时候把普通用户或管理员用户的用户名密码写进条件里面
