[英]Login using different user in a different page?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using MSSQLConnector;
using System.Data;
namespace SoftwareAnalysisAndDesign.SAD
{
public partial class OnlineAppSyss : System.Web.UI.Page
{
private MSConnector connector = new MSConnector();
//string queries for each DataSet
string query = null;
string teacherquery = null;
string subjectquery = null;
string schoolfeequery = null;
string accountdetailsquery = null;
int rowcounter = 0;
int teachercounter = 0;
//DataSet and DataTable initialization
private DataSet studentData;
private DataSet subjectData;
private DataSet schoolfeeData;
private DataSet teacherData;
private DataSet accountdetailsData;
private DataTable subjectTable;
private DataTable schoolfeeTable;
private DataTable accountdetailsTable;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
if (dropdownrole.SelectedItem.Value == "Admin")
{
Admin();
}
else if (dropdownrole.SelectedItem.Value == "Student")
{
Student();
}
else if (dropdownrole.SelectedItem.Value == "Teacher")
{
Teacher();
}
}
public void Admin()
{
//String decleration
string adminusername = (this.UserName.Value);
string adminpass = (this.Password.Value);
try
{
if (adminusername == "admin" && adminpass == "cmpe1234")
{
Session["adminlogin"] = adminusername;
Response.Redirect("AdministratorPage.aspx");
}
}
catch
{
Response.Write("<script language=javascript>alert('Username and password does not match. Try again');</script>");
}
}
public void Student()
{
//Connection String
connector.ConnectionString = "Data Source=keith;Initial Catalog=SAD;Integrated Security=True";
//String decleration
string username = (this.UserName.Value);
string pass = (this.Password.Value);
//query database from sql server management studio for student
query = "select studentid,password,firstname,lastname,course,year from student";
//execute query for student
studentData = connector.ExecuteQuery(query);
try
{
for (; ; )
{
//string decleration and getting each rows of the Student database
string userid = studentData.Tables[0].Rows[rowcounter]["StudentID"].ToString();
string password = studentData.Tables[0].Rows[rowcounter]["Password"].ToString();
string firstname = studentData.Tables[0].Rows[rowcounter]["FirstName"].ToString();
string lastname = studentData.Tables[0].Rows[rowcounter]["LastName"].ToString();
string course = studentData.Tables[0].Rows[rowcounter]["Course"].ToString();
string year = studentData.Tables[0].Rows[rowcounter]["Year"].ToString();
//For Student Condition
if (username == userid && pass == password)
{
//For Student Data Sessions
Session["login"] = userid;
Session["firstname"] = firstname;
Session["lastname"] = lastname;
Session["course"] = course;
Session["year"] = year;
//For Account Details Data
accountdetailsquery = "select StudentID,FirstName,MiddleName,LastName,Age,Province,City,Course,Year,College,Department,ContactNumber,Email from student where studentid = " + username + "";
//query database from sql server management studio for student as accountDetails Information
accountdetailsData = connector.ExecuteQuery(accountdetailsquery);
accountdetailsTable = accountdetailsData.Tables[0];
Session["AccountDetails"] = accountdetailsTable;
//For SchoolFee Data
//query database from sql server management studio for schoolfee
schoolfeequery = "select DatePaid,AmountPaid,CurrentBalance,TotalBalance,Semester from schoolfee where studentid = " + username + "";
//execute query for schoolfee
schoolfeeData = connector.ExecuteQuery(schoolfeequery);
//get all data rows for SchoolFee and store it into DataTable
schoolfeeTable = schoolfeeData.Tables[0];
Session["SchoolFee"] = schoolfeeTable;
//For Subject Data
//query database from sql server management studio for subject
subjectquery = "select CourseNo,CourseDescription,Units,Day,StartTime,EndTime,Room from subject where studentid = " + username + "";
//execute query for subject
subjectData = connector.ExecuteQuery(subjectquery);
//get all data rows for Subject and store it into DataTable
subjectTable = subjectData.Tables[0];
Session["Subjects"] = subjectTable;
//Redirect the page to Student Page after the user successfully logs in.
Response.Redirect("StudentPage.aspx", true);
break;
}
else
{
rowcounter++;
}
}
}
catch
{
Response.Write("<script language=javascript>alert('Username and password does not match. Try again');</script>");
}
}
public void Teacher()
{
//Connection String
connector.ConnectionString = "Data Source=keith;Initial Catalog=SAD;Integrated Security=True";
//String decleration
string username = (this.UserName.Value);
string pass = (this.Password.Value);
//query database from sql server management studio for student
teacherquery = "select teacherid,password,firstname,lastname,department,position from teacher";
//execute query for student
teacherData = connector.ExecuteQuery(teacherquery);
try
{
for (; ; )
{
//string decleration and getting each rows of the Teacher database
string teacheruserid = teacherData.Tables[0].Rows[rowcounter]["TeacherID"].ToString();
string teacherpassword = teacherData.Tables[0].Rows[rowcounter]["Password"].ToString();
string teacherfirstname = teacherData.Tables[0].Rows[rowcounter]["FirstName"].ToString();
string teacherlastname = teacherData.Tables[0].Rows[rowcounter]["LastName"].ToString();
string teacherdepartment = teacherData.Tables[0].Rows[rowcounter]["Department"].ToString();
string teacherposition = teacherData.Tables[0].Rows[rowcounter]["Position"].ToString();
//For Teacher Condition
if (username == teacheruserid && pass == teacherpassword)
{
Session["teacherlogin"] = teacheruserid;
Session["teacherfirstname"] = teacherfirstname;
Session["teacherlastname"] = teacherlastname;
Session["department"] = teacherdepartment;
Session["position"] = teacherposition;
//Redirect the page to Student Page after the user successfully logs in.
Response.Redirect("TeacherPage.aspx", true);
break;
}
else
{
rowcounter++;
}
}
}
catch
{
Response.Write("<script language=javascript>alert('Username and password does not match. Try again (teacher)');</script>");
}
}
}
}
我的問題是我無法訪問此代碼中的教師頁面,它將僅訪問學生頁面。 我應該在系統中使用什么條件來避免冗余?
這是我的aspx下拉列表代碼:
<asp:DropDownList runat="server" id="dropdownrole">
<asp:ListItem Text="Admin">Admin</asp:ListItem>
<asp:ListItem Text="Student">Student</asp:ListItem>
<asp:ListItem Text="Teacher">Teacher</asp:ListItem>
</asp:DropDownList>
和登錄按鈕:
protected void Button1_Click(object sender, EventArgs e)
{
if (dropdownrole.SelectedItem.Value == "Admin")
{
Admin();
}
else if (dropdownrole.SelectedItem.Value == "Student")
{
Student();
}
else if (dropdownrole.SelectedItem.Value == "Teacher")
{
Teacher();
}
}
我希望有一個條件,如果用戶名和密碼輸入檢測到2個用戶中的任何一個,它將重定向到他們的特定網頁。 請幫忙。
您沒有在您選擇的老師密碼teacherquery
為此該teacherpassword
總是空,之所以條件password == teacherpassword
永遠是假的。
就像DPac指出的那樣,您無需查詢所有行就僅需驗證用戶名和密碼,只需僅選擇用戶名和密碼,如果正確,則選擇所需的所有行並將其分配給會話,然后重定向。
關於該問題,如果學生的用戶名與老師的用戶名相同,將會有很多麻煩,要避免該問題(不做很多事情)是在兩個名為userRole
表中再添加1個int
行(例如:1 = admin ,2 =老師,3 =學生等),並將其設置為空。 之后,進入每個表並將該行更新為適當的值(例如,在學生表中: UPDATE student SET userRole = 3
)。 更新所有行之后,請轉到“設計”,並將userRole設置為不允許為null現在,用戶名+ userRole組合(應該是您的主鍵)將使您的工作變得更加輕松。
盡管我更喜歡@ronaldinho為兩個表提供RoleId列的方法。這是您可以做的而又不會打擾數據庫。
只需在登錄頁面上添加一個包含“教師”和“學生”項目的下拉列表。因此,當有人嘗試登錄時,他們必須選擇自己的角色,然后輸入。 這樣,您可以將代碼定向為
protected void Button1_Click(object sender, EventArgs e)
{
if (dropdownrole.SelectedItem.Text == "Admin")
{
Admin();
}
else if (dropdownrole.SelectedItem.Text == "Student")
{
Student();
}
else if (dropdownrole.SelectedItem.Text == "Teacher")
{
Teacher();
}
}
看看有沒有可能
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