我不小心删除了一些控件，而 Visual Studio 给了我一个错误警告，我忽略了它，现在我失去了整个设计。
form.designer.cs，代码（.cs）仍然存在。只有表单设计是空的，没有所有控件:( 我可以撤消这个错误吗？
我不想告诉你这一点，但 form.designer.cs 是用于生成控件及其属性/设置并将它们放置在表单上的代码。当您将控件拖放到窗体上时，VS 会自动为您生成支持代码。您收到的警告可能是“您将无法撤消此操作”之类的内容，我会尝试
Ctrl + Z除此之外，你就很不走运了。
命名空间教育催化剂 { 内部课程计划 { 抽象类用户 { 公共字符串电子邮件； 公共字符串密码； 抽象公共无效setData（字符串电子邮件，字符串密码）；
}
class Admin : User
{
public override void setData(string email, string password)
{
this.Email = email;
this.password = password;
}
}
class Employee : User
{
public override void setData(string email, string password)
{
this.Email = email;
this.password = password;
}
}
class Student : User
{
public override void setData(string email, string password)
{
this.Email = email;
this.password = password;
}
}
class catalog
{
public string catalogName;
public string catalogDescription;
public string MadicenConponents;
public int id;
public catalog(string catalogName, string catalogDescription, string MadicenConponents, int id)
{
this.catalogName = catalogName;
this.catalogDescription = catalogDescription;
this.MadicenConponents = MadicenConponents;
this.id = id;
}
}
class Course
{
public int id;
public string name;
public string description;
public int duration;
public Course(string name, string description, int duration, int id)
{
this.id = id;
this.name = name;
this.description = description;
this.duration = duration;
}
}
static void Main(string[] args)
{
//Admin data
List<Admin> AdminList = new List<Admin>();
Admin admin1 = new Admin();
admin1.setData("[email protected]", "12345");
Admin admin2 = new Admin();
admin2.setData("[email protected]", "54321");
AdminList.Add(admin1);
AdminList.Add(admin2);
//Employee data
List<Employee> EmployeeList = new List<Employee>();
Employee employee1 = new Employee();
employee1.setData("[email protected]", "7777");
Employee employee2 = new Employee();
employee2.setData("[email protected]", "5555");
EmployeeList.Add(employee1);
EmployeeList.Add(employee2);
//student
List<Student> StudentList = new List<Student>();
Student student1 = new Student();
student1.setData("[email protected]", "3333");
Student student2 = new Student();
student2.setData("[email protected]", "4444");
StudentList.Add(student1);
StudentList.Add(student2);
//catloge
List<catalog> catlogeList = new List<catalog>();
//course
List<Course> courseList = new List<Course>();
while (true)
{
// main menu
Console.WriteLine("Welcome to educatalyst ");
Console.WriteLine("1- sign up");
Console.WriteLine("2- Login");
int P = int.Parse(Console.ReadLine());
//sign up
if (P == 1)
{
Console.WriteLine("1- sign up as admin");
Console.WriteLine("2- sign up as Employee ");
Console.WriteLine("3- sign up as student");
int mm = int.Parse(Console.ReadLine());
Console.WriteLine("please Enter Email");
string Email = Console.ReadLine();
Console.WriteLine("please Enter Password");
string Password = Console.ReadLine();
string Emailpattern = @"^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$";
string passwordpattern = @".{4,}";
if (Regex.IsMatch(Email, Emailpattern) && Regex.IsMatch(Password, passwordpattern))
{
//as admin
if (mm == 1)
{
Admin admin3 = new Admin();
admin3.setData(Email, Password);
AdminList.Add(admin3);
Console.WriteLine("you add admin successfuly");
}
// as employee
else if (mm == 2)
{
Employee emp3 = new Employee();
emp3.setData(Email, Password);
EmployeeList.Add(emp3);
Console.WriteLine("you add employee successfuly");
}
// as student
else if (mm == 3)
{
Student student3 = new Student();
student3.setData(Email, Password);
StudentList.Add(student3);
Console.WriteLine("you add student successfuly");
}
}
else
{
Console.WriteLine("wrong data");
continue;
}
}
//LOG IN
else if (P == 2)
{
Console.WriteLine("1- login as Admin");
Console.WriteLine("2- Login as Employee");
Console.WriteLine("3- login as student");
int x = int.Parse(Console.ReadLine());
//admin
if (x == 1)
{
// check Admin login
Console.WriteLine("please Enter Email");
string Email = Console.ReadLine();
Console.WriteLine("please Enter Password");
string password = Console.ReadLine();
int login = 0;
foreach (var admin in AdminList)
{
if (admin.Email == Email && admin.password == password)
{
login = 1;
}
}
if (login == 1)
{ //admin menu
Console.WriteLine("1- Add cataloge");
Console.WriteLine("2- view cataloge");
Console.WriteLine("3- Search cataloge");
Console.WriteLine("4- delete cataloge");
Console.WriteLine("5- Add Course");
Console.WriteLine("6- Delete Course");
Console.WriteLine("7- Search Course");
Console.WriteLine("8- View Course");
Console.WriteLine("9- View information");
int l = int.Parse(Console.ReadLine());
switch (l)
{
case 1:
Console.WriteLine("add cataloge id");
int id = int.Parse(Console.ReadLine());
Console.WriteLine("add catolge name");
string name = Console.ReadLine();
Console.WriteLine("add catolge description");
string description = Console.ReadLine();
Console.WriteLine("add medcinie component");
string component = Console.ReadLine();
catalog catlogedata = new catalog(name, description, component, id);
catlogeList.Add(catlogedata);
Console.WriteLine("you add cataloge successfully");
break;
case 2:
foreach (var cat in catlogeList)
{
Console.WriteLine("cataloge ID is " + cat.id);
Console.WriteLine("cataloge name is " + cat.catalogName);
Console.WriteLine("cataloge Description is " + cat.catalogDescription);
Console.WriteLine("cataloge component is " + cat.MadicenConponents);
}
break;
case 3:
Console.WriteLine("enter ID to search ");
int searchId = int.Parse(Console.ReadLine());
int searchResult = 0;
foreach (var search in catlogeList)
{
if (searchId == search.id)
{
Console.WriteLine("we found cataloge");
Console.WriteLine("catloge id is " + search.id);
Console.WriteLine("catloge name is " + search.catalogName);
Console.WriteLine("catloge Description is " + search.catalogDescription);
Console.WriteLine("catloge Component is " + search.MadicenConponents);
searchResult = 1;
}
}
if (searchResult == 0)
{
Console.WriteLine("we cannot find this catloge");
}
break;
case 4:
Console.WriteLine("Enter id to delete");
int DeletedID = int.Parse(Console.ReadLine());
int deleteResult = 0;
int deleteResult1 = 0;
foreach (var Delete in catlogeList)
{
if (DeletedID == Delete.id)
{
Console.WriteLine("you deleted successfully");
deleteResult1 = 1;
break;
}
deleteResult++;
}
if (deleteResult1 == 0)
{
Console.WriteLine("we cannot find this id");
}
else
{
catlogeList.RemoveAt(deleteResult);
}
break;
case 5:
Console.WriteLine("add course id");
int id1 = int.Parse(Console.ReadLine());
Console.WriteLine("add course name");
string name1 = Console.ReadLine();
Console.WriteLine("add coursee description");
string description1 = Console.ReadLine();
Console.WriteLine("add course duration");
int duration = int.Parse(Console.ReadLine());
Course coursedata = new Course(name1, description1, duration, id1);
courseList.Add(coursedata);
Console.WriteLine("you add course successfully");
break;
case 6:
Console.WriteLine("Enter id to delete");
int DeletedID1 = int.Parse(Console.ReadLine());
int deleteResult11 = 0;
int deleteResult111 = 0;
foreach (var Delete in courseList)
{
if (DeletedID1 == Delete.id)
{
Console.WriteLine("you deleted successfully");
deleteResult111 = 1;
break;
}
deleteResult11++;
}
if (deleteResult111 == 0)
{
Console.WriteLine("we cannot find this id");
}
else
{
courseList.RemoveAt(deleteResult11);
}
break;
case 7:
Console.WriteLine("enter ID to search ");
int searchId1 = int.Parse(Console.ReadLine());
int searchResult1 = 0;
foreach (var search in courseList)
{
if (searchId1 == search.id)
{
Console.WriteLine("we found course");
Console.WriteLine("course id is " + search.id);
Console.WriteLine("course name is " + search.name);
Console.WriteLine("course Description is " + search.description);
Console.WriteLine("ccourse Component is " + search.duration);
searchResult = 1;
}
}
if (searchResult1 == 0)
{
Console.WriteLine("we cannot find this course");
}
break;
case 8:
foreach (var co in courseList)
{
Console.WriteLine("we found course");
Console.WriteLine("course id is " + co.id);
Console.WriteLine("course name is " + co.name);
Console.WriteLine("course Description is " + co.description);
Console.WriteLine("course duration is " + co.duration);
}
break;
}
}
else
{
Console.WriteLine("wrong data");
continue;
}
}
else if (x == 2)
{
// check Employee login
Console.WriteLine("please Enter Email");
string Email = Console.ReadLine();
Console.WriteLine("please Enter Password");
string password = Console.ReadLine();
int login = 0;
foreach (var employee in EmployeeList)
{
if (employee.Email == Email && employee.password == password)
{
login = 1;
}
}
if (login == 1)
{
Console.WriteLine("1- Search cataloge");
Console.WriteLine("2- View cataloge");
Console.WriteLine("3- send feedback");
int k = int.Parse(Console.ReadLine());
switch (k)
{
case 1:
Console.WriteLine("enter ID to search ");
int searchId = int.Parse(Console.ReadLine());
int searchResult = 0;
foreach (var search in catlogeList)
{
if (searchId == search.id)
{
Console.WriteLine("we found cataloge");
Console.WriteLine("catloge id is " + search.id);
Console.WriteLine("catloge name is " + search.catalogName);
Console.WriteLine("catloge Description is " + search.catalogDescription);
Console.WriteLine("catloge Component is " + search.MadicenConponents);
searchResult = 1;
}
}
if (searchResult == 0)
{
Console.WriteLine("we cannot find this catloge");
}
break;
case 2:
foreach (var cat in catlogeList)
{
Console.WriteLine("cataloge ID is " + cat.id);
Console.WriteLine("cataloge name is " + cat.catalogName);
Console.WriteLine("cataloge Description is " + cat.catalogDescription);
Console.WriteLine("cataloge component is " + cat.MadicenConponents);
}
break;
case 3:
Console.WriteLine("write your feedback");
string feedback = Console.ReadLine();
Console.WriteLine("thank you ");
break;
}
}
else
{
Console.WriteLine("wrong data");
continue;
}
}
else if (x == 3)
{
Console.WriteLine("please Enter Email");
string Email = Console.ReadLine();
Console.WriteLine("please Enter Password");
string password = Console.ReadLine();
int login = 0;
foreach (var student in StudentList)
{
if (student.Email == Email && student.password == password)
{
login = 1;
}
}
if (login == 1)
{
//student manue
Console.WriteLine("1- Search course");
Console.WriteLine("2- View course");
Console.WriteLine("3- send feedback");
int k = int.Parse(Console.ReadLine());
switch (k)
{
case 1:
Console.WriteLine("enter ID to search ");
int searchId = int.Parse(Console.ReadLine());
int searchResult = 0;
foreach (var search in courseList)
{
if (searchId == search.id)
{
Console.WriteLine("we found course");
Console.WriteLine("ccourse id is " + search.id);
Console.WriteLine("course name is " + search.name);
Console.WriteLine("course Description is " + search.description);
Console.WriteLine("course duration is " + search.duration);
searchResult = 1;
}
}
if (searchResult == 0)
{
Console.WriteLine("we cannot find this catloge");
}
break;
case 2:
foreach (var co in courseList)
{
Console.WriteLine("we found course");
Console.WriteLine("course id is " + co.id);
Console.WriteLine("course name is " + co.name);
Console.WriteLine("course Description is " + co.description);
Console.WriteLine("course duration is " + co.duration);
}
break;
case 3:
Console.WriteLine("write your feedback");
string feedback = Console.ReadLine();
Console.WriteLine("thank you ");
break;
}
}
else
{
Console.WriteLine("wrong data");
continue;
}
}
else
{
Console.WriteLine("1- exit");
Console.WriteLine("2- try again");
int y = int.Parse(Console.ReadLine());
if (y == 2)
{
continue;
}
else
{
Environment.Exit(0);
}
}
}
}
}
}
}