private static void EmployeeWithSalaryOver50000(SoftuniContext context)//4
{
List <String> employeeNames = context.Employees
.Where(e => e.Salary > 50000)
.Select(e => e.FirstName)
.ToList();
foreach (string employeeName in employeeNames)
{
Console.WriteLine(employeeName);
}
//option 2 with LINQ
// List<Employee> employee = context.Employees
// .Where(e => e.Salary > 50000)
// .ToList();
//foreach (var oneEmployee in employee)
// {
// Console.WriteLine(oneEmployee.FirstName);
// }
// option 1 without LINQ
//foreach (var oneEmployee in employee)
//{
// if (oneEmployee.Salary>50000)
// {
// Console.WriteLine($"{oneEmployee.FirstName}");
// }
//}
}
private static void EmployeeFullInfo(SoftuniContext context)//3
{
List <Employee> employee = context.Employees.ToList();
foreach (var oneEmployee in employee)
{
Console.WriteLine($"{oneEmployee.FirstName} {oneEmployee.LastName} {oneEmployee.MiddleName} {oneEmployee.JobTitle} {oneEmployee.Salary}");
}
}
}//12
private static void FindEmployeesWhithSA(SoftuniContext context)//13
{
List <Employee> employee = context.Employees
.Where(e => e.FirstName.StartsWith("SA"))
.ToList();
foreach (var oneEmployee in employee)
{
Console.WriteLine($"{oneEmployee.FirstName} {oneEmployee.LastName} - {oneEmployee.JobTitle} - (${oneEmployee.Salary:f4})");
}
}//13
private static void EmployeesFromSeattle(SoftuniContext context)//5
{
List <Employee> employee = context.Employees
.Where(e => e.Department.Name == "Research and Development")
.OrderBy(e => e.Salary)
.ThenByDescending(e => e.FirstName)
.ToList();
foreach (var oneEmployee in employee)
{
Console.WriteLine($"{oneEmployee.FirstName} {oneEmployee.LastName} from Research and Development - ${oneEmployee.Salary:f2}");
}
}
private static void AddressByTownName(SoftuniContext context)//8
{
List <Address> address = context.Addresses
.OrderByDescending(a => a.Employees.Count)
.ThenBy(t => t.Town.Name)
.Take(10)
.ToList();
foreach (var oneAddress in address)
{
Console.Write($"{oneAddress.AddressText}, {oneAddress.Town.Name}");
Console.WriteLine($" - {oneAddress.Employees.Count} employees");
}
}
private static void DepartmentsWithMoreThan5Employees(SoftuniContext context)//10
{
List <Department> department = context.Departments
.Where(e => e.Employees.Count > 5)
.OrderBy(e => e.Employees.Count)
.ToList();
foreach (var oneDepartment in department)
{
Console.WriteLine($"{oneDepartment.Name} {oneDepartment.Employee.FirstName}");
foreach (var oneEmployee in oneDepartment.Employees)
{
Console.WriteLine($"{oneEmployee.FirstName} {oneEmployee.LastName} {oneEmployee.JobTitle}");
}
}
}
private static void AddingNewAddress(SoftuniContext context)//6
{
//option 1
Address address = new Address();
address.AddressText = "Vitoshka 15";
address.AddressID = 4;
context.Addresses.Add(address);
context.SaveChanges();
Employee emp = context.Employees.FirstOrDefault(e => e.LastName == "Nakov");
emp.Address = address;
context.SaveChanges();
var addresses = context.Employees.OrderByDescending(e => e.AddressID)
.Take(10)
.ToList();
//option 2
// Address newAddress = new Address()
// {
// AddressText = "Vitoshka 15",
// TownID = 4
// };
// Employee employee = null;
// employee = context.Employees
// .Where(e => e.LastName == "Nakov")
// .FirstOrDefault();
// employee.Address = newAddress;
// context.SaveChanges();
// List<string> employeesNewAddress = context.Employees
// .OrderByDescending(e => e.AddressID)
// .Take(10)
// .Select(e => e.Address.AddressText)
// .ToList();
// foreach (var oneAddress in employeesNewAddress)
// {
// Console.WriteLine(oneAddress);
// }
}
private static void IncreaseSalaries(SoftuniContext context)//12
{
List <Employee> employee = context.Employees
.Where(e => e.Department.Name == "Engineering" ||
e.Department.Name == "Tool Design" ||
e.Department.Name == "Marketing" ||
e.Department.Name == "Information Services")
.ToList();
foreach (var oneEmployee in employee)
{
//oneEmployee.Salary = oneEmployee.Salary * 1.12m;
Console.WriteLine($"{oneEmployee.FirstName} {oneEmployee.LastName} (${oneEmployee.Salary})");
//context.SaveChanges(); // to save data base
}
}//12
private static void FindLatest10Projects(SoftuniContext context) //11
{
Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US"); // English - US
//Thread.CurrentThread.CurrentUICulture = new CultureInfo("en-US");
List <Project> project = context.Projects
.OrderByDescending(p => p.StartDate)
.Take(10)
.OrderBy(p => p.Name)
.ToList();
foreach (var oneProject in project)
{
Console.WriteLine($"{oneProject.Name} {oneProject.Description} {oneProject.StartDate} {oneProject.EndDate}");
Console.WriteLine($"{oneProject.Name} {oneProject.Description} {oneProject.StartDate:M/d/yyyy h:mm:ss tt} {oneProject.EndDate}");
}
}
private static void FindEmployeesInPeriod(SoftuniContext context) //7
{
Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US"); // English - US
Thread.CurrentThread.CurrentUICulture = new CultureInfo("en-US");
List <Employee> employee = context.Employees
.Where(e => e.Projects.Count(p => p.StartDate.Year >= 2001 && p.StartDate.Year <= 2003) > 0)
.Take(30)
.ToList();
foreach (var oneEmployee in employee)
{
Console.WriteLine($"{ oneEmployee.FirstName} {oneEmployee.LastName} {oneEmployee.Manager.FirstName}");
foreach (var proj in oneEmployee.Projects)
{
Console.WriteLine($"--{proj.Name} {proj.StartDate} {proj.EndDate}");
}
}
}
}//14
private static void DeleteProjectById(SoftuniContext context)//15
{
var project = context.Projects.Find(2);
foreach (var oneEmployee in project.Employees)
{
oneEmployee.Projects.Remove(project);
}
context.Projects.Remove(project);
context.SaveChanges();
List <Project> projects = context.Projects
.Take(10)
.ToList();
foreach (var oneProject in projects)
{
Console.WriteLine(oneProject.Name);
}
}//15
private static void EmployeeWithId147(SoftuniContext context)//9
{
Employee employee = context.Employees
.Where(e => e.EmployeeID == 147)
.FirstOrDefault();
Console.WriteLine($"{employee.FirstName} {employee.LastName} {employee.JobTitle}");
List <Project> projects = new List <Project>();
foreach (var proj in employee.Projects)
{
projects.Add(proj);
}
var projs = projects.OrderBy(p => p.Name);
foreach (Project p in projs)
{
Console.WriteLine(p.Name);
}
}
}//15
private static void RemoveTowns(SoftuniContext context)//16
{// to do check
Console.Write("Enter town to delete: ");
string town = Console.ReadLine();
Town tn = context.Towns
.Where(t => t.Name == town)
.FirstOrDefault();
List <Address> addrs = context.Addresses
.Where(a => a.Town.Name == town)
.ToList();
context.Towns.Remove(tn);
foreach (Address a in addrs)
{
List <Employee> empls = context.Employees
.Where(e => e.AddressID == a.AddressID)
.ToList();
foreach (Employee e in empls)
{
e.AddressID = null;
}
context.Addresses.Remove(a);
}
context.SaveChanges();
if (addrs.Count == 1)
{
Console.WriteLine($"{addrs.Count} " +
$"address in {town} was deleted");
}
else
{
Console.WriteLine($"{addrs.Count} " +
$"addresses in {town} were deleted");
}
}//16
private static void NativeSQLQuery(SoftuniContext context)
{
Console.WriteLine("This is problem with star -->> '*' ");
}
static void Main(string[] args)
{
SoftuniContext context = new SoftuniContext();
Console.BufferHeight = 380;
Console.WriteLine("Please make your choice. Enter num from 1 do 17");
Console.WriteLine("Select an option:");
Console.WriteLine("3.->Employees full information");
Console.WriteLine("4.->Employees with Salary Over 50000");
Console.WriteLine("5.->Employees from Seattle");
Console.WriteLine("6.->Adding a New Address and Updating Employee");
Console.WriteLine("7.->Find employees in period");
Console.WriteLine("8.->Addresses by town name");
Console.WriteLine("9.->Employee with id 147");
Console.WriteLine("10.->Departments with more than 5 employees");
Console.WriteLine("11.->Find Latest 10 Projects");
Console.WriteLine("12.->Increase Salaries");
Console.WriteLine("13.->Find Employees by First Name starting with SA");
Console.WriteLine("14.->First Letter");
Console.WriteLine("15.->Delete Project by Id");
Console.WriteLine("16.->Remove Towns");
Console.WriteLine("17.->Native SQL Query");
Console.WriteLine("18.->ExploreTheFullSourceCodeOfEF(context)");
int input = 999;
try
{
input = int.Parse(Console.ReadLine());
}
catch (Exception)
{
Console.WriteLine("Type a number form 1 to 10 not different char");
}
switch (input)
{
case 3: EmployeeFullInfo(context); break;
case 4: EmployeeWithSalaryOver50000(context); break;
case 5: EmployeesFromSeattle(context); break;
case 6: AddingNewAddress(context); break;
case 7: FindEmployeesInPeriod(context); break;
case 8: AddressByTownName(context); break;
case 9: EmployeeWithId147(context); break;
case 10: DepartmentsWithMoreThan5Employees(context); break;
case 11: FindLatest10Projects(context); break;
case 12: IncreaseSalaries(context); break;
case 13: FindEmployeesWhithSA(context); break;
case 14: FirstLetter(); break;
case 15: DeleteProjectById(context); break;
case 16: RemoveTowns(context); break;
case 17: NativeSQLQuery(context); break;
case 18: NativeSQLQuery(context); break;
default: break;
}
}
