private static void Task17_Remove_Towns()
{
string townName = Console.ReadLine();
var context = new SoftuniContext();
using (context)
{
var town = context.Towns
.FirstOrDefault(t => t.Name == townName);
var adresses = context.Addresses
.Where(c => c.Town.Name == townName);
foreach (var adress in adresses)
{
adress.Employees.Clear();
}
if (town != null)
{
town.Addresses.Clear();
context.Towns.Remove(town);
}
Console.WriteLine("{0} adresses in {1} was deleted", adresses.Count(), townName);
}
}
private static void Task15_FindLatest10Projects()
{
var context = new SoftuniContext();
using (context)
{
var projects = context.Projects
.OrderByDescending(project => project.StartDate)
.Take(10)
.OrderBy(project => project.Name);
StringBuilder output = new StringBuilder();
foreach (var project in projects)
{
output.AppendLine($"{project.Name} {project.Description} {project.StartDate} {project.EndDate}");
}
var file = new System.IO.StreamWriter(@"../../latest10projects.txt");
using (file)
{
file.Write(output);
}
}
}
private static void Task6_AddingNewAdressAndUpdatingEmployee()
{
var adress = new Address()
{
AddressText = "Vitoshka 15",
TownID = 4
};
Employee employee = null;
var context = new SoftuniContext();
using (context)
{
var nakov = context.Employees
.Where(employeeLastName => employeeLastName.LastName == "Nakov")
.Take(1);
foreach (var nakovName in nakov)
{
employee = nakovName;
}
context.Addresses.Add(adress);
context.SaveChanges();
var adreesId = context.Addresses
.Where(c => c.AddressText == "Vitoshka 15")
.Select(b => b.AddressID)
.Take(1);
int nakovAdressId = 0;
foreach (var id in adreesId)
{
nakovAdressId = id;
}
employee.AddressID = nakovAdressId;
context.SaveChanges();
var output = context.Employees
.OrderByDescending(c => c.AddressID)
.Select(b => b.Address.AddressText)
.Take(10);
foreach (var line in output)
{
Console.WriteLine(line);
}
}
}
private static void Task18_FindEmployeeByFirstNameStartingWithSA()
{
var context = new SoftuniContext();
using (context)
{
var employees = context.Employees
.Where(c => c.FirstName.StartsWith("SA"));
foreach (var employee in employees)
{
Console.WriteLine($"{employee.FirstName} {employee.LastName} - {employee.JobTitle} - (${employee.Salary})");
}
}
}
private static void Task3_EmployeesFullInformation()
{
var context = new SoftuniContext();
using (context)
{
var emplyoeesFirstNames = context.Employees
.Select(employee => employee.FirstName)
.ToList();
var emplyoeesLastNames = context.Employees
.Select(employee => employee.LastName)
.ToList();
var emplyoeesMiddleNames = context.Employees
.Select(employee => employee.MiddleName)
.ToList();
var emplyoeesJobTitles = context.Employees
.Select(employee => employee.JobTitle)
.ToList();
var emplyoeesSalarys = context.Employees
.Select(employee => employee.Salary)
.ToList();
var employeeCounter = emplyoeesFirstNames.Count;
var outputArray = new string[employeeCounter];
for (int i = 0; i < employeeCounter; i++)
{
outputArray[i] = emplyoeesFirstNames[i]
+ ' '
+ emplyoeesLastNames[i]
+ ' '
+ emplyoeesMiddleNames[i]
+ ' '
+ emplyoeesJobTitles[i]
+ ' '
+ emplyoeesSalarys[i];
}
foreach (var employee in outputArray)
{
Console.WriteLine(employee);
}
}
}
private static void Task4_EmployeesWithSalaryOver50000()
{
var context = new SoftuniContext();
using (context)
{
var employeesNames = context.Employees
.Where(employee => employee.Salary > 50000)
.Select(employee => employee.FirstName);
foreach (string employeeName in employeesNames)
{
Console.WriteLine(employeeName);
}
}
}
private static void Task9_AdressesByTownName()
{
var context = new SoftuniContext();
using (context)
{
var adresses = context.Addresses
.OrderByDescending(c => c.Employees.Count)
.ThenBy(t => t.Town.Name)
.Take(10);
foreach (var adress in adresses)
{
Console.WriteLine($"{adress.AddressText}, {adress.Town.Name} - {adress.Employees.Count} employees");
}
}
}
private static void Task5_EmployeesFromResearchAndDevelopment()
{
var context = new SoftuniContext();
using (context)
{
var employees = context.Employees
.Where(employee => employee.Department.Name == "Research and Development")
.OrderBy(employee => employee.Salary)
.ThenByDescending(employee => employee.FirstName);
foreach (var employee in employees)
{
Console.WriteLine($"{employee.FirstName} {employee.LastName} " +
$"from {employee.Department.Name} - ${employee.Salary:F2}");
}
}
}
private static void Task11_DepartmentsWithMoreThan5Employees()
{
var context = new SoftuniContext();
using (context)
{
var departments = context.Departments
.Where(c => c.Employees.Count > 5)
.OrderBy(d => d.Employees.Count);
foreach (var department in departments)
{
Console.WriteLine($"{department.Name} {department.Manager.FirstName}");
foreach (var employee in department.Employees)
{
Console.WriteLine($"{employee.FirstName} {employee.LastName} {employee.JobTitle}");
}
}
}
}
private static void Task16_IncreaseSalaries()
{
var context = new SoftuniContext();
using (context)
{
var emnployees = context.Employees
.Where(employee => employee.Department.Name == "Engineering" ||
employee.Department.Name == "Tool Design" ||
employee.Department.Name == "Marketing" ||
employee.Department.Name == "Information Services");
foreach (var employee in emnployees)
{
employee.Salary += employee.Salary * (decimal)0.12;
Console.WriteLine($"{employee.FirstName} {employee.LastName} (${employee.Salary:F6})");
}
context.SaveChanges();
}
}
private static void Task7_DeleteProjectById()
{
var context = new SoftuniContext();
using (context)
{
var project = context.Projects.Find(2);
project.Employees.Clear();
context.Projects.Remove(project);
context.SaveChanges();
var allProjectsLeft = context.Projects
.Select(a => a.Name)
.Take(10);
foreach (var projectName in allProjectsLeft)
{
Console.WriteLine(projectName);
}
}
}
private static void Task10_EmployeeWithId147SortedByProjectNames()
{
var context = new SoftuniContext();
using (context)
{
var employee = context.Employees
.FirstOrDefault(c => c.EmployeeID == 147);
if (employee != null)
{
Console.WriteLine($"{employee.FirstName} {employee.LastName} {employee.JobTitle}");
var projects = employee.Projects.OrderBy(project => project.Name);
foreach (var project in projects)
{
Console.WriteLine($"{project.Name}");
}
}
}
}
private static void Task8_FindEmployeesInPeriod()
{
var context = new SoftuniContext();
using (context)
{
var employees = context.Employees
.Where(
employee =>
employee.Projects.Count(
project => project.StartDate.Year >= 2001 && project.StartDate.Year <= 2003) > 0)
.Take(30);
foreach (var employee in employees)
{
Console.WriteLine($"{employee.FirstName} {employee.LastName} {employee.Manager.FirstName}");
foreach (var project in employee.Projects)
{
Console.WriteLine($"--{project.Name} {project.StartDate} {project.EndDate}");
}
}
}
}