//04.Implement previous by using native SQL query
private static List<Employee> ListAllEmployeeWithProjectSQL(SoftUniEntities db)
{
List<Employee> employees;
//BOOM!! in MSSQL Doesn't blow
employees = db.Employees.SqlQuery("SELECT COUNT(Name), FirstName + ' ' + LastName FROM Employees JOIN EmployeesProjects ON Employees.EmployeeID = EmployeesProjects.EmployeeID JOIN Projects ON EmployeesProjects.ProjectID = Projects.ProjectID GROUP BY FirstName + ' ' + LastName ORDER BY COUNT(Name) DESC").ToList();
return employees;
}
static void Main()
{
var db = new SoftUniEntities();
var firstId = 0;
//EmployeeID FirstName LastName MiddleName JobTitle DepartmentID ManagerID HireDate Salary AddressID
for (int i = 314; i <= 317; i++)
{
InsertNewEmployee(db, "Sashko", "Sashev", "Sashev", "Production Technician", "Engineering", "svetlin nakov", DateTime.Now, 1234.32, "108 Lakeside Court");
firstId = i;
}
for (int i = firstId; i <= firstId+3; i++)
{
ModifyEmployee(db, i, "Pesho", "Georgiev", "Minchev", "Production Technician", "Engineering", "svetlin nakov", DateTime.Now.AddYears(-10), 187235.32, "108 Lakeside Court");
}
for (int i = firstId; i <= firstId+3; i++)
{
DeleteEmployee(db, i);
}
var employeesWithProjects = ListAllEmployeeWithProjectSQL(db).OrderByDescending(e => e.Projects.Count);
foreach (var employee in employeesWithProjects)
{
Console.WriteLine("|{0,-5}|{1,-20}|{2,-15}|{3,-15}|{4,-25}|{5,-5}|{6,-40}|",
employee.EmployeeID,
employee.FirstName,
employee.LastName,
employee.Salary,
employee.JobTitle,
employee.Projects.Count,
employee.Address.AddressText);
Console.WriteLine(new string('-', 150));
}
SelectAllManagersByDept(db, "Research and Development", "Ken Sanchez");
}
private static void InsertNewEmployee(SoftUniEntities db, string firstName, string lastName, string middleName,
string jobTitle, string department, string manager, DateTime dateTime, double salary, string address)
{
var idDepartment = db.Departments.FirstOrDefault(d => d.Name == department).DepartmentID;
var idManager = db.Employees.FirstOrDefault(e => e.FirstName + " " + e.LastName == manager).EmployeeID;
var idAddress = db.Addresses.FirstOrDefault(a => a.AddressText == address).AddressID;
var newEmployee = new Employee
{
FirstName = firstName,
LastName = lastName,
MiddleName = middleName,
AddressID = idAddress,
ManagerID = idManager,
DepartmentID = idDepartment,
JobTitle = jobTitle,
HireDate = dateTime,
Salary = (decimal)salary
};
db.Employees.Add(newEmployee);
db.SaveChanges();
}
private static void ModifyEmployee(SoftUniEntities db, int id, string firstName, string lastName,
string middleName, string jobTitle, string department, string manager, DateTime dateTime, double salary,
string address)
{
var employee = db.Employees.FirstOrDefault(e => e.EmployeeID == id);
if (employee == null)
{
throw new NullReferenceException();
}
employee.DepartmentID = db.Departments.FirstOrDefault(d => d.Name == department).DepartmentID;
employee.ManagerID = db.Employees.FirstOrDefault(e => e.FirstName + " " + e.LastName == manager).EmployeeID;
employee.AddressID = db.Addresses.FirstOrDefault(a => a.AddressText == address).AddressID;
employee.FirstName = firstName;
employee.LastName = lastName;
employee.MiddleName = middleName;
employee.Salary = (decimal)salary;
employee.HireDate = dateTime;
employee.JobTitle = jobTitle;
db.Entry(db.Employees.FirstOrDefault(e => e.EmployeeID == id)).CurrentValues.SetValues(employee);
db.SaveChanges();
}
//03. finds employees with projects
private static List<Employee> ListAllEmployeeWithProject(SoftUniEntities db)
{
var employees = db.Employees.Where(e => e.Projects.Count != 0).ToList();
return employees;
}
//05.Your task is to write a method that finds all employees by specified department (name) and manager (first name and last name).
private static void SelectAllManagersByDept(SoftUniEntities db, string departmentName, string fullName)
{
var managerId = db.Employees.FirstOrDefault(m => m.ManagerID == null && m.FirstName + " " + m.LastName == fullName).EmployeeID;
var departmentId = db.Departments.FirstOrDefault(d => d.Name == departmentName).DepartmentID;
var employees = db.Employees.Where(e => e.DepartmentID == departmentId && e.ManagerID == managerId);
foreach (var manager in employees)
{
Console.WriteLine(manager.FirstName + " " + manager.LastName);
}
}
private static void DeleteEmployee(SoftUniEntities db, int id)
{
var employee = db.Employees.FirstOrDefault(e => e.EmployeeID == id);
db.Employees.Remove(employee);
db.SaveChanges();
}
