public static void Main(string[] args)
{
var context = new SoftUniEntities();
var employee = context.Employees.Find(1);
var newName = Console.ReadLine();
employee.FirstName = newName;
Console.ReadLine();
context.SaveChanges();
/* When concurrency mode is not fixed the second record is
* set in the database over the first change.
* When it is fixed exception is raised - DbUpdateConcurrencyException
*/
}
private static void PrintNumberOfEmployeesLinqQuery(SoftUniEntities context)
{
var emplyeedByProject = context.Employees
.Where(e => e.Projects
.Any(p => p.StartDate >= new DateTime(2002, 1, 1) &&
p.StartDate <= new DateTime(2002, 12, 31)))
.OrderBy(e => e.FirstName)
.Select(e => new
{
ManagerName = e.Manager.FirstName + " " + e.Manager.LastName,
Projects = e.Projects
.Where(p => p.StartDate >= new DateTime(2002, 1, 1) &&
p.StartDate <= new DateTime(2002, 12, 31))
})
.ToList();
Console.WriteLine(emplyeedByProject.Count);
}
private static void PrintNumberOfEmployeesNativeQuery(SoftUniEntities context)
{
var employees = context.Employees.SqlQuery(@"
SELECT *
FROM Employees e
JOIN EmployeesProjects ep
ON e.EmployeeID = ep.EmployeeID
JOIN Projects p
ON p.ProjectID = ep.ProjectID
WHERE p.StartDate >= '2002-1-1' AND p.StartDate <= '2002-12-31'")
.ToList();
Console.WriteLine(employees.Count);
}
static void Main(string[] args)
{
// 02.Employee DAO Class
// Uncomment if you want to mess with the db
var employee = Handler.FindByKey(10);
Console.WriteLine(employee.FirstName);
////Handler.Modify(employee, "mitko");
Console.WriteLine(employee.FirstName);
employee.FirstName = "asda";
////Handler.Add(employee);
// 03.Database Search Queries
var context = new SoftUniEntities();
var emplyeedByProject = context.Employees
.Where(e => e.Projects
.Any(p => p.StartDate >= new DateTime(2002, 1, 1) &&
p.StartDate <= new DateTime(2002, 12, 31)))
.OrderBy(e => e.FirstName)
.Select(e => new
{
ManagerName = e.Manager.FirstName + " " + e.Manager.LastName,
Projects = e.Projects
.Where(p => p.StartDate >= new DateTime(2002, 1, 1) &&
p.StartDate <= new DateTime(2002, 12, 31))
})
.Take(5)
.ToList();
var lineCounter = 1;
emplyeedByProject.ForEach(e =>
{
Console.Write("{0}.{1}: ",
lineCounter,
e.ManagerName);
e.Projects.ToList().ForEach(p => Console.Write("{0}: {1:dd-MM-yyyy} ", p.Name, p.StartDate));
Console.WriteLine();
lineCounter++;
});
var addresses = context.Addresses
.OrderByDescending(a => a.Employees.Count())
.ThenBy(a => a.Town.Name)
.Select(a => new
{
Address = a.AddressText,
TownName = a.Town.Name,
EmployeeCount = a.Employees.Count()
})
.Take(10)
.ToList();
addresses.ForEach(a => Console.WriteLine("{0}, {1} - {2} employees",
a.Address, a.TownName, a.EmployeeCount));
var employeeById = context.Employees.Find(147);
var employeeProjects = employeeById.Projects.OrderBy(p => p.Name).Select(p => p.Name);
Console.WriteLine("147. {0} {1} - {2}, {3}", employeeById.FirstName, employeeById.LastName,
employeeById.JobTitle, string.Join(", ", employeeProjects));
var departments = context.Departments
.Where(d => d.Employee.Count > 5)
.OrderBy(d => d.Employee.Count)
.Select(d => new
{
DepartmentName = d.Name,
ManagerName = d.Manager.FirstName + " " + d.Manager.LastName,
Employees = d.Employee.Select(e => new
{
e.FirstName,
e.LastName,
e.HireDate,
e.JobTitle
})
.ToList()
})
.ToList();
departments.ForEach(d =>
{
Console.WriteLine("{0}, {1}: {2}", d.DepartmentName, d.ManagerName, d.Employees.Count);
// To print all employees
////var employeeCounter = 1;
////d.Employees.ForEach(e =>
////{
//// Console.WriteLine("{0}.{1} {2} - {3} {4:dd-MM-yyyy}", employeeCounter,
//// e.FirstName, e.LastName, e.JobTitle, e.HireDate);
//// employeeCounter++;
////});
});
// 04.Native SQL Query
var stopWatch = new Stopwatch();
stopWatch.Start();
PrintNumberOfEmployeesNativeQuery(context);
Console.WriteLine(stopWatch.Elapsed);
stopWatch.Restart();
PrintNumberOfEmployeesLinqQuery(context);
Console.WriteLine(stopWatch.Elapsed);
stopWatch.Stop();
// 06.Call a Stored Procedure
/* Proc used:
* CREATE PROC udp_get_full_names AS
* SELECT FirstName + ' ' + LastName AS [Full name]
* FROM Employees
*/
var employees = context.udp_get_full_names().Take(5);
Console.WriteLine(string.Join(", ", employees));
}