private static void DisplayEmployees(DemoDBContext db)
{
//Display all employees
var query = from e in db.Employees
orderby e.EmployeeID
select e;
Console.WriteLine("All employees in the database: ");
foreach (var item in query)
{
Console.WriteLine(item.EmployeeID + " " + item.Name);
}
}
private static void DisplayEmployees(DemoDBContext db)
{
//Display all employees
var query = from e in db.Employees
orderby e.EmployeeID
select e;
Console.WriteLine("All employees in the database: ");
foreach (var item in query)
{
Console.WriteLine(item.EmployeeID + " " + item.Name);
}
}
static void Main(string[] args)
{
using (var db = new DemoDBContext())
{
//Create a new employee
Console.Write("Please enter name of new employee: ");
var name = Console.ReadLine();
var employee = new Employee {
Name = name
};
db.Employees.Add(employee);
db.SaveChanges();
DisplayEmployees(db);
//Ask user for name of an employee to modify
Console.Write("Enter ID of employee to change name: ");
int empID = int.Parse(Console.ReadLine());
Console.Write("Enter new name: ");
string newName = Console.ReadLine();
//Update employee:
Employee empToChange = (from e in db.Employees
where e.EmployeeID == empID
select e).First();
empToChange.Name = newName;
DisplayEmployees(db);
//Ask user for id of an employee to delete
Console.Write("Enter ID of employee to remove: ");
int delID = int.Parse(Console.ReadLine());
//Delete employee
Employee empToRemove = (from e in db.Employees
where e.EmployeeID == delID
select e).First();
if (empToRemove != null)
{
db.Employees.Remove(empToRemove);
db.SaveChanges();
}
//Display employees
DisplayEmployees(db);
}
}
static void Main(string[] args)
{
Database.SetInitializer(new MigrateDatabaseToLatestVersion<DemoDBContext, Configuration>());
using (var db = new DemoDBContext())
{
//Create a new employee
Console.Write("Please enter name of new employee: ");
var name = Console.ReadLine();
var employee = new Employee { Name = name };
db.Employees.Add(employee);
db.SaveChanges();
//Display employees
DisplayEmployees(db);
//Ask user for id of an employee to modify
Console.Write("Enter ID of employee to change name: ");
int empID = int.Parse(Console.ReadLine());
Console.Write("Enter new name: ");
string newName = Console.ReadLine();
//Update employee:
Employee empToChange = (from e in db.Employees
where e.EmployeeID == empID
select e).First();
empToChange.Name = newName;
db.SaveChanges();
//Display employees
DisplayEmployees(db);
//Ask user for id of an employee to delete
Console.Write("Enter ID of employee to remove: ");
int delID = int.Parse(Console.ReadLine());
//Delete employee
Employee empToRemove = (from e in db.Employees
where e.EmployeeID == delID
select e).First();
if (empToRemove != null)
{
db.Employees.Remove(empToRemove);
db.SaveChanges();
}
//Display employees
DisplayEmployees(db);
}
}
