public void InsertWaiter(Waiter item)
{
using (RestaurantContext context = new RestaurantContext())
{
//Add the item to the DBcontext
var added = context.Waiters.Add(item);
//PS we arent really going to do anything with the variable 'added', I just want you to be aware that the Add() method will return the newly added object. (This can be useful in other situations, which we will see later)
//Save the changes to the database
context.SaveChanges();
}
}
public void DeleteWaiter(Waiter item)
{
using (RestaurantContext context = new RestaurantContext())
{
//First give a reference to the actual item in the DB
//Find() is a method to look up an item by its primary key
var existing = context.Waiters.Find(item.WaiterID);
//Second, remove the item from the DB context
context.Waiters.Remove(existing);
//Lastly, save the changes to the database
context.SaveChanges();
}
}
public void UpdateWaiter(Waiter item)
{
using (RestaurantContext context = new RestaurantContext())
{
//First attach the item to the dbContext collection
var attached = context.Waiters.Attach(item);
//Second, get the entry for the existing data that should match for this specific special event
var existing = context.Entry<Waiter>(attached);
//Third, mark that the object's values have changed
existing.State = System.Data.Entity.EntityState.Modified;
//Lastly, save the changes in the database
context.SaveChanges();
}
}
