public static void UpdateDistrictsPopulation(int disctrictID)
{
List <int> populationsInEachCity = null;
int totalPopulationOfDistrict = 0;
using (December30Part4DBEntities db = new December30Part4DBEntities())
{
int totalNumberOfDistricts = db.Districts.Select(d => d.ID).Count();
foreach (var item in db.Cities)
{
if (item.District_ID == disctrictID)
{
totalPopulationOfDistrict = (int)item.Population + totalPopulationOfDistrict;
}
//if (item.District_ID == 2)
//{
// totalPopulationOfDistrict2 = (int)item.Population + totalPopulationOfDistrict2;
// db.Districts.First(d => d.ID == 1).Population = totalPopulationOfDistrict2;
//}
}
db.Districts.First(d => d.ID == disctrictID).Population = totalPopulationOfDistrict;
db.SaveChanges();
}
}
public static void RemoveCity(int id)
{
using (December30Part4DBEntities db = new December30Part4DBEntities())
{
City cityToRemove = db.Cities.Where(c => c.ID == id).First();
db.Cities.Remove(cityToRemove);
db.SaveChanges();
}
}
public static void AddCity(City city)
{
using (December30Part4DBEntities db = new December30Part4DBEntities())
{
db.Cities.Add(city);
db.SaveChanges();
}
}
public static void UpdateCity(City city)
{
using (December30Part4DBEntities db = new December30Part4DBEntities())
{
City cityToUpdate = db.Cities.Where(c => c.ID == city.ID).First();
cityToUpdate.Name = city.Name;
cityToUpdate.District_ID = city.District_ID;
cityToUpdate.Mayor = city.Mayor;
cityToUpdate.Population = city.Population;
db.SaveChanges();
}
}
public static List <MyCity> GetAllCitiesFilteredByPopulation(int levelMark)
{
List <MyCity> resultList = null;
using (December30Part4DBEntities db = new December30Part4DBEntities())
{
resultList = db.Cities.Where(c => c.Population >= levelMark).Select(city => new MyCity
{
ID = city.ID,
District_ID = city.District_ID,
Name = city.Name,
Mayor = city.Mayor,
Population = city.Population
}).ToList();
db.SaveChanges();
}
return(resultList);
}
public static MyCity GetCityByID(int id)
{
MyCity result;
using (December30Part4DBEntities db = new December30Part4DBEntities())
{
result = db.Cities.Where(cc => cc.ID == id).Select(city => new MyCity
{
ID = city.ID,
District_ID = city.District_ID,
Name = city.Name,
Mayor = city.Mayor,
Population = city.Population
}).First();
db.SaveChanges();
}
return(result);
}
