public async static Task DeleteInstallationLocation(InstallationLocation itemPara)
{
using (var db = new SalesContext())
{
db.Entry(itemPara).State = EntityState.Unchanged; //NOT DELETE - IMPORTANT
InstallationLocations.Remove(itemPara);
db.Entry(itemPara).State = EntityState.Deleted; // must be executed after deleted it in InstallationLocations
await UpdateDatabase(db);
}
}
public async static Task DeleteManyInstallationLocations(IList itemParas)
{
using (var db = new SalesContext())
{
List <InstallationLocation> list = new List <InstallationLocation>();
foreach (object item in itemParas)
{
list.Add((InstallationLocation)item);
}
foreach (InstallationLocation item in list)
{
db.Entry(item).State = EntityState.Unchanged;
InstallationLocations.Remove(item);
db.Entry(item).State = EntityState.Deleted;
}
await UpdateDatabase(db);
}
}