public void Add(UserMeter newUserMeter)
{
UserMeter oldUserMeter;
lock (Lock)
{
if ((oldUserMeter = ctx.UserMeters.Find(newUserMeter.Id)) != null)
{
throw new Exception($"Element with ID : {newUserMeter.Id} is already found in database.");
}
else
{
ctx.UserMeters.Add(newUserMeter);
ctx.SaveChanges();
}
}
}
public void ModifyId(int oldId, int newId)
{
UserMeter oldUserMeter;
lock (Lock)
{
if ((oldUserMeter = ctx.UserMeters.Find(oldId)) == null)
{
throw new Exception($"Element with ID : {oldId} not found.");
}
else
{
UserMeter newUserMeter = new UserMeter()
{
Id = newId, ElectricEnergy = oldUserMeter.ElectricEnergy, Name = oldUserMeter.Name
};
Delete(oldId);
Add(newUserMeter);
ctx.SaveChanges();
}
}
}