Sys.WebForms.PageRequestManagerServerErrorException: An entity object cannot be referenced by multiple instances of IEntityChangeTracker [closed]
- by Mingebag
`Story:
I have a strange error when I try to save something I got this error message
An entity object cannot be referenced by multiple instances of IEntityChangeTracker.
I really don’t know what that is and why is it appear, it appears only when I try to save something my insert and update is working, only when I try to save something in db from my Telerik grid
if (this.annualVacationList != null)
{
List<AnnualVacation> vacationToSave = this.annualVacationList;
IEnumerable<AnnualVacation> existing = paramUser.AnnualVacations;
foreach (AnnualVacation toSave in vacationToSave)
{
AnnualVacation existingItem = existing.Where(x => x.AnnualVacationId == toSave.AnnualVacationId).SingleOrDefault();
if (existingItem == null)
{
ctx.AddToAnnualVacations(toSave);
}
else
{
existingItem.FromDate = toSave.FromDate;
existingItem.ToDate = toSave.ToDate;
existingItem.WorkingTime = toSave.WorkingTime;
existingItem.VacationDays = toSave.VacationDays;
}
}
}
ctx.SaveChanges();
}
After debugging I have seen that the code brake down in the Project.Name.Designer.cs ..... O.o
public void AddToAnnualVacations(AnnualVacation annualVacation)
{
base.AddObject("AnnualVacations", annualVacation);
}
