private void RefreshExecute()
{
_firmenDB.RefreshDBContext(); //Refresh DBContext
FirmenList = _firmenDB.GetAllFirmen(); //Get all Firmen into FirmenList
SelectedFirmen = _firmenDB.RefreshEntity(SelectedFirmen); //Refresh the currently selected firmen
//If currently selected Firmen had already been deleted in database by another user, then set to the first item in list
if (SelectedFirmen == null)
{
MessageBox.Show("Die ausgewählten Daten sind nicht mehr in der Datenbank verfügbar.", "Information", MessageBoxButton.OK, MessageBoxImage.Information);
SelectedFirmen = FirmenList[0];
}
}
