private void AddVendorCommand(object model)
{
var vendor = model as Vendor;
if (string.IsNullOrWhiteSpace(vendor.VendorName) || string.IsNullOrWhiteSpace(vendor.Address))
{
return;
}
vendor.CreatedDate = DateTime.Now;
_repositoryManager.AddVendor(vendor);
var list = _repositoryManager.GetVendorBySiteId(SiteId);
Vendors = new ObservableCollection <Vendor>(list);
VendorToAdd = new Vendor();
VendorList = ProcessVendors(list);
SelectedVendor = VendorList.First();
OnPropertyChanged(nameof(SelectedVendor));
}