private void FillFormWithItem(Item item)
{
lblId.Content = item.Id;
lblCategory.Content = item.Category.Name;
txtName.Text = item.Name;
txtDescribe.Text = item.Description;
lblStartDate.Content = item.StartDate;
lblEndDate.Content = item.EndDate;
lblSeller.Content = item.SellerUser.UserName;
chkSold.IsChecked = item.State > 0;
lvBids.DataContext = itemService.GetAllBidsByItem(item.Id);
}