private void btnAdd_Click(object sender, RoutedEventArgs e)
{
if (!string.IsNullOrWhiteSpace(tbSalesId.Text.Trim()) && !string.IsNullOrWhiteSpace(tbSalesName.Text.Trim()))
{
SalesBEL salesBEL = new SalesBEL();
salesBEL.Id = tbSalesId.Text.Trim();
salesBEL.Name = tbSalesName.Text.Trim();
salesBEL.IsEnable = "1";
SalesBLL.insertSales(salesBEL);
SetCurrentSales();
}
}