private void HomePageCtr_Load(object sender, EventArgs e) { doanhThuBUS.GetDoanhThuForHomePage(labelRevenue); billInfoBus.TotalSold(labelSold); billInfoBus.SoldInDay(labelSoldin1Month); customerBus.CountCustomer(labelCustomers); if (labelSold.Text == "") { labelSold.Text = "0"; } if (labelSoldin1Month.Text == "") { labelSoldin1Month.Text = "0"; } if (labelRevenue.Text == "") { labelRevenue.Text = "0"; } labelRevenue.Text += " VND"; }