void loadChartUser() { double total = Convert.ToDouble(thongKe.GetTongSo("SELECT COUNT(*) FROM dbo.THETHUVIEN")); double totalMale = Convert.ToDouble(thongKe.GetTongSo("SELECT COUNT(*) FROM dbo.THETHUVIEN WHERE Gioitinh=N'Nam'")); double totalFeMale = Convert.ToDouble(thongKe.GetTongSo("SELECT COUNT(*) FROM dbo.THETHUVIEN WHERE Gioitinh=N'Nữ'")); double maleStudentsPercentage = (totalMale * (100 / total)); double fmaleStudentsPercentage = (totalFeMale * (100 / total)); crtUser.Titles.Add("Tổng Số User - " + total + " - 100 %" + "(" + "Đơn Vị %" + ")"); crtUser.Series["s1"].IsValueShownAsLabel = true; crtUser.Series["s1"].Points.AddXY("Nam", maleStudentsPercentage.ToString("0.00")); crtUser.Series["s1"].Points.AddXY("Nữ", fmaleStudentsPercentage.ToString("0.00")); }