public void MainGUI_Load(object sender, EventArgs e) { HSB.TLSL(); HSB.Loadkl(); HSB.AVG(); List <string> l = new List <string>(); foreach (var s in clasDTO.lop) { l.Add(s.TenL1); } dslopcbox.DataSource = l.ToList(); if (UsserrDTO.u.Per != 0) { button14.Visible = true; } if (UsserrDTO.u.Per == 0) { pictureBox3.Visible = false; button1.Visible = false; button2.Visible = false; button3.Visible = false; button4.Visible = false; button5.Visible = false; button6.Visible = false; button7.Visible = false; button9.Visible = true; showinpanel(new DSclass()); } else { if (UsserrDTO.u.Per == 1) { pictureBox3.Visible = false; button1.Visible = false; button2.Visible = false; button3.Visible = false; button4.Visible = false; button5.Visible = false; button6.Visible = false; button7.Visible = false; button8.Visible = false; button9.Visible = false; button10.Visible = true; } else { if (UsserrDTO.u.Per == 2) { button1.Visible = false; button2.Visible = false; button3.Visible = false; button4.Visible = false; button5.Visible = false; button6.Visible = false; button7.Visible = false; button8.Visible = false; button9.Visible = true; button11.Visible = true; button12.Visible = true; button13.Visible = true; } } } }