private void comboMarka_SelectedIndexChanged(object sender, EventArgs e) { comboModel.DataSource = null; if (comboTip.Items.Count > 0) { comboTip.SelectedIndex = 0; } if ((int)comboMarka.SelectedIndex != 0) { int x = (int)comboMarka.SelectedValue; Automobil auto = new Automobil(); if (x != -1) { List <ModelAutomobilaBL> listaModela = new List <ModelAutomobilaBL>(); listaModela = auto.DohvatiModelFull(x); comboModel.DataSource = listaModela; comboModel.ValueMember = "modelID"; comboModel.DisplayMember = "Naziv"; } } }