private void FormCreateOrder_Load(object sender, EventArgs e) { try { var list = _logicC.Read(null); if (list != null) { comboBoxCar.DataSource = list; comboBoxCar.DisplayMember = "Model"; comboBoxCar.ValueMember = "Id"; comboBoxCar.SelectedItem = null; } var listClients = _logicP.Read(null); foreach (var client in listClients) { comboBoxClient.DataSource = listClients; comboBoxClient.DisplayMember = "FirstName"; comboBoxClient.ValueMember = "Id"; comboBoxClient.SelectedItem = null; } var listE = _logicE.Read(null); if (listE != null) { comboBoxEmployee.DataSource = listE; comboBoxEmployee.DisplayMember = "FirstName"; comboBoxEmployee.ValueMember = "Id"; comboBoxEmployee.SelectedItem = null; } } catch (Exception ex) { MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error); } }