private void btnRent_Click(object sender, EventArgs e) { int locatorNumber; int employeeNumber; string name = txtName.Text; bool res = int.TryParse(txtClientID.Text, out locatorNumber); bool res2 = int.TryParse(txtClientID.Text, out employeeNumber); DateTime returnDate = Convert.ToDateTime(selectedDate); RequestDB req = new RequestDB(); int objectNumber = req.ReqGetIDFromName(name); string state = req.ReqCheckState(objectNumber); if (state == "disponible") { Employees.RentObject(objectNumber, locatorNumber, employeeNumber, returnDate); ActiveForm.Close(); } else { MessageBox.Show("L'objet est déjà loué !"); ActiveForm.Close(); } }