private void doctorsearchbutton_Click(object sender, EventArgs e) { if (doctorsearchbycomboBox.SelectedItem == null) { MessageBox.Show("Please select your search type"); } else { if (doctorsearchtextBox.Text == "") { MessageBox.Show("Please type your search"); } else { if (doctorsearchbycomboBox.SelectedItem.ToString() == "Name") { doctordataGridView.DataSource = null; doctordataGridView.Rows.Clear(); List <Doctor> dlist = da.getDoctorByName(doctorsearchtextBox.Text); if (dlist.Count != 0) { foreach (var item in dlist) { doctordataGridView.Rows.Add(item.Name, item.Contactno, item.Designation); } } else { MessageBox.Show("No results found"); } } else if (doctorsearchbycomboBox.SelectedItem.ToString() == "Designation") { doctordataGridView.DataSource = null; doctordataGridView.Rows.Clear(); List <Doctor> dlist = da.getDoctorByDes(doctorsearchtextBox.Text); if (dlist.Count != 0) { foreach (var item in dlist) { doctordataGridView.Rows.Add(item.Name, item.Contactno, item.Designation); } } else { MessageBox.Show("No results found"); } } } } }