private void nursesearchbutton_Click(object sender, EventArgs e) { if (nursesearchcomboBox.SelectedItem == null) { MessageBox.Show("Please select your search type"); } else { if (nursesearchtextBox.Text == "") { MessageBox.Show("Please type your search"); } else { if (nursesearchcomboBox.SelectedItem.ToString() == "Name") { nursedataGridView.DataSource = null; nursedataGridView.Rows.Clear(); List <Nurse> nlist = da.getNurseByName(nursesearchtextBox.Text); if (nlist.Count != 0) { foreach (var item in nlist) { nursedataGridView.Rows.Add(item.Name, item.Contactno, item.Designation); } } else { MessageBox.Show("No results found"); } } else if (nursesearchcomboBox.SelectedItem.ToString() == "Designation") { nursedataGridView.DataSource = null; nursedataGridView.Rows.Clear(); List <Nurse> nlist = da.getNurseByDes(nursesearchtextBox.Text); if (nlist.Count != 0) { foreach (var item in nlist) { nursedataGridView.Rows.Add(item.Name, item.Contactno, item.Designation); } } else { MessageBox.Show("No results found"); } } } } }