private void GET_TAB_GET_Button_Click(object sender, RoutedEventArgs e) { HttpWebOperation httpGet = new HttpWebOperation(); List<String> result = httpGet.getStudentInfoByGet(URL_TEXTBOX.Text,GET_TAB_ID_No_TEXTBOX.Text); string outputString = ""; CheckBox[] cb = new CheckBox[4]; cb[0] = GET_TAB_CheckBox_Name; cb[1] = GET_TAB_CheckBox_Gender; cb[2] = GET_TAB_CheckBox_Major; cb[3] = GET_TAB_CheckBox_Email_Address; for (int i = 0; i < cb.Length; i++) { if (cb[i].IsChecked == true) outputString += result[i] + "\t"; } GET_TAB_RESULT_TEXTBOX.Text += outputString + "\n"; }