codeigniter의 Viewstate 구현

Question

저는 aspnet을 꽤 오랫동안 사용해 왔습니다. PHP로 viewstate를 aspnet으로 구현하고 싶습니다. (정확히 codeigniter에서). Codeigniter로 ASP ViewState를 구현하는 방법이 있습니까?

Answer 1

이 대답은 양식 제출간에 제어 값을 보존하는 Viewstate의 목표 중 일부를 수행합니다. 페이지에서 다른 곳으로 이동하면 데이터가 손실됩니다. 그러나 Viewstate에서도 마찬가지입니다. 예제 코드는 CodeIgniter (CI) 프레임 워크를 많이 사용합니다.

여기에 사용 된 CI의 일부와 관련된 설명서가 있습니다. Form Helper

CI_Form_validation 라이브러리 리디렉션을 통해 검증 결과를 유지할 수없는 앓고 Session

Form Validation

. 이 클래스는 그 한계를 극복하기 위해 CI_Form_validation을 확장합니다.

파일 : 응용 프로그램/라이브러리/

/** 
* Extends CI_Form_validation to facilitate using the Post/Redirect/Get pattern for form handling. 
* https://en.wikipedia.org/wiki/Post/Redirect/Get 
* http://solidlystated.com/design/best-way-to-process-forms-with-php/ 
* 
* The base class (CI_Form_validation) has the protected property $_field_data 
* which holds all the information provided by form_validation->set_rules() 
* and all the results gathered by form_validation->run(). 
* Form Helper and Form_Validation use the $_field_data to re-populate fields and present error messages. 
* 
* To use this class you must have CodeIgniter Session setup and working. 
* 
* This class stores $_field_data in session flash data for use in the controller method that is the 
* redirect target. 
* 
* Class is handy for defining custom validation methods which will NOT require the "callback_" prefix. 
* 
*/ 
defined('BASEPATH') OR exit('No direct script access allowed'); 

class MY_Form_validation extends CI_Form_validation 
{ 

    public function __construct($rules = array()) 
    { 
     parent :: __construct($rules); 
     $this->CI->load->library('session'); 
    } 

    /** 
    * Enhanced version of form_validation->run(). Sets a $_SESSION item with the contents of $this->_field_data 
    * 
    * @param string $group The name of the validation group to run 
    * @param bool $persistent If TRUE save the state of $_field_data even if validation passes 
    * @return boolean TRUE on success and FALSE on failure 
    */ 
    public function run($group = '', $persistent = FALSE) 
    { 
     if(parent:: run($group)) 
     { 
      if($persistent) 
      { 
       $this->CI->session->set_flashdata('validation_field_data', $this->_field_data); 
      } 
      return TRUE; 
     } 
     $this->CI->session->set_flashdata('validation_field_data', $this->_field_data); 
     return FALSE; 
    } 

    /** 
    * This is used in the redirect target defined in the form processing controller/method 
    * 
    * @return bool TRUE if $_SESSION['validation_field_data'] is set. It indicates that validation failed. 
    * Returns FALSE if there is no indication that validation has failed or even been run. 
    */ 
    public function is_failed_validation() 
    { 
     if(isset($_SESSION['validation_field_data'])) 
     { 
      // Validation failed or is being persisted. 
      $this->_field_data = $_SESSION['validation_field_data']; 
      return TRUE; 
     } 
     return FALSE; 
    } 

    /** 
    * A validation function to cleanup strings 
    * 
    * @param string $str Value of the field 
    * @return string|bool The sanitized string or FALSE if filter_var() fails 
    */ 
    public function sanitize_str($str) 
    { 
     return filter_var($str, FILTER_SANITIZE_STRING); 
    } 

    /** 
    * A do-nothing routine assigned to any field we want included in validation results 
    * @return boolean 
    */ 
    public function alwaysTrue($val) 
    { 
     return TRUE; 
    } 

} 

My_Form_validation.php이 희망 코멘트는 무슨 일이 일어나고 있는지 설명한다. 이해해야 할 중요한 점은 form_validation은 유효성 검사 규칙이있는 컨트롤에 대한 $ _POST 데이터 만 캡처한다는 것입니다. 이것이 무효 검증 루틴 alwaysTrue()의 이유입니다. 값을 유지하려는 모든 컨트롤에서이 규칙을 사용하십시오.

다음 컨트롤러는 사용 예를 보여줍니다.

파일 : 응용 프로그램/컨트롤러/

class Viewstate extends CI_Controller { public function __construct() { parent::__construct(); $this->load ->library('form_validation', NULL, 'fv') //renames 'form_validation' to 'fv' ->helper(['form', 'url']); $this->fv->set_error_delimiters('<span class="error">', '</span>'); } public function index() { $this->fv->is_failed_validation(); //captures validation data if it's there //Define some data for consumption by CI's Form Helper functions $data['username_field'] = [ 'name' => 'username', 'id' => 'username', 'value' => $this->fv->set_value('username'), 'class' => 'your_css', ]; $data['confirm_username_field'] = [ 'name' => 'usernameconf', 'id' => 'usernameconf', 'value' => $this->fv->set_value('usernameconf'), 'class' => 'your_css', ]; $data['comment_field'] = [ 'name' => 'comment', 'id' => 'comment', 'value' => $this->fv->set_value('comment'), 'class' => 'comment', ]; $data['project_lead_field'] = [ 'name' => 'project_lead', 'value' => 1, 'checked' => $this->fv->set_radio('project_lead', 1, FALSE) ]; $selected_status = ['None' => "None"]; //default dropdown item $status_items = ["None" => "None", "Good" => "Good", 'Bad' => 'Bad', "Ugly" => "Ugly"]; //recover previously posted select item - if any if($item = $this->session->validation_field_data['status']['postdata']) { $selected_status = [$item => $item]; } $data['status_field'] = [ 'name' => 'status', 'options' => $status_items, 'selected' => $selected_status ]; $this->load->view('testcase_view', $data); } /** * This is the "action" that processes the form's posted data */ public function process() { //set rules and error messages at same time $this->fv ->set_rules('username', 'User Name', ['trim', 'required', 'matches[usernameconf]'], ['required' => '<em>{field}</em> required.', 'matches' => "User Names don't match."]) ->set_rules('usernameconf', '', ['trim', 'required'], ['required' => 'Retyping the User Name is required.']) ->set_rules('comment', "", ['trim', 'sanitize_str']) ->set_rules('project_lead', "", 'alwaysTrue') ->set_rules('status', "", 'alwaysTrue') ; //So an uncheck checkbox will be part of the $_POST array if(!isset($_POST['project_lead'])) { $_POST['project_lead'] = 0; } if(FALSE == $this->fv->run('', TRUE)) { redirect('viewstate'); } else { //do something with field values e.g. //$this->model->instert($_POST); redirect('viewstate'); //to prove the page state is persistent } } } 

Viewstate.php

나는 어떻게 작동 방법과 검증 결과를 리디렉션을 통해 지속 독자들이 볼 수 있도록 몇 가지 실제 현장 검증을 포함했다. 여기
는보기이다

파일 : 애플리케이션 /보기/textcase_view.php

<!DOCTYPE html> 
<html> 
    <head> 
     <title>Test Persistent Page</title> 
     <style type="text/css"> 
      p{ 
       margin: 0; 
      } 
      .error { 
       color: #FF0000; 
       font-size: small; 
      } 
      .fld-label{ 
       color: #555; 
       font-size: .9em; 
      } 
      .comment{ 
       color: Blue; 
       font-weight: bold; 
      } 
      div{ 
       margin-bottom: 1em; 
      } 
      div + .fld-label 
      /*div + .error*/ 
      { 
       margin-bottom: 0; 
      } 
     </style> 
    </head> 
    <body> 
     <?= form_open('viewstate/process'); ?> 

     <span class="fld-label">User Name</span> 
     <div><?= form_input($username_field) ?> 
      <p><?= form_error('username'); ?></p> 
     </div> 

     <div class="fld-label">Retype User Name</div> 
     <div><?= form_input($confirm_username_field) ?> 
      <p><?= form_error('usernameconf'); ?></p> 
     </div> 

     <div class="fld-label">Comment</div> 
     <div><?= form_input($comment_field); ?></div> 

     <div class="fld-label">Project Lead?</div> 
     <div><?= form_checkbox($project_lead_field); ?></div> 

     <div class="fld-label">Status</div> 
     <div><?= form_dropdown($status_field); ?></div> 

     <p><input type="submit" value="Submit"></p> 
     <?= form_close(); ?> 
    </body> 
</html> 

보기 폼 헬퍼 기능을 많이 사용한다 같은 form_open, form_close, form_input 등