在 select 框中动态显示值在 codeigniter 中不起作用

Question

我正在尝试获取 select 框中的值，因为动态不起作用下面是我的控制器代码：

public function CreateNewAsset() 
{
    $data['courselist'] = $this->Dashboard_model->getDashboardCourses();
    $this->form_validation->set_error_delimiters('<div class="error">', '</div>');

    //Validating Name Field
    $this->form_validation->set_rules('topicname', 'Topicname', 'required');

   if ($this->form_validation->run() == FALSE) {
        $this->load->view('template/header');
        $this->load->view('Dashboard/CreateNewAsset');
        $this->load->view('template/footer');
    } else {

        //Setting values for tabel columns           
        $data = array(
            'courseid' => $this->input->post('courseid'),
            'topicname' => $this->input->post('topicname'),
            'refid' => $this->input->post('refid'),
            'startdate' => $this->input->post('startdate'),
            'expectedend' => $this->input->post('expectedend')
        );

        //Transfering data to Model
        $this->Dashboard_model->assetInsert($data);
        $data['message'] = 'Data Inserted Successfully';

        //Loading View
        $this->load->view('template/header');
        $this->load->view('Dashboard/CreateNewAsset', $data);
        $this->load->view('template/footer');
    }
}

以下是我的观点：

<form action="<?php echo base_url();?>Dashboard/CreateNewAsset" method="post">
    <div class="form-row">
        <div class="col-md-3">Course:</div>
        <div class="col-md-9"> 
         <select name="courseid" class="form-control">
               <option value="0">Select Course</option>
            <?php foreach ($courselist as $course) { ?>
                <option value="<?php echo $course->id; ?>"><?php echo $course->coursename; ?></option>
            <?php } ?>
        </select>
        </div>
    </div>
</form>

我在同一个函数中添加了获取值和插入。这是我没有在下拉列表中获得值的问题吗任何人都可以帮助我什么是错误的我收到一个错误 Undefined variable: courselist

Answer 1

因为你覆盖了 $data:

，所以像这样更改插入部分

  $insert_data = array(
        'courseid' => $this->input->post('courseid'),
        'topicname' => $this->input->post('topicname'),
        'refid' => $this->input->post('refid'),
        'startdate' => $this->input->post('startdate'),
        'expectedend' => $this->input->post('expectedend')
    );
    $this->Dashboard_model->assetInsert($insert_data);

整个代码应该是这样的：

注意：确保你已经加载了form_validation库和方法getDashboardCoursesreturn一些数据

public function CreateNewAsset() 
{
   $data['courselist'] = $this->Dashboard_model->getDashboardCourses();
   $this->form_validation->set_error_delimiters('<div class="error">', '</div>');
   $this->form_validation->set_rules('topicname', 'Topicname', 'required');

   if ($this->form_validation->run() == FALSE) {
        $this->load->view('template/header');
        $this->load->view('Dashboard/CreateNewAsset',$data);
        $this->load->view('template/footer');
   } 
   else 
   {
      $insert_data = array(
            'courseid' => $this->input->post('courseid'),
            'topicname' => $this->input->post('topicname'),
            'refid' => $this->input->post('refid'),
            'startdate' => $this->input->post('startdate'),
            'expectedend' => $this->input->post('expectedend')
        );
        $this->Dashboard_model->assetInsert($insert_data);
        $data['message'] = 'Data Inserted Successfully';
        $this->load->view('template/header');
        $this->load->view('Dashboard/CreateNewAsset', $data);
        $this->load->view('template/footer');
    }
}

Answer 2

您的 "View" 找不到 courseList 变量。

您需要先将 courseList 添加到您的 data 数组，然后再将其传递给带有表单的视图。

例如：-

data['courseList'] = $this->getCourseList(); // Fetch the list of rows

在 select 框中动态显示值在 codeigniter 中不起作用

Displaying values in select box dynamically is not working in codeigniter

php

mysql

codeigniter

codeigniter-3

codeigniter-database