Question

此代码不会显示任何结果。我想将一个变量从ajax传递给控制器，然后从模型中找到值并将其传递给ajax;我希望在代码中显示一条消息。

查看 - test_view.php

 <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
      <script type="text/javascript">

         $(document).ready(function(){
            $("#btnclick").click(function(){

            var cname=$("#txt_uname").val();

             //alert(cname);

              $.ajax({
                    type:"post",
                    url:"http://localhost/NPOS/test/nameget",
                     data:{txt_uname : cname},
                        success:function(data){
                        if(data==0){
                            $("#message").html("<font color='#55DF00'>Name Available</font>");
                        }
                        else{
                            $("#message").html("<font color='#FF0000' >Name Already taken</font>");
                        }
                    }
                 });

            });

         });

       </script>
    <input type="text" name="txt_uname" id="txt_uname"/>
    <input name="btnclick" type="button" id="btnclick" value="Search">

Controller - test.php

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Test extends CI_Controller {

      public function index()
      {
           $this->load->view('test_view');
          }


 function nameget()
    {   $this->load->model('test_model');
        $name= $this->input->post('txt_uname'); 
        $find=$this->test_model->nameget($name);

    }
}

?>

model - test_model.php

class Test_Model extends CI_Model
{

        function nameget($name)
    {
        $query=$this->db->query("SELECT * from countries where country_name='$name'");
          return $query->result();
    } 
}

Answer 1

使用此Ajax代码

<script type="text/javascript">

    $(document).ready(function(){
        $("#btnclick").click(function(){

            var cname=$("#txt_uname").val();

            //alert(cname);

            $.ajax({
                type:"post",
                url:"<?php echo base_url() ?>test/nameget",
                data:{txt_uname : cname},
                success:function(data){
                    if(data==0){
                        $("#message").html("<font color='#55DF00'>Name Available</font>");
                    }
                    else{
                        $("#message").html("<font color='#FF0000' >Name Already taken</font>");
                    }
                }
            });

        });

    });

</script>

数据发送和网址已更改

Opz忘了这个

在模型中

function nameget($name)
{
    $query=$this->db->query("SELECT * from countries where country_name='$name'");
    $result = $query->result_array();
    return $result;
}

Answer 2

在ajax代码的标题中使用它：

$(document).ready(function(){
        $("#btnclick").click(function(){
            var BASE_PATH='<?php echo base_url() ?>';
            var cname=$("#txt_uname").val();
            $.post(BASE_PATH+"test/nameget",{txt_uname:cname},function(data){
                    if(data==1){
                         $("#message").html("<font color='#FF0000' >Name Already taken</font>");
                    }else{
                         $("#message").html("<font color='#55DF00' >Name Available</font>");
                    }
            });

        });
});

在控制器中添加此功能

//Function in controller for call model function and return the response
function nameget(){
    $this->load->model('test_model');
    $txt_uname=$this->input->post('txt_uname');
    $check_availablity=$this->test_model->nameget($txt_uname);
    if($check_availablity==TRUE){
        echo 1;
    }else{
        echo 0;
    }
}

在模型中添加以下功能：

//Function in model for fetch data from table
function nameget($txt_uname=''){
    if($txt_uname=='') 
        return false;
    $this->db->select('*');
    $this->db->from('countries');
    $this->db->where(array('country_name'=>$txt_uname));
    $recordSet = $this->db->get();
    $data=$recordSet->result() ;
    if(count($data)>0)
    {
        return true;
    }else
    {
        return false;
    }
}

在codeigniter中在ajax和controller之间传递数据

2 个答案: