jQuery populate items into a Select using jQuery ajax json, php

Question

I have a select field. I must fill with options taken from a mysql table.
Here is some little php code I have done using codeigniter framework

$idcateg =         


        

Answer 1

Try the following Code.

In Controller ---------

public function AjaxTest() {

            $rollNumber = $this->input->post('rollNumber');
            $query = "";

            if($rollNumber !="")
            {
               $query = $this->welcome_model->get_students();
            }
            else
            {
               $query = $this->welcome_model->get_students_informationByRoll($rollNumber);
            }

            $array = array($query);
            header('Content-Type: application/json', true);
            echo json_encode($array);

        }

In View Add a Select Option

     
                
                    --Select--
                
            

Now Scripts ----

function CheckAjaxCall()
            {
                $.ajax({
                    type:'POST',
                    url:'welcome/AjaxTest',                    
                    dataType:'json',
                    data:{rollNumber: $('#txtSearchRoll').val()},                    
                    cache:false,
                    success:function(aData){ 

                        $('#myStudents').get(0).options.length = 0;
                        $('#myStudents').get(0).options[0] = new Option("--Select--", "0");        

                        $.each(aData, function(i,item) {
                        $('#myStudents').get(0).options[$('#myStudents').get(0).options.length] = new Option(item[i].Name, item[i].roll);
                                                                                                            // Display      Value
                    });

                    },
                    error:function(){alert("Connection Is Not Available");}
                });

                return false;
            }

Enjoy the code....