I have used ajaxfileupload upon form submission of my form. This is also for uploading purposes for image files. The image was successfully uploaded, however other data to be saved to database wasn't been included? Because it leaves my table fields blank, so I was thinking the values wasn't been passed to the category_save.php. I also observed that when I used the $.ajax({}) instead of $.ajaxFileUpload, the data were all successfully passed and saved in the database including the image file name but the actual file wasn't been uploaded at all. But when I used the $.ajaxFileUpload instead of $.ajax({}), it just work reverse, the file was uploaded but the values wasn't been saved in the database. What is the wrong with this? Here are my codes:

product_form.php

<form method="post" name="new_category" id="product_category" enctype="multipart/form-data"> 
 <ul class="add_prod">
 <li>Category Title:<input type="text" name="category[title]" id="cat_title" value="" placeholder="Title" /> </li>
 <li>Category Description:<textarea rows="4" cols="40" name="category[description]"></textarea></li>
 <li>Category Image:<input type="file" name="image_file" id="image_file" /></li>
 </ul>  
 </form>

product1.js

$("#product_category").submit( function(){

  event.preventDefault();  
   var data_category = $(this).serialize();
   var image = $("#image_file").val();

$.ajaxFileUpload
    (
        {
            type:"post",
            url:"../wp-content/plugins/product_form/category_save.php",
            secureuri:false,
            fileElementId:'image_file',
            dataType: "json",
            data:data_category + "&image_file=" +image,                
            success: function (data)
            {
               if(data.notify == "Success"){
               console.log(data.notify);
              }
             else{
                return false;
              }
            }  
        }
    ); 
 });

product2.js

$("#product_category").submit( function(){
  event.preventDefault();  
   var data_category = $(this).serialize();
   var image = $("#image_file").val();

     $.ajax({
       type: "post",
       url: "../wp-content/plugins/product_form/category_save.php",
       dataType: "json",
       data:data_category + "&image_file=" +image,
       success: function(data){
           if(data.notify == "Success"){
               console.log(data.notify);
           }
           else{
               console.log(data.notify);
           }
       } 

   });

});

category_save.php

<?php 
 //establish connection
 $con = mysqli_connect("localhost","root","","ion2_emagi"); 
 //on connection failure, throw an error
 if(!$con) {  
  die('Could not connect: '.mysql_error()); 
  } 

 $output_dir = "C:/Users/Employees/Dropbox/emagi/wp-content/plugins/product_form/img/";
 $file_name = "image_file"; 

 if(isset($_FILES[$file_name]))
  {
  //Filter the file types , if you want.
  if ($_FILES[$file_name]["error"] > 0)
  {
  echo "Error: " . $_FILES["file"]["error"] . "<br>";
  }
 else
 {  
    //move the uploaded file to uploads folder;
   move_uploaded_file($_FILES["image_file"]["tmp_name"],$output_dir.     $_FILES["image_file"]["name"]);
 }

}

//get the form elements and store them in variables
$category_values = $_POST["category"]; 
$image_url = basename($_POST["image_file"]);
$image_field = "image_url";
$data = array();

//unset($view_all_info['Password2']);
  foreach($category_values as $field => $val){
 $data[] = "`".$field."` = '".$val."'";
 }

 array_push($data,"`".$image_field."` = '".$image_url."'");

 $sql = "INSERT INTO wp_product_category SET ".implode(',', $data);
 $ret = mysqli_query($con,$sql); 

if($ret){
$notification="Success";
}
 else{
 $notification="Failed";
 }

echo json_encode(array('notify'=>$notification));

mysqli_close($con);