How can i upload data from datalist by checkbox

I try to keep the data and insert into sql when row selected by checkbox from datalist table after user push Submit button

Checkbox Conditions

$CheckBox = $_POST["dataset"];
if(isset($_POST["Submit"]))
{
    if(empty($CheckBox) || $CheckBox == 0 ) {   
        echo "Please select data after click submit !!";
    }else{
        foreach($_POST["dataset"] as $i) 
        {
            $query = "INSERT INTO r (id,accountcode,orders)
                    VALUES('{$_POST['txtID'][$i]}','{$_POST['txtACC'][$i]}','{$_POST['txtITM'][$i]}')";
            $Q_INSERT = mysqli_query($conn,$query);                                     
        }
    }
    if($Q_INSERT)
    {
        echo "<script> alert('SUCCESS !')</script>";
    }

}

datalist table

$i=0;

while($i<$numr && $ven2 = $ven->fetch_assoc())
{

?>

<tr> 
    <td><center><input type="hidden" name="txtID[]" id="txtID" value="<?php echo $ven2["id"];?>"><?php echo $ven2["id"];?></center></td>
    <td><center><input type="hidden" name="txtACC[]" id="txtACC" value="<?php echo $ven2["acc_name"];?>"><?php echo $ven2["acc_name"];?></center></td>
    <td><input type="hidden" name="txtITM[]" id="txtITM" value="<?php echo $ven2["item_name"];?>"><?php echo $ven2["item_name"];?></td>
    <td><center><input type="checkbox" name="dataset[]" id="dataset" value="<?php echo $i++; ?>" ></center></td>  
</tr>