php - call controller from javascript on view using codeigniter

Answer

Solution:

Here is a simple solution for this to work

AJAX Request

$.ajax({
    type : 'POST',
    data : 'addreceiptkccbranchid='+ $('#addreceiptkccbranch').val(),
    url : '<?php echo site_url("ctl_dbcont/getmembersbybranch");?>',
    success :   function(data){
                $('#addreceiptddsmember').val(data);
    }
});
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Controller

function getmembersbybranch()
{
    $this->load->model('mod_user');
    $addreceiptkccbranchid      =   $_POST['addreceiptkccbranchid'];
    $data['member_by_branch']   =   $this->mod_user->member_receipt_dds($addreceiptkccbranchid);
    $this->load->view('member_by_branch',$data);
}   
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View

<?php
if($member_by_branch){
    foreach($branchlist as $value):
    ?>
    <option value="<?=$value['member_id']?>"><?=$value['member_name']?></option>
    <?php 
    endforeach;
}
?>
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Redirect will not work. Create a simple view for dropdown oprions.

Answer

Solution:

Theredirect statement here is invalid, as it is an AJAX request. You have to send html or json response from server, which you can process at client side. e.g.

$data['member_by_branch']=$this->mod_user->member_receipt_dds($addreceiptkccbranchid);
echo $data['member_by_branch']; //assuming its html
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so on client side, you just have to use this statment in you callback method.

$('#addreceiptddsmember').html(data);
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Answer

Solution:

try this:

Replace your js function by this function:

$("#addreceiptddsmember").live("change",function(){

   var htmlString="";
     $.ajax({
        type:'POST',
        data:'addreceiptkccbranchid='+ $('#addreceiptkccbranch').val(),
        url:'ctl_dbcont/getmembersbybranch',
        datatype:'application/json',
        success:function(data){
          $.each(data,function(i){
             htmlString+="<option  value='"+data[i].branch_id+"'>"+ data[i].branch_name +"</option>"
          });
          $('#addreceiptddsmember').html(htmlString);
     }
  });
});
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in this you have to makehtmlsting and append to selected list using jquery it won't be available in php foreach as you were doing using in the view code.

also remove

redirect('view_addreceipts');
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& replace it by:

echo json_encode($data);
exit;
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in the controller

hope it help!