<script type="text/javascript">
    $(document).ready(function () {
        $("#sehirID").change(function () {
            $("#ilceID").empty();
            $.ajax({
                type: 'POST',
                url: '@Url.Action("IlceGetir")',
                dataType: 'JSON',
                data: { id: $("#sehirID").val() },
                success: function (states) {
                    $.each(states, function (i, state) {
                        $("#ilceID").append('<option value="' + state.Value + '">' +
                             state.Text + '</option>');
                    });
                },
                error: function (ex) {
                    alert('Failed.' + ex);
                }
            });
            return false;
        })
    });

    </script>