<tr data-code="TEST1" data-description="Test Product (EACH)" data-whqc="" >
      <td>
        TEST1
      </td>
      <td>
        Test Product (EACH)
      </td>
      <td>
        4
      </td>
      <td style="text-align: center">
        <input name="qty" type="text" class="qty" maxlength="5">
      </td>
    </tr>

var array = [];
    $("#tbl").find("tr[data-code]").each(function () {
        var qty = parseFloat($(this).find(".qty").val()) || 0;
        if (qty > 0) {
            array[array.length] = {
                Code: $(this).attr("data-code"),
                Description: $(this).attr("data-description"),
                Whqc: $(this).attr("data-whqc"),
                Qty: qty
            };
        }
    });