I have added code to the _BillingSummary view of an order in the admin to re-send the order email- this was a customization from the Gold site and it made it a one-step re-send of the email.
The view has
@Ajax.ActionLink("Resend Order Email", "ResendOrderEmail", "Orders", new { orderNumber = Model.OrderNumber }, new AjaxOptions()
{
HttpMethod = "POST",
InsertionMode = InsertionMode.Replace,
UpdateTargetId = "view-order-tab-container",
LoadingElementId = "loader",
OnSuccess="EmailSentSuccess"

}, new { @class = "btn btn-sm btn-warning btn-outline" })

Then ViewOrder.cshtml has the following js
function EmailSentSuccess() {
toastr.success("Email was resent");
}

The OrderController has
[HttpPost]
public ActionResult ResendOrderEmail(int orderNumber)
{
var order = _orderRepo.LoadForOrderNumber(orderNumber);
AbleCommerce.Code.OrderHelper.SendOrderEmail(order);

BillingSummaryModel model = new BillingSummaryModel
{
OrderId = order.Id,
OrderDate = order.OrderDate,
OrderNumber = order.OrderNumber,
BillToEmail = order.BillToEmail,
BillToFax = order.BillToFax,
BillToPhoneNumber = order.BillToPhone,
OrderStatusId = order.OrderStatusId,
OrderStatusName = order.OrderStatus.DisplayName,
BillingAddress = order.FormatAddress(true),
TaxExemptionReference = GetTaxExemptionReference(order)
};

return Json(new { Success = true, Url = Url.Action("ViewOrderTabs", new { OrderNumber = orderNumber }) });
}

This displays the view order page and the green success message, but none of the content normally on the ViewOrder page shows. How can I get the content to show? I can do a redirect- but I'm afraid the green success method wouldn't show then.
Thanks

Also, since the only purpose for this function is to resend an email, other code is not needed except for returning the success in JSON.