The base functionality I wish to achive is that the contents of a table are updated when a dropdownlist item is selected. This will update when the user makes a new selection and retrieve new information from the database and repopulate the table.
It's also worth noting that the DropDownListFor that I want the .change() to work with is not contained within the AjaxForm but appears elsewhere on the page (admittedly in another form)
To achieve this I looked at this question: Rendering partial view dynamically in ASP.Net MVC3 Razor using Ajax call to Action which does a good job of going part the way of what I want to do.
So far, I have a controller method which handles populating a customized viewmodel for the partial view:
[HttpPost]
public ActionResult CompanyBillingBandDetails(int id = 0)
{
var viewModel = new BillingGroupDetailsViewModel();
var billingGroupBillingBands =
_model.GetAllRecordsWhere<BillingGroupBillingBand>(x => x.BillingGroupId == id).ToList();
foreach (var band in billingGroupBillingBands)
{
viewModel.BillingBands.Add(band.BillingBand);
}
return PartialView("BillingGroupDetailsPartial", viewModel);
}
The ViewModel I wish to populate each call:
public class BillingGroupDetailsViewModel
{
public List<BillingBand> BillingBands { get; set; }
}
The strongly typed model I'm using as a model for the partial view
public class BillingBandsObject
{
public int BillingBandId { get; set; }
public int RangeFrom { get; set; }
public int RangeTo { get; set; }
public Decimal Charge { get; set; }
public int BillingTypeId { get; set; }
public bool Delete { get; set; }
}
The partial view it populates and returns:
@model xxx.xxx.DTO.Objects.BillingBandsObject
<tr>
<td>
@Html.DisplayTextFor(x => x.RangeFrom)
</td>
</tr>
<tr>
<td>
@Html.DisplayTextFor(x => x.RangeTo)
</td>
</tr>
<tr>
<td>
@Html.DisplayTextFor(x => x.Charge)
</td>
</tr>
The Razor code for this section of the page:
<table>
<thead>
<tr>
<th>
Range From
</th>
<th>
Range To
</th>
<th>
Charge
</th>
</tr>
</thead>
<tbody>
@using (Ajax.BeginForm("CompanyBillingBandDetails", new AjaxOptions() { UpdateTargetId = "details", id = "ajaxform" }))
{
<div id="details">
@Html.Action("CompanyBillingBandDetails", new { id = 1 })
</div>
}
</tbody>
</table>
and finally the function I lifted almost straight from Darin's answer:
$(function () {
$('#billinggrouplist').change(function () {
// This event will be triggered when the dropdown list selection changes
// We start by fetching the form element. Note that if you have
// multiple forms on the page it would be better to provide it
// an unique id in the Ajax.BeginForm helper and then use id selector:
var form = $('#ajaxform');
// finally we send the AJAX request:
$.ajax({
url: form.attr('action'),
type: form.attr('method'),
data: form.serialize(),
success: function (result) {
// The AJAX request succeeded and the result variable
// will contain the partial HTML returned by the action
// we inject it into the div:
$('#details').html(result);
}
});
});
});
At the moment I have fought through a number of errors, currently I am faced with :
"Error executing child request for handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'."
However, i feel my understanding of the problem as a whole may be lacking.
Any help appreciated!
