I'm getting a 500 internal server error when I click on an Ajax.ActionLink
. I have a profile page that's made up of a number of partials. Each partial makes Ajax calls to the server to allow for editing of user information related to that specific partial.
I've implemented 3 partials with said functionality that work fine. The one I'm working on now should initially show a list of uploaded images - if the user hasn't uploaded any images the Ajax.ActionLink
mentioned previously will be shown, which when clicked will bring the user to a partial that facilitates image uploading.
Here's what I'm seeing in Chrome when I hit the link:
Here's the GET and POST ActionResults
:
//
// GET: /Tenants/TenantUploadReference
[HttpGet]
public ActionResult TenantUploadReference()
{
try
{
var currentTenant = tenantRepository.GetLoggedInTenant();
if (currentTenant.ReferencePhotos == null)
{
currentTenant.ReferencePhotos = currentTenant.ReferencePhotos ?? new List<ReferencePhoto>();
}
return PartialView("_TenantUploadReferencePartial", currentTenant.ReferencePhotos.ToList());
}
catch (Exception e)
{
ModelState.AddModelError("", e);
return View();
}
}
//
// POST: /Tenants/TenantUploadReference
[HttpPost]
public ActionResult TenantUploadReference(HttpPostedFileBase file, Tenant tenant)
{
try
{
if (file != null)
{
if (file.ContentLength > 10240)
{
ModelState.AddModelError("file", "The size of the file should not exceed 10 KB");
return View();
}
var supportedTypes = new[] { "jpg", "jpeg", "png", "JPG", "JPEG", "PNG" };
var fileExt = System.IO.Path.GetExtension(file.FileName).Substring(1);
if (!supportedTypes.Contains(fileExt))
{
ModelState.AddModelError("photo", "Invalid type. Only the following types (jpg, jpeg, png) are supported.");
return View();
}
using (var db = new LetLordContext())
{
var reference = db.Image.Create<ReferencePhoto>();
// Convert HttpPostedFileBase to byte array
MemoryStream target = new MemoryStream();
file.InputStream.CopyTo(target);
byte[] photo = target.ToArray();
reference.File = photo;
reference.Format = fileExt;
reference.DateUploaded = DateTime.Now.Date;
reference.Description = "";
reference.Name = "";
db.Image.Add(reference);
db.SaveChanges();
return PartialView("_TenantReferencePhotosPartial", file);
}
}
else
{
return View();
}
}
catch (Exception e)
{
ModelState.AddModelError("", e);
return View();
}
}
When I step through the debugger with a break point on the GET ActionResult
it hits return PartialView
and no exceptions are thrown.
In _TenantUploadReferencePartial
I use
@using (Ajax.BeginForm("TenantUploadReference", "Tenants", FormMethod.Post,
new AjaxOptions
{
InsertionMode = InsertionMode.Replace,
HttpMethod = "POST",
UpdateTargetId = "tenant-reference-photos"
}))
and in _TenantReferencePhotosPartial
(where the ActionLink
throws 500 error) I use this
@if (Model.ReferencePhotos == null)
{
<h3>You haven't uploaded any references!
@Ajax.ActionLink("Upload now?",
"TenantUploadReference",
new AjaxOptions
{
UpdateTargetId = "tenant-reference-photos",
InsertionMode = InsertionMode.Replace,
HttpMethod = "GET",
LoadingElementId = "ajax-loader"
})</h3>
It may also be useful to know that other partials on the page work as expected, so I don't think it's an issue with missing scripts. I'm at a loss as to why this is happening - a solution would be much appreciated.
I've solved the problem. I was returning currentTenant.ReferencePhotos.ToList()
which threw a ArgumentNullException
. Now I'm returning just currentTenant
, and the GET is working as expected.
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