This is a part of my view code for Index action of Manage Controller.
<div class="mngimg">
@using (Html.BeginForm("UploadPhoto", "Manage", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<div class="btn btn-default browseimg">
<input type="file" name="file" id="files" onchange="this.form.submit()" />
</div>
<div class="btn btn-default browseimg">
@Html.ActionLink("Remove Photo", "RemovePhoto", "Manage")
</div>
}
</div>
</div>
}
</dd>
<dt>Password:</dt>
<dd>
[
@if (Model.HasPassword) <!-- Here is my error. The Model is null -->
{
@Html.ActionLink("Change your password", "ChangePassword")
}
else
{
@Html.ActionLink("Create", "SetPassword")
}
]
</dd>
Whenever I open this page and click "Remove Photo" I keep getting an error saying that An exception of type 'System.NullReferenceException' occurred in App_Web_ckoryptg.dll but was not handled in user code
. I tried debugging, but I am unable to figure out why my Model.HasPassword is becoming null. Here is my RemovePhoto Action from Manage Controller.
[HttpPost]
public async Task<ActionResult> UploadPhoto(HttpPostedFileBase file)
{
if (file != null && file.ContentLength > 0)
{
var user = await GetCurrentUserAsync();
var userId = user.Id;
var fileExt = Path.GetExtension(file.FileName);
var fnm = userId + ".png";
if (fileExt.ToLower().EndsWith(".png") || fileExt.ToLower().EndsWith(".jpg") || fileExt.ToLower().EndsWith(".gif"))// Important for security if saving in webroot
{
var filePath = HostingEnvironment.MapPath("~/Content/Images/") + fnm;
var directory = new DirectoryInfo(HostingEnvironment.MapPath("~/Content/Images/"));
if (directory.Exists == false)
{
directory.Create();
}
ViewBag.FilePath = filePath.ToString();
file.SaveAs(filePath);
return RedirectToAction("Index", new { Message = ManageMessageId.PhotoUploadSuccess });
}
else
{
return RedirectToAction("Index", new { Message = ManageMessageId.FileExtensionError });
}
}
return RedirectToAction("Index", new { Message = ManageMessageId.Error });// PRG
}
private async Task<ApplicationUser> GetCurrentUserAsync()
{
return await UserManager.FindByIdAsync(User.Identity.GetUserId());
}
I opened a default MVC project that comes with visual studio and I added these extra things that I followed from this tutorial ASP.NET upload images . How do I resolve this?
Edit: This is my RemovePhoto action.
public ActionResult RemovePhoto()
{
string file = "~/Content/Images/" + User.Identity.GetUserId() + ".png";
if(System.IO.File.Exists(Server.MapPath(file)))
System.IO.File.Delete(Server.MapPath(file));
return View("Index");
}
Just Redirect back to your Index
action. That way you don't have to instantiate your Index model in your RemovePhoto
action. Can read more about this pattern here .
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