the view "Delete" or its master was not found asp.net mvc5 - asp.net-mvc-5

Question

I want to be able to upload a file then to download it or delete it. But when I try to delete it, I get this error:
The view 'Delete' or its master was not found or no view engine supports the searched locations. The following locations were searched:
~/Views/FileUpload/Delete.aspx ,~/Views/FileUpload/Delete.ascx, ~/Views/Shared/Delete.aspx,~/Views/Shared/Delete.ascx, ~/Views/FileUpload/Delete.cshtml, ~/Views/FileUpload/Delete.vbhtml, ~/Views/Shared/Delete.cshtml ,~/Views/Shared/Delete.vbhtml .
[HttpGet]
public ActionResult Delete( string deletedfile)
{
string current_usr = User.Identity.GetUserId();
string fullPath = Request.MapPath("~/Files/" + current_usr + "/" + deletedfile);
if (System.IO.File.Exists(fullPath))
{
System.IO.File.Delete(fullPath);
ViewBag.Message="Deleted";
}
var items = GetFiles();
return View(items);
}
// GET: FileUpload
public ActionResult Index()
{
var items = GetFiles();
return View(items);
}
// POST: FileUpload
[HttpPost]
public ActionResult Index(HttpPostedFileBase file)
{
if (file != null && file.ContentLength > 0)
try
{
string current_usr = User.Identity.GetUserId();
//string path = Path.Combine(Server.MapPath("~/Files/"),
// Path.GetFileName(file.FileName));
var folder = Server.MapPath("~/Files/" + current_usr + "/");
if (!Directory.Exists(folder))
{
Directory.CreateDirectory(folder);
}
string path = Path.Combine(String.Format(folder),
Path.GetFileName(file.FileName));
file.SaveAs(path);
ViewBag.Message = "File uploaded successfully";
}
catch (Exception ex)
{
ViewBag.Message = "ERROR:" + ex.Message.ToString();
}
else
{
ViewBag.Message = "You have not specified a file.";
}
var items = GetFiles();
return View(items);
}
public FileResult Download(string downloadedfile)
{
string current_usr = User.Identity.GetUserId();
var FileVirtualPath = "~/Files/" + current_usr + "/" + downloadedfile;
return File(FileVirtualPath, "application/force-download", Path.GetFileName(FileVirtualPath));
}
private List<string> GetFiles()
{
string current_usr = User.Identity.GetUserId();
var dir = new System.IO.DirectoryInfo(Server.MapPath("~/Files/" + current_usr + "/"));
System.IO.FileInfo[] fileNames = dir.GetFiles("*.*");
List<string> items = new List<string>();
foreach (var file in fileNames)
{
items.Add(file.Name);
}
return items;
}
The View :
<h2> File Upload </h2>
#model List<string>
#using (Html.BeginForm("Index", "FileUpload", FormMethod.Post,
new { enctype = "multipart/form-data" }))
{
<label for="file"> Upload </label>
<input type="file" name="file" id="file" />
<br /><br />
<input type="submit" value="Upload" />
<br /><br />
#ViewBag.Message
<br />
<h2>Documents list</h2>
<table style="width:100%">
<tr>
<th> File Name </th>
<th> Link </th>
</tr>
#for (var i = 0; i <= (Model.Count) - 1; i++)
{
<tr>
<td>#Model[i].ToString() </td>
<td>#Html.ActionLink("Download", "Download", new { downloadedfile = Model[i].ToString() }) </td>
<td>
#Html.ActionLink("Delete", "Delete", new { deletedfile = Model[i].ToString() })
</td>
</tr>
}
</table>
}

Answer 1

The issue is that your Delete Controller method is calling View() at the end. That method will attempt to find a view file with the name of the controller method. If you want to show the list of files after the delete you can redirect to your index action like this:
[HttpGet]
public ActionResult Delete(string deletedfile)
{
string current_usr = User.Identity.GetUserId();
string fullPath = Request.MapPath("~/Files/" + current_usr + "/" + deletedfile);
if (System.IO.File.Exists(fullPath))
{
System.IO.File.Delete(fullPath);
ViewBag.Message = "Deleted";
}
return RedirectToAction("Index");
}
See this link from the microsoft Docs for more detail on redirecting
https://learn.microsoft.com/en-us/aspnet/mvc/overview/older-versions-1/views/asp-net-mvc-views-overview-cs