Hello,

 I have this issue, I am trying to upload files via kendo upload and if the file format is .txt it is uploading the file properly. When I tried the same with .pdf, it always fails. I even tried all other file types like .doc, .xls, .csv etc. but they keep failing. I don't know what I am doing wrong. The following is my implementation of kendo Upload.

 HTML:  <input id="files" type="file" name="files" />

JQUERY: $("#files").kendoUpload(
        {
            multiple:true,
            //upload: onUpload,
            async: {
                saveUrl: "/Bank/Save",
                //removeUrl: "/Bank/Remove",
                autoUpload: true,
            }
        });

C#:  public ActionResult Save(IEnumerable<HttpPostedFileBase> files)
        {
             //The Name of the Upload component is "files"
            if (files != null)
            {
                foreach (var file in files)
                {
                    // Some browsers send file names with full path. This needs to be stripped.
                    var fileName = Path.GetFileName(file.FileName);
                    var physicalPath = Path.Combine(@"C:\New Folder\", fileName);  //Server.MapPath("~/App_Data")

                    // The files are not actually saved in this demo
                    file.SaveAs(physicalPath);
                }
            }

            // Return an empty string to signify success
            return Content("");
        }

        public ActionResult Remove(string[] files)
        {
            // The parameter of the Remove action must be called "fileNames"

            if (files != null)
            {
                foreach (var fullName in files)
                {
                    var fileName = Path.GetFileName(fullName);
                    var physicalPath = Path.Combine(@"C:\New Folder\", fileName);

                    // TODO: Verify user permissions

                    if (System.IO.File.Exists(physicalPath))
                    {
                        // The files are not actually removed in this demo
                        System.IO.File.Delete(physicalPath);
                    }
                }
            }

            // Return an empty string to signify success
            return Content("");
        }