public async Task <IActionResult> EditVideo(int?kursId, int?videoId, KursVideo video, IFormFile PhotoUrl)
        {
            if (kursId != null)
            {
                var thisVideo = db.KursVideos.FirstOrDefault(x => x.Id == videoId);
                if (PhotoUrl == null || PhotoUrl.Length == 0)
                {
                    video.PhotoUrl = thisVideo.PhotoUrl;
                }
                else
                {
                    var    imgname   = DateTime.Now.ToString("MMddHHmmss") + PhotoUrl.FileName;
                    string path_Root = env.WebRootPath;

                    string path_to_Images = path_Root + "/kursvideo/" + imgname;
                    using (var stream = new FileStream(path_to_Images, FileMode.Create))
                    {
                        await PhotoUrl.CopyToAsync(stream);
                    }

                    video.PhotoUrl = imgname;
                }

                thisVideo.Free      = video.Free;
                thisVideo.VideoName = video.VideoName;
                thisVideo.Info      = video.Info;
                thisVideo.VideoUrl  = video.VideoUrl;
                thisVideo.PhotoUrl  = video.PhotoUrl;
                thisVideo.KursId    = (int)kursId;
                thisVideo.WorkUrl   = video.WorkUrl;

                await db.SaveChangesAsync();

                return(RedirectToAction("KursEdit", new { Id = video.KursId }));
            }
            else
            {
                return(RedirectToAction("KursList", "Admin"));
            }
        }
        public async Task <IActionResult> AddVideo(int kursId, string VideoName, string Info, string VideoUrl, IFormFile PhotoUrl, bool Free, string WorkUrl)
        {
            if (kursId != 0)
            {
                KursVideo kv = new KursVideo {
                    KursId = kursId, VideoName = VideoName, Info = Info, VideoUrl = VideoUrl, WorkUrl = WorkUrl
                };

                if (Free == true)
                {
                    kv.Free = true;
                }
                if (PhotoUrl == null || PhotoUrl.Length == 0)
                {
                    kv.PhotoUrl = "default.jpg";
                }
                else
                {
                    var    imgname   = DateTime.Now.ToString("MMddHHmmss") + PhotoUrl.FileName;
                    string path_Root = env.WebRootPath;

                    string path_to_Images = path_Root + "/kursvideo/" + imgname;
                    using (var stream = new FileStream(path_to_Images, FileMode.Create))
                    {
                        await PhotoUrl.CopyToAsync(stream);
                    }

                    kv.PhotoUrl = imgname;
                }
                db.KursVideos.Add(kv);
                await db.SaveChangesAsync();

                return(RedirectToAction("KursEdit", new { Id = kv.KursId }));
            }
            else
            {
                return(RedirectToAction("KursList", "Admin"));
            }
        }