private void createMarkKafedra(int idCurrentKafedra, MarkObjectKafedra m, Criteria_Kafedra selectedCriteria)
        {
            Mark_Kafedra newMarkKafedra = new Mark_Kafedra();

            newMarkKafedra.Id_Kafedra  = idCurrentKafedra;
            newMarkKafedra.Id_Criteria = m.CriteriaId;
            newMarkKafedra.Kolvo_ed    = m.Count;
            if (m.NewFiles == null || m.NewFiles[0] == null)
            {
                newMarkKafedra.Status = -2;
            }
            else
            {
                newMarkKafedra.Status = 0;
            }
            newMarkKafedra.Kolvo_Mark = (int)selectedCriteria.Mark * m.Count;
            newMarkKafedra.Date       = DateTime.Now;

            if (m.NewFiles != null)
            {
                newMarkKafedra.Status_Doc_Kafedra = new List <Status_Doc_Kafedra>();
                foreach (var item in m.NewFiles)
                {
                    if (item != null)
                    {
                        var document = new Status_Doc_Kafedra()
                        {
                            Link_Doc    = Guid.NewGuid() + Path.GetFileName(item.FileName),
                            Name        = item.FileName,
                            FileType    = item.ContentType,
                            FileContent = item.ContentLength
                        };
                        newMarkKafedra.Status_Doc_Kafedra.Add(document);
                        item.SaveAs(Path.Combine(Server.MapPath("~/documents"), document.Link_Doc));
                    }
                }
            }
            db.Mark_Kafedra.Add(newMarkKafedra);
            db.SaveChanges();
        }
        private void refreshDocs(List <Status_Doc_Kafedra> oldFiles, MarkObjectKafedra m, Mark_Kafedra editMarkK)
        {
            bool isChanged = false;


            if (oldFiles.Count != 0)
            {
                for (int i = 0; i < m.IsRemoved.Count; i++)
                {
                    if (m.IsRemoved[i])
                    {
                        db.Status_Doc_Kafedra.Remove(oldFiles[i]);
                        string fullPath = Request.MapPath("~/documents/" + oldFiles[i].Link_Doc);
                        if (System.IO.File.Exists(fullPath))
                        {
                            System.IO.File.Delete(fullPath);
                        }
                        isChanged = true;
                    }
                }
            }

            if (m.NewFiles != null)
            {
                if (oldFiles.Count == 0)
                {
                    editMarkK.Status_Doc_Kafedra = new List <Status_Doc_Kafedra>();
                }

                foreach (var nf in m.NewFiles)
                {
                    if (nf != null)
                    {
                        var document = new Status_Doc_Kafedra()
                        {
                            Link_Doc    = Guid.NewGuid() + Path.GetFileName(nf.FileName),
                            Name        = nf.FileName,
                            FileType    = nf.ContentType,
                            FileContent = nf.ContentLength
                        };
                        editMarkK.Status_Doc_Kafedra.Add(document);
                        nf.SaveAs(Path.Combine(Server.MapPath("~/documents"), document.Link_Doc));

                        isChanged = true;
                    }
                }
            }

            if (isChanged)
            {
                editMarkK.Date = DateTime.Now;
                int cntRemoved = 0;
                if (m.IsRemoved != null)
                {
                    foreach (var r in m.IsRemoved)
                    {
                        if (r)
                        {
                            cntRemoved++;
                        }
                    }
                }
                bool bc = false;
                if (m.ExistingFiles != null)
                {
                    if (m.ExistingFiles.Count == cntRemoved && (m.NewFiles == null || m.NewFiles[0] == null))
                    {
                        editMarkK.Status = -2;
                        bc = true;
                    }
                }
                else if (m.NewFiles == null || m.NewFiles[0] == null)
                {
                    editMarkK.Status = -2;
                    bc = true;
                }

                if (!bc)
                {
                    editMarkK.Status = 0;
                }
            }

            db.SaveChanges();
        }