public void TestSaveSupplierMng()
        {
            AppDomain.CurrentDomain.SetData("DataDirectory", AppDomain.CurrentDomain.BaseDirectory);

            using (var db = new PurchaseEntities())
            {
                SupplierMng supplier = db.SupplierMng.Find(0);
                // supplier.SupplierName = "供应商名称2";
                supplier.SupplierMngAttachmentFile.Clear();
                for (int i = 0; i < 2; i++)
                {
                    SupplierMngAttachmentFile attach = new SupplierMngAttachmentFile();
                    attach.FileName    = "fileName1";
                    attach.SeqNO       = i + 1;
                    attach.SupplierId  = supplier.Id;
                    attach.SupplierMng = supplier;
                    attach.UploadChk   = true;
                    attach.InDateTime  = DateTime.Now;
                    attach.InUserId    = "admin";

                    supplier.SupplierMngAttachmentFile.Add(attach);
                }
                db.SaveChanges();
            }
        }
        public ActionResult DeleteAttach(int id, int seqNo)
        {
            SupplierMngAttachmentFile attach = db.SupplierMngAttachmentFile.Where(x => x.SupplierId == id && x.SeqNO == seqNo).FirstOrDefault();

            db.SupplierMngAttachmentFile.Remove(attach);
            db.SaveChanges();
            // DeleteFile(id + "_" + seqNo);
            return(Json("", JsonRequestBehavior.AllowGet));
        }
        private void SavePng(SupplierMng supplierMng)
        {
            supplierMng.SupplierMngAttachmentFile.Clear();
            string[] attachs = Request.Form["AttachPngs"].Split(',');
            for (int i = 0; i < attachs.Length; i++)
            {
                int seqNo = i + 1;
                SupplierMngAttachmentFile attach = new SupplierMngAttachmentFile();
                attach.FileName    = attachs[i];
                attach.SeqNO       = seqNo;
                attach.SupplierId  = supplierMng.Id;
                attach.SupplierMng = supplierMng;
                attach.UploadChk   = !string.IsNullOrWhiteSpace(attach.FileName);
                attach.InDateTime  = DateTime.Now;
                attach.InUserId    = UserInfo.InUserId;

                supplierMng.SupplierMngAttachmentFile.Add(attach);
            }
        }