[HttpPost]

        public void UploadFile(string filePath)

        {

            UserInfo userInfo = Session["user"] as UserInfo;

            //保证路径格式一直以/结束

            filePath = filePath.TrimEnd('/') + "/";

            if (userInfo == null)

            {

                RedirectToAction("Login", "UserInfo");

            }

            filePath = filePath == "/" ? "/NetDisk/" : filePath;

            var files = Request.Files;

            MyFile myFile = null;

            if (files.Count > )

            {

                var file = files[];

                string fileName = file.FileName;

                Stream inputStream = file.InputStream;

                string fileSaveFolder = Server.MapPath("~/NetDisk");

                //如果目标不存在，则创建

                if (!Directory.Exists(fileSaveFolder))

                {

                    Directory.CreateDirectory(fileSaveFolder);

                }

                byte[] buffer = new byte[inputStream.Length];

                //判断是否已经超出个人网盘大小

                var myFiles = _myFileServiceRepository.FindAll(x => x.User.Id == userInfo.Id && x.IsDelete == false);

                int myDiskSize = ;

                if (myFiles.Count() > )

                {

                    myDiskSize = myFiles.Sum(x => x.FileSize);

                }

                //如果已经超出网盘大小，则给出提示

                if (myDiskSize + buffer.Length > userInfo.NetDiskSize)

                {

                    AlertMsg("对不起，您的网盘空间不足，请清理后再次上传，或联系管理员进行扩容。", "");

                    return;

                }

                inputStream.Read(buffer, , buffer.Length);

                string strFileMd5 = MD5Helper.GetMD5FromFile(buffer);

                string fileSavePath = Path.Combine(fileSaveFolder, filePath);

                //名称格式一律以md5命名。

                string strNewName = strFileMd5 + Path.GetExtension(file.FileName);

                fileSavePath = Path.Combine(fileSaveFolder, strNewName);

                //如果文件不存在，则保存物理文件。

                if (!System.IO.File.Exists(fileSavePath))

                {

                    file.SaveAs(fileSavePath);

                }

                //判断在数据库中同一路径下，md5相同，名称相同的文件是否存在，不存在则直接插入，否则对文件进行自动重命名保存。

                var fileIsExist = _myFileServiceRepository.Find(x => x.FileMd5 == strFileMd5 && x.User.Id == userInfo.Id && x.FileName == fileName);

                //如果找到的文件对象不为空，并且是删除状态，则修改删除状态，不再新增文件信息，否则添加。

                //查询导航属性

                var currentUser = _userInfoServiceRepository.Find(x => x.Id == userInfo.Id);

                if (fileIsExist != null)

                {

                    myFile = fileIsExist;

                    //文件被逻辑删除了，则更新状态，否则重命名后新增文件。

                    if (fileIsExist.IsDelete)

                    {

                        fileIsExist.IsDelete = false;

                        _myFileServiceRepository.Update(fileIsExist);

                    }

                    else

                    {

                        //查找该用户下类似文件名的文件并且没有被逻辑删除的个数

                        var count = _myFileServiceRepository.FindAll(x => x.User.Id == userInfo.Id && x.IsDelete == false && x.FileName.Contains(fileName)).Count();

                        fileName = count >  ? Path.GetFileNameWithoutExtension(fileName) + "(" + (count + ).ToString() + ")" + Path.GetExtension(fileName) : fileName;

                        myFile = new MyFile()

                        {

                            FileMd5 = strFileMd5,

                            ModifyDt = DateTime.Now,

                            IsDelete = false,

                            FileSize = buffer.Length,

                            FolderPath = filePath,

                            FileExt = Path.GetExtension(fileSavePath),

                            CreateDt = DateTime.Now,

                            FileName = fileName,

                            FileIcon = GetFileIcon(Path.GetExtension(fileSavePath)),

                            User = currentUser,

                            IsFolder =

                        };

                        //保存数据库

                        _myFileServiceRepository.Add(myFile);

                    }

                }

                else

                {

                    //新增文件信息

                    myFile = new MyFile()

                    {

                        FileMd5 = strFileMd5,

                        ModifyDt = DateTime.Now,

                        IsDelete = false,

                        FileSize = buffer.Length,

                        FolderPath = filePath,

                        FileExt = Path.GetExtension(fileSavePath),

                        CreateDt = DateTime.Now,

                        FileName = fileName,

                        FileIcon = GetFileIcon(Path.GetExtension(fileSavePath)),

                        User = currentUser,

                        IsFolder =

                    };

                    //保存数据库

                    _myFileServiceRepository.Add(myFile);

                }

                _myFileServiceRepository.SaveChanges();

                string json = new JavaScriptSerializer().Serialize(myFile);

                AlertMsg("上传成功", json);

            }

        }