C#使用SharpZipLib解压多文件的zip压缩文件数据流，保存到本地

代码:

public async Task<ReturnModel<List<string>>> UploadModel()
        {
            var task = new Task<ReturnModel<List<string>>>(() =>
            {
                var rData = new ReturnModel<List<string>>() { code=101};
                var uploadDir = HttpContext.Current.Server.MapPath("/Content/Resource/ObjModel/");
                var newFileName = "";
                var sp = new MultipartMemoryStreamProvider();
                Task.Run(async () => await Request.Content.ReadAsMultipartAsync(sp)).Wait();
                foreach (var item in sp.Contents)
                {
                    if (item.Headers.ContentDisposition.FileName != null)
                    {
                        var filename = item.Headers.ContentDisposition.FileName.Replace(""", "");
                        newFileName = uploadDir + "\" + filename;
                        var fStream = item.ReadAsStreamAsync().Result;//File.OpenRead(zipFilePath)打开本地压缩文件解压
                        using (var s = new ZipInputStream(fStream))
                        {
                            ZipEntry theEntry;
                            while ((theEntry = s.GetNextEntry()) != null)
                            {
                                string directoryName = Path.GetDirectoryName(theEntry.Name);
                                string fileName = Path.GetFileName(theEntry.Name);
                                if (!string.IsNullOrEmpty(directoryName))
                                {
                                    Directory.CreateDirectory(uploadDir + directoryName);
                                }
                                
                                if (fileName != String.Empty)
                                {
                                    using (System.IO.FileStream streamWriter = File.Create(uploadDir + theEntry.Name))
                                    {

                                        int size;
                                        byte[] data = new byte[2048];
                                        while (true)
                                        {
                                            size = s.Read(data, 0, data.Length);
                                            if (size > 0)
                                            {
                                                streamWriter.Write(data, 0, size);
                                            }
                                            else
                                            {
                                                break;
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }

                return rData;
            });
            task.Start();
            return await task.ContinueWith(t => t.Result);
        }