public class BlogSample{public string UserName { get; set; }public string Id { get; set; }}

        static UploadManager(){//从配置文件中获取上传文件夹if (String.IsNullOrWhiteSpace(WebConfigurationManager.AppSettings["UploadFolder"]))UploadFolderRelativePath = @"~/upload";elseUploadFolderRelativePath = WebConfigurationManager.AppSettings["UploadFolder"];UploadFolderPhysicalPath = HostingEnvironment.MapPath(UploadFolderRelativePath);if (!Directory.Exists(UploadFolderPhysicalPath))Directory.CreateDirectory(UploadFolderPhysicalPath);}

  <!--<add key="UploadFolder" value="~/UploadFile/">-->

        [SuppressMessage("Microsoft.Usage", "CA2202:Do not dispose objects multiple times")]public static bool SaveFile(Stream stream, string fileName, string userName, string guid){string tempPath = string.Empty, targetPath = string.Empty;try{string tempFileName = GetTempFilePath(fileName);if (userName != null){var contentType = userName;var contentId = guid;tempPath = GetTempFilePath(tempFileName);targetPath = GetTargetFilePath(fileName, contentType, contentId, string.Empty, FilesSubdir);//若上传文件夹中子文件夹未存在则创建var file = new FileInfo(targetPath);if (file.Directory != null && !file.Directory.Exists)file.Directory.Create();using (FileStream fs = File.Open(tempPath, FileMode.Append)){if (stream.Length > 0){SaveFile(stream, fs);}fs.Close();}//上传完毕将临时文件移动到目标文件
                    File.Move(tempPath, targetPath);}}catch (Exception){// 若上传出错，则删除上传到文件夹文件if (File.Exists(targetPath))File.Delete(targetPath);// 删除临时文件if (File.Exists(tempPath))File.Delete(tempPath);return false;}finally{// 删除临时文件if (File.Exists(tempPath))File.Delete(tempPath);}return true;}

         /// <summary>/// 循环读取流到文件流中/// </summary>/// <param name="stream"></param>/// <param name="fs"></param>public static void SaveFile(Stream stream, FileStream fs){var buffer = new byte[4096];int bytesRead;while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) != 0){fs.Write(buffer, 0, bytesRead);}}

            var testSample = new BlogSample() { UserName = "xpy0928", Id = Guid.NewGuid().ToString("N") };if (ModelState.IsValid){var fileName = bModel.BlogPhoto.FileName;var success = UploadManager.SaveFile(bModel.BlogPhoto.InputStream, fileName, testSample.UserName, testSample.Id);if (!success){// TODO(your code)
                }//var filePath = Server.MapPath(string.Format("~/{0}", "File"));//bModel.BlogPhoto.SaveAs(Path.Combine(filePath, fileName));
                ModelState.Clear();}

<httpRuntime targetFramework="4.5"/>

<httpRuntime targetFramework="4.5" executionTimeout="1100"  maxRequestLength="2147483647"/>

<system.web><httpRuntime maxRequestLength="2147483647" executionTimeout="100000" />
</system.web>

<system.webServer><security><requestFiltering><requestLimits maxAllowedContentLength="2147483647" /></requestFiltering></security>
</system.webServer>