<form action="/Home/Upload" enctype="multipart/form-data" method="post"> <input type="file" name="file" required="required" /> <input type="submit" name="subt" value="Upload File"/> </form>

 public ActionResult Upload()
        {
            HttpPostedFileBase file = Request.Files["file"]; if (file != null)
            { var fileName = file.FileName;//Path.GetExtension() 也许可以解决这个问题，先不管了。 if (fileName.LastIndexOf("\\", System.StringComparison.Ordinal) > -1)//在不同浏览器下，filename有时候指的是文件名，有时候指的是全路径，所有这里要要统一。  {
                    fileName = fileName.Substring(fileName.LastIndexOf("\\", System.StringComparison.Ordinal) + 1);//IndexOf 有时候会受到特殊字符的影响而判断错误。加上这个就纠正了。  } var image = Path.GetExtension(fileName.ToLower()); if (image != ".bmp" && image != ".png" && image != ".gif" && image != ".jpg")// 判断格式  { return View("Index"); //  } var filepath = Path.Combine(HttpContext.Server.MapPath("../Content/UploadFiles/"), fileName); //string filename = file.FileName; //string savePath = Server.MapPath(("../Content/UploadFiles/") + filename);  file.SaveAs(filepath);
            } return View("Index");

        }

   public List<FileDescription> GetAllFileDescription()
        { string uploadFolder = Server.MapPath("../Content/UploadFiles"); string[] files = Directory.GetFiles(uploadFolder);//获取多个类型格式的文件 var fileDescriptions = new List<FileDescription>(); foreach (var file in files)
            { var fileInfo=new FileInfo(file);
                fileDescriptions.Add( new FileDescription
                        {
                            Name = fileInfo.Name,
                            Size = (float)fileInfo.Length/1024,//这里得到的是k WebPath = Path.Combine(HttpContext.Server.MapPath("../Content/UploadFiles/"), fileInfo.Name),
                            DateCreated = fileInfo.CreationTime
                        }
                    );
            } return fileDescriptions;


        }