MVC多图上传

【实例简介】

简单的MVC多图上传实例

public class HomeController : Controller
    {
        /// <summary>
        /// 参数pic为图片路径，多个图片用,间隔 这里为了直观写在参数里 实际应该从数据库读取
        /// </summary>
        /// <param name="pic"></param>
        /// <returns></returns>

        public ActionResult Index(string pic)
        {
            var html = "<i class=\"list\"><img src=\"{0}\" /><i onclick=\"deleteImg(this,'{1}','{2}')\">删除</i></i>";
            if (!string.IsNullOrEmpty(pic))
            {
                if (pic.IndexOf(",") > 0)
                {
                    string[] arrWeb = pic.Split(',');
                    foreach (var item in arrWeb)
                    {
                        ViewBag.PicStr1  = String.Format(html, "/images/"   item, "pic1", item);
                    }
                }
                else
                {
                    ViewBag.PicStr1 = String.Format(html, "/images/"   pic, "pic1", pic);
                }
            }

            return View();
        }

        /// <summary>
        /// 图片实体类
        /// </summary>
        public class UploadFiles
        {
            //图片名字
            public string FileName { get; set; }
            //图片路径
            public string FilePath { get; set; }
            //图片大小
            public string FileSize { get; set; }
        }

        /// <summary>
        /// 获取文件大小
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        private string GetFileSize(long bytes)
        {
            long kblength = 1024;
            long mbLength = 1024 * 1024;
            if (bytes < kblength)
                return bytes.ToString()   "B";
            if (bytes < mbLength)
                return decimal.Round(decimal.Divide(bytes, kblength), 2).ToString()   "KB";
            else
                return decimal.Round(decimal.Divide(bytes, mbLength), 2).ToString()   "MB";
        }

        /// <summary>
        /// 图片上传
        /// </summary>
        /// <returns></returns>
        public JsonResult Upload()
        {
            HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
            if (files.Count == 0) return Json("Faild", JsonRequestBehavior.AllowGet);

            List<UploadFiles> lf = new List<UploadFiles>();
            for (int i = 0; i < files.Count; i  )
            {
                MD5 md5Hasher = new MD5CryptoServiceProvider();
                /*计算指定Stream对象的哈希值*/
                byte[] arrbytHashValue = md5Hasher.ComputeHash(files[i].InputStream);
                /*由以连字符分隔的十六进制对构成的String，其中每一对表示value中对应的元素；例如“F-2C-4A”*/
                string strHashData = System.BitConverter.ToString(arrbytHashValue).Replace("-", "");
                string FileEextension = Path.GetExtension(files[i].FileName);
                string uploadDate = DateTime.Now.ToString("yyyyMMdd");
                string virtualPath = string.Format("/images/{1}{2}", uploadDate, strHashData, FileEextension);
                string fullFileName = Server.MapPath(virtualPath);
                //创建文件夹，保存文件
                string path = Path.GetDirectoryName(fullFileName);
                Directory.CreateDirectory(path);
                if (!System.IO.File.Exists(fullFileName))
                {
                    files[i].SaveAs(fullFileName);
                }
       
                string fileSize = GetFileSize(files[i].ContentLength);

                UploadFiles uf = new UploadFiles();
                uf.FileName = strHashData   FileEextension;
                uf.FilePath = virtualPath;
                uf.FileSize = fileSize;

                lf.Add(uf);
            }


            return Json(new { listPic = lf }, "text/html", JsonRequestBehavior.AllowGet);
        }


    }