MVC多张图片上传

1. 在视图中要写

@using (Html.BeginForm("AddProductaction","Admin",FormMethod.Post, new { enctype = "multipart/form-data" })) 
{

<input type="file" multiple id="pic_selector" name="ImgUrl" />

}

2. 在控制器中

//前台页面通过 < file name = "img" > 标签数组上传图片，后台根据Request.Files["img"]来接收前台上传的图片。
            System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;
            if (files.Count == 0)
                return View();
            for (int i = 0; i < files.AllKeys.Count(); i++)
            {
                if (files.AllKeys[i] != "img")
                {
                    if (files[i].FileName.Length > 0)
                    {
                        System.Web.HttpPostedFile postedfile = files[i];
                        string filePath = "";
                        var ext = Path.GetExtension(postedfile.FileName);
                        var fileName = DateTime.Now.Ticks.ToString() + ext;
                        // 组合文件存储的相对路径
                        filePath = "/UploadImg/" + fileName;
                        // 将相对路径转换成物理路径
                        var path = Server.MapPath(filePath);
                        postedfile.SaveAs(path);
                        string fex = Path.GetExtension(postedfile.FileName);
                        //存储产品轮播图信息
                       
                    }
                }

            }

　　3.  上传单个图片

private string SaveImg(HttpPostedFileBase file, string fileName, int userID)
        {
            //图片路径：Upload+当前日期+当前userID
            string filePath = "/Upload/"+DateTime.Now.ToString("yyyy-MM-dd")+"/"+userID.ToString()+"/";
            if (!Directory.Exists(Server.MapPath(filePath)))
            {
                Directory.CreateDirectory(Server.MapPath(filePath));
            }
            string returnPath = filePath + DateTime.Now.ToString("yyyyMMddhhmmssffff") + fileName;
            string absoluteFilePath = Server.MapPath(filePath) + DateTime.Now.ToString("yyyyMMddhhmmssffff") + fileName;
            file.SaveAs(absoluteFilePath);
            return returnPath;

        }