FileUpload上传多张照片

 <asp:FileUpload ID="uploaderInput" runat="server"  multiple="multiple" accept="image/*"/>
            <asp:Button ID="but_imgup" runat="server" Text="照片上传" />
            <asp:Image ID="img_face" runat="server" Width="30" Height="30" />

#region  上传方法
    public bool Upload()
    {
        HttpFileCollection upFiles = Request.Files;
        if (upFiles.Count > 0)
        {
            string wenjianjia = "a_" + DateTime.Now.ToString("yyyy-MM-dd");
            string savePath = "~/img/" + wenjianjia;
            string savePaths = MapPath(savePath);
            if (!Directory.Exists(savePaths))
            {
                Directory.CreateDirectory(savePaths);
            }
            for (int i = 0; i < upFiles.Count; i++)
            {
                string url_a = "a" + DateTime.Now.Ticks.ToString() + i;
                string url_f = "f" + DateTime.Now.Ticks.ToString() + i;

                string extendName = string.Empty;
                HttpPostedFile PostedFile = upFiles[i];
                if (PostedFile.ContentLength > 0)
                {
                    extendName = Path.GetExtension(PostedFile.FileName.ToLower()).Replace(".", "");
                    //保存 原始图
                    url_a = "/" + url_a + "." + extendName;
                    url_f = "/" + url_f + "." + extendName;
                    string url_as = savePaths + url_a;
                    string url_fs = savePaths + url_f;
                    //苹果手机 图片角度 调整
                    string url = savePaths + url_f;
                    PostedFile.SaveAs(url);
                    RemoveRotateFlips(url, url_as);
                    File.Delete(url);
                    //缩略图
                    MakeThumbnail(url_as, url_fs, 350, 350, "H");
                    File.Delete(url_as);
                    //显示 图片
                    img_face.ImageUrl = savePath + url_f;
                }
            }
            return true;
        }
        else
        {
            return false;
        }
    }
    #endregion