var time = ‘@ViewBag.Share.timestamp‘;      wx.config({        debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。        appId: ‘@ViewBag.Share.appId‘, // 必填，公众号的唯一标识        timestamp: parseInt(time), // 必填，生成签名的时间戳        nonceStr: ‘@ViewBag.Share.nonceStr‘, // 必填，生成签名的随机串        signature: ‘@ViewBag.Share.signature‘,// 必填，签名，见附录1          jsApiList: ["chooseImage", "previewImage", "uploadImage", "downloadImage"] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2      });        wx.ready(function() {            $(document).on("click", ".ctcon", function() {                wx.chooseImage({                    count: 1, // 默认9                    sizeType: [‘original‘, ‘compressed‘], // 可以指定是原图还是压缩图，默认二者都有                    sourceType: [‘album‘, ‘camera‘], // 可以指定来源是相册还是相机，默认二者都有                    success: function (res) {                        var localIds = res.localIds; // 返回选定照片的本地ID列表，localId可以作为img标签的src属性显示图片                        uploadimg(localIds[0].toString());                    }                });            });

　　　　　　　　　　　　　　　　
            function uploadimg(lid) {                wx.uploadImage({                    localId: lid, // 需要上传的图片的本地ID，由chooseImage接口获得                    isShowProgressTips: 1, // 默认为1，显示进度提示                    success: function (res) {                        var serverId = res.serverId; // 返回图片的服务器端ID                        //alert(serverId);                        $.post("/Question/DownWxImage", { serverId: serverId }, function(res) {                            //alert(res.SaveName);                            if (res.Success === true) {                                 // 显示图片                            }                                                   });                });            }        });

  public ActionResult DownWxImage(string serverId)        {            var token = getToken();             var url = string.Format("http://file.api.weixin.qq.com/cgi-bin/media/get?access_token={0}&media_id={1}",                 token, serverId);//图片下载地址             HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);             req.Method = "GET";             using (WebResponse wr = req.GetResponse())             {                 HttpWebResponse myResponse = (HttpWebResponse)req.GetResponse();                var strpath = myResponse.ResponseUri.ToString();                 WebClient mywebclient = new WebClient();                 var path = "/Content/UploadFiles/mobile/";                 var uploadpath = Server.MapPath(path);                 if (!Directory.Exists(uploadpath))                 {                     Directory.CreateDirectory(uploadpath);                 }                 string saveName = Encrypt.GenerateOrderNumber() + ".jpg";                 var savePath = uploadpath + saveName;                 try                 {                     mywebclient.DownloadFile(strpath, savePath);                     return Json(new { Success = true, SaveName = path + saveName });                 }                 catch (Exception ex)                 {                     savePath = ex.ToString();                 }             }             return Json(new {Success = false, Message = "上传失败！"});        }