public ActionResult MutualHelpAdd(){var jssdkUiPackage = JSSDKHelper.GetJsSdkUiPackage(WeChatParameter._appID, WeChatParameter._appSecret, Request.Url.AbsoluteUri);ViewBag.AppId = WeChatParameter._appID;ViewBag.Timestamp = jssdkUiPackage.Timestamp;ViewBag.NonceStr = jssdkUiPackage.NonceStr;ViewBag.Signature = jssdkUiPackage.Signature;return View();}

  wx.config({//debug: true,appId: '@ViewBag.AppId',timestamp: '@ViewBag.Timestamp',nonceStr: '@ViewBag.NonceStr',signature: '@ViewBag.Signature',jsApiList: ['chooseImage','previewImage','uploadImage','downloadImage']});wx.ready(function () {// 5 图片接口// 5.1 拍照、本地选图var images = {localId: [],serverId: []};document.querySelector('#btnAddImage').onclick = function () {wx.chooseImage({count: 3, // 默认9，设置可以同时上传的图片数量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) {images.localId = res.localIds;//alert('已选择 ' + res.localIds.length + ' 张图片');var i = 0, length = images.localId.length;images.serverId = [];function upload() {wx.uploadImage({localId: images.localId[i],success: function (res) {i++;//alert('已上传：' + i + '/' + length);
                                    images.serverId.push(res.serverId);//TODO: res.serverId 就是 media_id，根据它去微信服务器读取图片数据：自定义上传到自己服务器var imageJson = $("#hdImageJson").val();$.ajax({type: 'post',url: '/Common/AddImage',async: false,data: {media_id: res.serverId,imageJson: imageJson,folderName:"MutualHelp"},success: function (data) {if (data.ImageUrl != '') {// 返回 图片在我们自己的服务器的urlvar img = "<img class='task_image' src='/images/" + data.ImageUrl + "'/>";$("#imgList").append(img);$("#hdImageJson").val(data.ImageJson);}},error: function (err) {}})if (i < length) {upload();}},fail: function (res) {alert(JSON.stringify(res));}});}upload();}});};});

  /// <summary>/// 公用 微信 上传图片方法/// </summary>/// <param name="media_id"></param>/// <param name="imageJson"></param>/// <returns></returns>public JsonResult AddImage(string media_id, string imageJson,string folderName){var imgUrl = "";try{List<ImageList> curImageResult;if (!string.IsNullOrEmpty(imageJson)){curImageResult = JsonConvert.DeserializeObject<List<ImageList>>(imageJson);}else{curImageResult = new List<ImageList>();}var accessToken = AccessTokenContainer.TryGetAccessToken(WeChatParameter._appID, WeChatParameter._appSecret);System.IO.MemoryStream stream = new System.IO.MemoryStream();MediaApi.Get(accessToken, media_id, stream);Image img = Image.FromStream(stream);var imgName = DateTime.Now.ToString("yyyyMMddhhss");var fileSaveUrl =string.Format(FilePath + "/{0}/" + imgName + ".jpg", folderName);imgUrl = string.Format("/{0}/" + imgName + ".jpg", folderName);img.Save(fileSaveUrl);var imageEntity = new ImageList{ImageKey = imgName,ImageUrl = imgUrl,UploadTime = DateTime.Now};curImageResult.Add(imageEntity);imageJson = JsonConvert.SerializeObject(curImageResult);}catch (Exception ex){imgUrl = "";}var result = new{ImageJson = imageJson,ImageUrl = imgUrl};return Json(result);}