. Net mvc uses Senparc. Weixin to upload images,

. Net mvc uses Senparc. Weixin to upload images,

First, obtain the signature. Controller code:

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 ();}View Code

View code:

Wx. config ({// debug: true, appId: '@ ViewBag. appId ', timestamp:' @ ViewBag. timestamp ', nonceStr:' @ ViewBag. nonceStr ', signature:' @ ViewBag. signature ', jsApiList: ['chooseimag', 'previewimag', 'uploadimag', 'downloadimage']}); wx. ready (function () {// 5 image interface // 5.1 Image taking, Local Image Selection var images = {localId: [], serverId: []}; document. querySelector ('# btnaddimage '). onclick = function () {wx. chooseImage ({ Count: 3, // The default value is 9. Set the number of images that can be uploaded simultaneously. sizeType: ['original', 'computed']. // you can specify the source image or compressed image, both have sourceType by default: ['alipay', 'camera '], // you can specify whether the source is an album or a camera. By default, both have success: function (res) {images. localId = res. localIds; // alert ('selected' + res. localIds. length + 'image'); var I = 0, length = images. localId. length; images. serverId = []; function upload () {wx. uploadImage ({localId: images. localId [I], success: functi On (res) {I ++; // alert ('uploaded: '+ I +'/'+ length); images. serverId. push (res. serverId); // TODO: res. serverId is media_id, which reads image data from the server: Custom upload to your server 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! = '') {// Return the image in the url var img =" How to save images to a local server:

/// <Summary> /// Public Image Upload method /// </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 );}View Code