最近发现通过小程序接口返回的二维码保存后，却无法打开。
前段时间还可以的，不知道是微信改了什么吗？
请帮忙看看。
下面是代码
public void CreateQrCode(){ var service = new CommonService(); var token = service.GetAccessToken(); var qrcodeContent = Guid.NewGuid().ToString(); var body = $"{{\"path\":\"pages/xxx?q='{qrcodeContent}'\"}}"; var results = HttpPost(url, body); ToImage(results);}public Stream HttpPost(string url, string body){ Encoding encoding = Encoding.UTF8; HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "POST"; //request.ContentType = "application/json; charset=utf-8"; byte[] buffer = encoding.GetBytes(body); request.ContentLength = buffer.Length; var witer = request.GetRequestStream(); witer.Write(buffer, 0, buffer.Length); witer.Close(); HttpWebResponse response = (HttpWebResponse)request.GetResponse(); return response.GetResponseStream();}private static void ToImage(Stream fileSteam){ var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "test2.jpg"); byte[] bytes; using (MemoryStream ms = new MemoryStream()) { fileSteam.CopyTo(ms); bytes = ms.ToArray(); } using (var fs = File.OpenWrite(path)) { fs.Write(bytes, 0, bytes.Length); } Process.Start(path);} |
楼主解决了吗？遇到同样的问题，返回的图片 buffer 存入本地图片文件无法预览：https://developers.weixin.qq.com/miniprogram/dev/OpenApiDoc/qrcode-link/qr-code/getUnlimitedQRCode.html
请具体描述问题，具体是什么表现？报什么错？
然后如果把Stream转成Image对象时，会报参数不正确的错误，说明是图片的内容不正确，导致转换失败。