生成的小程序二维码图片无法打开？ - WXOPEN Club

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 url = $"https://api.weixin.qq.com/cgi-bin/wxaapp/createwxaqrcode?access_token={token}";

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);

}