标签：ons reg count ring read web dai value 今天
原文:C#获取微信二维码显示到wpf微信的api开放的二维码是一个链接地址，而我们要将这个二维码显示到客户端。方式很多，今天我们讲其中一种。
/// <summary> /// 获取图片路径 /// </summary> /// <param name="httpUrl"></param> /// <returns></returns> public string GetImageUrl(string httpUrl) { HttpWebRequest req = (HttpWebRequest)WebRequest.Create(httpUrl); req.ServicePoint.Expect100Continue = false; req.Method = "GET"; req.KeepAlive = true; req.ContentType = "image/png"; HttpWebResponse rsp = (HttpWebResponse)req.GetResponse(); StreamReader reader = new StreamReader(rsp.GetResponseStream(), Encoding.GetEncoding("utf-8")); string str = reader.ReadToEnd(); string[] imgStr = GetHtmlImageUrlList(str); string strer = "https://open.weixin.qq.com" + imgStr[0]; return strer; } /// <summary> /// 获取img标签 /// </summary> /// <param name="sHtmlText"></param> /// <returns></returns> public string[] GetHtmlImageUrlList(string sHtmlText) { Regex regImg = new Regex(@"<img\b[^<>]*?\bsrc[\s\t\r\n]*=[\s\t\r\n]*[""‘]?[\s\t\r\n]*(?<imgUrl>[^\s\t\r\n""‘<>]*)[^<>]*?/?[\s\t\r\n]*>", RegexOptions.IgnoreCase); MatchCollection matches = regImg.Matches(sHtmlText); int i = 0; string[] sUrlList = new string[matches.Count]; foreach (Match match in matches) sUrlList[i++] = match.Groups["imgUrl"].Value; return sUrlList; }
调用方式：
string imgUrl= GetImageUrl("https://open.weixin.qq.com/......微信地址"); img.Source = new BitmapImage(new Uri(imgUrl));
这个是访问微信地址url，获取到这个url中显示的微信二维码，拿到这个图片，显示到wpf
更多方式了解请加页面下方的群
标签：ons reg count ring read web dai value 今天
原文地址：https://www.cnblogs.com/lonelyxmas/p/10208006.html
