.NET C#使用微信公众号登录网站(2)

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; namespace WD.C.Controllers { public class QRController : Controller { // // GET: /QR/ public ActionResult Index() { return View(); } /// <summary> /// 获得2维码图片 /// </summary> /// <param></param> /// <returns></returns> public ActionResult GetQRCodeImg(string str) { using (var ms = new System.IO.MemoryStream()) { string stringtest = str; GetQRCode(stringtest, ms); Response.ContentType = "image/Png"; Response.OutputStream.Write(ms.GetBuffer(), 0, (int)ms.Length); System.Drawing.Bitmap img = new System.Drawing.Bitmap(100, 100); img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); Response.End(); return File(ms.ToArray(), @"image/jpeg"); } } private static bool GetQRCode(string strContent, System.IO.MemoryStream ms) { Gma.QrCodeNet.Encoding.ErrorCorrectionLevel Ecl = Gma.QrCodeNet.Encoding.ErrorCorrectionLevel.M; //误差校正水平 string Content = strContent;//待编码内容 Gma.QrCodeNet.Encoding.Windows.Render.QuietZoneModules QuietZones = Gma.QrCodeNet.Encoding.Windows.Render.QuietZoneModules.Two; //空白区域 int ModuleSize = 12;//大小 var encoder = new Gma.QrCodeNet.Encoding.QrEncoder(Ecl); Gma.QrCodeNet.Encoding.QrCode qr; if (encoder.TryEncode(Content, out qr))//对内容进行编码，并保存生成的矩阵 { var render = new Gma.QrCodeNet.Encoding.Windows.Render.GraphicsRenderer(new Gma.QrCodeNet.Encoding.Windows.Render.FixedModuleSize(ModuleSize, QuietZones)); render.WriteToStream(qr.Matrix, System.Drawing.Imaging.ImageFormat.Png, ms); } else { return false; } return true; } } }

视图 开启SignalR
  var chat = $.connection.pushHub;
        $.connection.hub.start().done(function () {
             chat.server.ruserConnected();
        });

$.connection.pushHub对应

chat.server.ruserConnected();对应

表示调用"pushHub"运行后执行 runserConnected方法，在临时表中增加当前浏览器的ConnectionID

chat.client.getUserId = function (ruserid) { 　　//二维码生成的文本 $("#loga").attr("src", "@ViewBag.Url" + ruserid); }

表示台后数据 
收到数据后返回到游览器

chat.client.userLoginSuccessful = function (r, userid) { if (r) { $.post("/Login/AddSession/", { userid: userid }, function (r2) { if (r2) { location.href = "/Home/"; } }) } };

用户通过微信登录后 

接收微信OpenID  
 $.post("/Login/AddSession/", { userid: userid }, function (r2) {
if (r2) {
location.href = "/Home/";
}
}) 

执行 Post到后台增加登录信息，成功后转到/Home/主页 

/// <summary> /// 保存微信确认登录后返回的OPENID，做为网站的Session["LogUserID"] /// </summary> /// <param></param> /// <returns></returns> public JsonResult AddSession(string userid) { Session["LogUserID"] = userid; return Json(true); }

Login/WxLog.cshtml 本页在微信上打开 

@{ ViewBag.Title = "WxLog"; } <script src="https://www.jb51.net/~/Scripts/jquery.signalR-1.1.4.min.js"></script> <script src="https://www.jb51.net/~/signalr/hubs"></script> <script> $(function () { //连接SignalR pushHab var chat = $.connection.pushHub; //启动 $.connection.hub.start().done(); $("#btnLog").click(function () { //登录,发送信息到服务器 chat.server.logUserConnected("@ViewBag.ruser","@ViewBag.LogUserID"); }); }); </script> <h2>WxLog</h2> <a href="#">登录</a> @{ ViewBag.Title = "Index"; } @Scripts.Render("~/bundles/jquery") <script src="https://www.jb51.net/~/Scripts/jquery.signalR-1.1.4.min.js"></script> <script src="https://www.jb51.net/~/signalr/hubs"></script> <script type='text/javascript'> $(function () { var chat = $.connection.pushHub; $.connection.hub.start().done(function () { chat.server.ruserConnected(); }); chat.client.getUserId = function (ruserid) { $("#loga").attr("src", "@ViewBag.Url" + ruserid); } chat.client.userLoginSuccessful = function (r, userid) { if (r) { location.href = "/Home/"; }) } }; }); </script> <header> <a href="https://www.jb51.net/~/Home/">&#60;</a> <h1>用户登录</h1> </header> <div></div> 请使用微信登录扫描以下二维码生产图片 <div> <img src="#" /> </div>  

GetOpenIDByCode(code)方法

参考