微信认证登陆代码（c#）

using System;using System.Collections.Generic;using System.Linq;using System.Web;using Newtonsoft.Json;/// <summary>/// WeiXin 的摘要说明/// </summary>public abstract class WeiXinPage : System.Web.UI.Page, System.Web.SessionState.IRequiresSessionState{ protected sealed override void OnPreInit(EventArgs e) { if (isGuest) { getWxUser(); } base.OnPreInit(e); } /// <summary> /// 是否访客身份 true:是 false:否 /// </summary> public static bool isGuest { get { return HttpContext.Current.Session[_user] == null ? true : false; } } private static string _user { get { return "$wxuser"; } } private static string _code { get { return "$wxcode"; } } private static string _AbsoluteUri { get { return HttpContext.Current.Request.Url.AbsoluteUri; } } /// <summary> /// 该路径剔除微信Query的URL用于页面重定向获取最新的用户信息 /// </summary> private static string _RawUrl { get { string url = HttpContext.Current.Request.Url.AbsoluteUri; url = url.Replace(url.Substring(url.IndexOf("code"), url.IndexOf("STATE") 5 - url.IndexOf("code")), ""); return url; } } /// <summary> /// 获取微信用户信息 /// </summary> private static Dictionary<string, object> getWxUser() { string code = HttpContext.Current.Request.QueryString.Get("code") ?? "", url = "", ret = ""; try { object user = HttpContext.Current.Session[_user]; if (code.Length == 0 && user == null) { JumpUrl(); return null; } if (user != null) return JsonConvert.DeserializeObject<Dictionary<string, object>>(HttpContext.Current.Session[_user].ToString()); #region /*如果session中不存在user信息则对接微信接口获取用户信息*/ /* 根据code获取access_token */ url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code" , Config.AppId , Config.AppSecret , code); ret = HttpService.Get(url); Dictionary<string, string> o = JsonConvert.DeserializeObject<Dictionary<string, string>>(ret); #region 注意处理微错误{"errcode":40163, "errmsg":"code been used"} 以及{"errcode":40029, "errmsg":"invalid code"} if (o.ContainsKey("errmsg")) { if (o["errcode"] == "40163" || o["errcode"] == "40029") { HttpContext.Current.Response.Redirect(_RawUrl, false); return null; } throw new Exception(o["errmsg"]); } #endregion /* 根据access_token和openid获取用户信息 */ url = string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN" , o["access_token"] , o["openid"]); ret = HttpService.Get(url); /*保存用户到Session*/ HttpContext.Current.Session[_user] = ret; #endregion return JsonConvert.DeserializeObject<Dictionary<string, object>>(HttpContext.Current.Session[_user].ToString()); } catch { throw; } } /// <summary> /// 跳转至微信授权登录页 /// </summary> private static void JumpUrl() { string url = string.Format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect" , Config.AppId , _AbsoluteUri); HttpContext.Current.Response.Redirect(url, false); } /// <summary> /// 微信用户信息 /// </summary> public Dictionary<string, object> Data { get { return getWxUser(); } }}