C#实现的微信网页授权操作逻辑封装示例

string appid = "wx145b4a8fd07b24e8";
string appsecrect = "fe6951dcb99772411c42f724b1336065";
string redirect_url = "配置域名下的回调地址";
OAuthManage _oauth = null;
/// <summary>
///控制器构造函数
/// </summary>
public UserController()
{
  _oauth = new OAuthManage(appid, appsecrect, redirect_url);
}
/// <summary>
/// 授权登录
/// </summary>
/// <returns></returns>
public ActionResult AuthLogin()
{
  ViewBag.url = _oauth.GetCodeUrl();
  return View();
}
/// <summary>
/// 回调处理
/// </summary>
/// <returns></returns>
public ActionResult OAuthHandle()
{
  string result = "";
  //注册事件处理
  _oauth.OnError = (e) =>
  {
    string msg = "";
    Exception inner = e;
    while (inner != null)
    {
      msg += inner.Message;
      inner = inner.InnerException;
    }
    result = msg;
    LogOperate.Write(msg);
  };
  _oauth.OnGetTokenSuccess = (token) =>
  {
    result += "<br/>";
    result += token.ToJsonString();
  };
  _oauth.OnGetUserInfoSuccess = (user) =>
  {
    result += "<br/>";
    result += user.ToJsonString();
  };
  //第二步
  _oauth.GetAccess_Token();
  //第三步
  _oauth.GetUserInfo();
  //显示结果
  ViewBag.msg = result;
  return View();
}

namespace WXPackage
{
  /// <summary>
  /// 网页授权逻辑处理，
  /// 处理三步操作，处理成功，返回用户基本信息
  /// </summary>
  public class OAuthManage
  {
    #region 基本信息定义
    /// <summary>
    /// 公众号的唯一标识
    /// </summary>
    private string appid;
    /// <summary>
    /// 公众号的appsecret
    /// </summary>
    private string secret;
    /// <summary>
    /// 回调url地址
    /// </summary>
    private string redirect_uri;
    /// <summary>
    /// 获取微信用户基本信息使用snsapi_userinfo模式
    /// 如果使用静默授权，无法获取用户基本信息但可以获取到openid
    /// </summary>
    private string scope;
    public OAuthManage(string appid, string appsecret, string redirect_uri, bool IsUserInfo = true)
    {
      this.appid = appid;
      this.secret = appsecret;
      this.redirect_uri = redirect_uri;
      this.scope = IsUserInfo ? "snsapi_userinfo" : "snsapi_base";
    }
    #endregion
    #region 请求过程信息
    /// <summary>
    /// 第一步获取到的Code 值
    /// </summary>
    public string Code { get; set; }
    /// <summary>
    /// 第二步获取到的access_token及相关数据
    /// </summary>
    public OAuthAccess_Token TokenData = null;
    #endregion
    #region 事件定义
    /// <summary>
    /// 当处理出现异常时，触发
    /// </summary>
    public Action<Exception> OnError = null;
    /// <summary>
    /// 当获取AccessToken成功是触发
    /// </summary>
    public Action<OAuthAccess_Token> OnGetTokenSuccess = null;
    /// <summary>
    /// 当获取用户信息成功时触发
    /// </summary>
    public Action<OAuthUser> OnGetUserInfoSuccess = null;
    #endregion
    #region 第二步,回调处理
    /// <summary>
    /// 第二步，通过code换取网页授权access_token
    /// </summary>
    public void GetAccess_Token()
    {
      try
      {
        //1.处理跳转
        this.Code = ReqHelper.GetString("code");
        if (string.IsNullOrEmpty(this.Code))
          throw new Exception("获取code参数失败或用户禁止授权获取基本信息");
        //1.发送获取access_token请求
        string url = GetAccess_TokenUrl();
        string result = NetHelper.Get(url);
        //2.解析相应结果
        TokenData = JsonConvert.DeserializeObject<OAuthAccess_Token>(result);
        if (TokenData == null)
          throw new Exception("反序列化结果失败，返回内容为：" + result);
        //3.获取成功
        if (OnGetTokenSuccess != null)
          OnGetTokenSuccess(TokenData);
      }
      catch (Exception ex)
      {
        Error("第二步，通过code换取网页授权access_token异常", ex);
      }
    }
    /// <summary>
    /// 刷新当前access_token
    /// </summary>
    public OAuthAccess_Token RefreshAccess_Token()
    {
      try
      {
        //1.发送请求
        string url = GetReferesh_TokenUrl();
        string result = NetHelper.Get(url);
        //2.解析结果
        OAuthAccess_Token token = JsonConvert.DeserializeObject<OAuthAccess_Token>(result);
        if (token == null)
          throw new Exception("反序列化结果失败，返回内容：" + result);
        return token;
      }
      catch (Exception ex)
      {
        Error("刷新当前access_token失败", ex);
        return null;
      }
    }
    #endregion
    #region 第三步，获取用户基本信息
    /// <summary>
    /// 第三步，获取基本信息
    /// </summary>
    public void GetUserInfo()
    {
      try
      {
        //1.发送get请求
        string url = GetUserInfoUrl();
        string result = NetHelper.Get(url);
        //2.解析结果
        OAuthUser user = JsonConvert.DeserializeObject<OAuthUser>(result);
        if (user == null)
          throw new Exception("反序列化结果失败，返回内容：" + result);
        //3.获取成功
        if (OnGetUserInfoSuccess != null)
          OnGetUserInfoSuccess(user);
      }
      catch (Exception ex)
      {
        Error("第三步、获取用户基本信息异常", ex);
      }
    }
    #endregion
    #region 静态方法
    /// <summary>
    /// 验证授权凭证是否有效
    /// </summary>
    /// <param name="access_token">access_token</param>
    /// <param name="openid">用户针对当前公众号的openid</param>
    /// <returns></returns>
    public static bool CheckWebAccess_Token(string access_token, string openid)
    {
      try
      {
        string url = string.Format("https://api.weixin.qq.com/sns/auth?access_token={0}&openid={1}",
       access_token,
       openid);
        string result = NetHelper.Get(url);
        JObject obj = JObject.Parse(result);
        int errcode = (int)obj["errcode"];
        return errcode == 0;
      }
      catch (Exception ex)
      {
        throw new Exception("，" + ex.Message);
      }
    }
    #endregion
    #region 获取请求连接
    /// <summary>
    /// 获取Code的url 地址
    /// </summary>
    /// <returns></returns>
    public string GetCodeUrl()
    {
      string url = string.Format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&response_type=code&scope={2}&state=STATE#wechat_redirect",
        this.appid,
        SecurityHelper.UrlEncode(this.redirect_uri),
        this.scope);
      return url;
    }
    /// <summary>
    /// 获取access_token的url地址
    /// </summary>
    /// <returns></returns>
    private string GetAccess_TokenUrl()
    {
      string url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code",
        this.appid,
        this.secret,
        this.Code);
      return url;
    }
    /// <summary>
    /// 获取刷新AccessToke的地址
    /// </summary>
    /// <returns></returns>
    private string GetReferesh_TokenUrl()
    {
      string url = string.Format("https://api.weixin.qq.com/sns/oauth2/refresh_token?appid={0}&grant_type=refresh_token&refresh_token={1}",
        this.appid,
        this.TokenData.refresh_token
        );
      return url;
    }
    /// <summary>
    /// 获取用户基本信息地址
    /// </summary>
    /// <returns></returns>
    private string GetUserInfoUrl()
    {
      string url = string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN",
        this.TokenData.access_token,
        this.TokenData.openid);
      return url;
    }
    #endregion
    private void Error(string msg, Exception inner)
    {
      if (this.OnError != null)
      {
        this.OnError(new Exception(msg, inner));
      }
    }
  }
  /// <summary>
  /// 授权之后获取用户基本信息
  /// </summary>
  public class OAuthUser
  {
    public string openid { get; set; }
    public string nickname { get; set; }
    public int sex { get; set; }
    public string province { get; set; }
    public string city { get; set; }
    public string country { get; set; }
    public string headimgurl { get; set; }
    /// <summary>
    /// 用户特权信息，json 数组
    /// </summary>
    public JArray privilege { get; set; }
    public string unionid { get; set; }
  }
  /// <summary>
  /// 获取Access_Token或者刷新返回的数据对象
  /// </summary>
  public class OAuthAccess_Token
  {
    public string access_token { get; set; }
    public int expires_in { get; set; }
    public string refresh_token { get; set; }
    /// <summary>
    /// 用户针对当前公众号的唯一标识
    /// 关注后会产生，返回公众号下页面也会产生
    /// </summary>
    public string openid { get; set; }
    public string scope { get; set; }
    /// <summary>
    /// 当前用户的unionid，只有在用户将公众号绑定到微信开放平台帐号后
    /// </summary>
    public string unionid { get; set; }
  }
}