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MVC微信网页授权获取用户OpenId

程序员文章站 2023-10-23 21:58:11
最近开发微信公众平台,做下记录,以前也开发过,这次开发又给忘了,搞了半天,还是做个笔记为好。  注意框架为mvc 开发微信公众平台。场景为,在模板页中获取用...

最近开发微信公众平台,做下记录,以前也开发过,这次开发又给忘了,搞了半天,还是做个笔记为好。 

注意框架为mvc 开发微信公众平台。场景为,在模板页中获取用户openid,想要进行验证的页面,集成模板页就可以了。 

在_layout.cshtml中加入如下代码 

<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>@viewbag.title - my asp.net application</title>
  @styles.render("~/content/css")
  @scripts.render("~/bundles/modernizr")
  @{
    var code = httpcontext.current.request["code"];
    log.logmsg(code);
    string urlpath = httpcontext.current.request.url.absoluteuri.tostring();
    viewbag.at = adminutil.getopenid(urlpath, code);
  }
</head> 

类adminutil中加入getopenid方法 

#region 获取openid
    /// <summary>
    /// 获取openid
    /// </summary>
    public static string getopenid(string redirect_url, string code)
    {
      string appid = wxmodel.appid;
      string appsecret = wxmodel.appsecret;
      string openid = "";
      openid = wxapi.getopenid(appid, redirect_url, code, appsecret);
      return openid;
    }
    #endregion 

类wxapi中加入getopenid方法 

 #region 获取openid
    /// <summary>
    /// 获取openid
    /// </summary>
    public static string getopenid(string appid, string redirect_url, string code, string screct)
    {
      string strjson = "";
      if (string.isnullorempty(code))
      {
        redirect_url = httputility.urlencode(redirect_url);
        httpcontext.current.response.redirect(string.format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&response_type=code&scope=snsapi_base&state={2}#wechat_redirect",
          appid, redirect_url, new random().next(1000, 200000).tostring()));
      }
      else
      {
        strjson = httprequestutil.requesturl(string.format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code",
        appid, screct, code));
      }
      return tools.getjsonvalue(strjson, "openid");
    }
    #endregion
public static class wxmodel
  {
    public static string access_token;
    public static string appid;
    public static string appsecret;
  } 
 /// <summary>
  /// 工具类
  /// </summary>
  public class tools
  {
    #region 获取json字符串某节点的值
    /// <summary>
    /// 获取json字符串某节点的值
    /// </summary>
    public static string getjsonvalue(string jsonstr, string key)
    {
      string result = string.empty;
      if (!string.isnullorempty(jsonstr))
      {
        key = "\"" + key.trim('"') + "\"";
        int index = jsonstr.indexof(key) + key.length + 1;
        if (index > key.length + 1)
        {
          //先截逗号,若是最后一个,截“}”号,取最小值
          int end = jsonstr.indexof(',', index);
          if (end == -1)
          {
            end = jsonstr.indexof('}', index);
          }

          result = jsonstr.substring(index, end - index);
          result = result.trim(new char[] { '"', ' ', '\'' }); //过滤引号或空格
        }
      }
      return result;
    }
    #endregion

  }
public class httprequestutil
  {
    #region 请求url,不发送数据
    /// <summary>
    /// 请求url,不发送数据
    /// </summary>
    public static string requesturl(string url)
    {
      return requesturl(url, "post");
    }
    #endregion

    #region 请求url,不发送数据
    /// <summary>
    /// 请求url,不发送数据
    /// </summary>
    public static string requesturl(string url, string method)
    {
      // 设置参数
      httpwebrequest request = webrequest.create(url) as httpwebrequest;
      cookiecontainer cookiecontainer = new cookiecontainer();
      request.cookiecontainer = cookiecontainer;
      request.allowautoredirect = true;
      request.method = method;
      request.contenttype = "text/html";
      request.headers.add("charset", "utf-8");

      //发送请求并获取相应回应数据
      httpwebresponse response = request.getresponse() as httpwebresponse;
      //直到request.getresponse()程序才开始向目标网页发送post请求
      stream responsestream = response.getresponsestream();
      streamreader sr = new streamreader(responsestream, encoding.default);
      //返回结果网页(html)代码
      string content = sr.readtoend();
      return content;
    }
    #endregion
  } 

注意:需要在微信公众平台中设置授权回调域

MVC微信网页授权获取用户OpenId

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。