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.NET WeChat public account obtains OpenID and user information instance analysis

高洛峰Original: 2017-03-31 15:33:334071browse

This article mainly introduces in detail the method of obtaining OpenID and user information for .NET WeChat public account. User OpenID is particularly important for the development of WeChat public platform. Interested friends can refer to it

The example in this article shares with you the method of obtaining the user's OpenID on the WeChat public platform for your reference. The specific content is as follows

Index.aspx.cs code:

 public partial class Index : System.Web.UI.Page
 {

  //用户id
  public string openid = "";

  //公众号信息部分
  public string appid = ConfigurationManager.AppSettings["AppId"];
  public string appsecret = ConfigurationManager.AppSettings["AppSecret"];
  public string redirect_uri =HttpUtility.UrlEncode("http://www.jb51.net");
  public string scope = "【删除这个并填入请求类型，例如：snsapi_userinfo】";

  #region 显示页面
  public string accesstoken;
  public string nickname;
  public string sex;
  public string headimgurl;
  public string province;
  public string country;
  public string language;
  public string city;

  public string privilege = "";
  #endregion

  protected void Page_Load(object sender, EventArgs e)
  {

   /*
   *微信认证获取openid部分：
   *临时认证code
   */
   //微信认证部分：第二步 获得code
   string code = Request["code"];
   if (string.IsNullOrEmpty(code))
   {
    //如果code没获取成功，重新拉取一遍
    OpenAccess();
   }
   //微信认证部分：第三步 获得openid
   string url = string.Format("https://api.weixin.qq.com/sns/oauth2/access_token?appid={0}&secret={1}&code={2}&grant_type=authorization_code", appid, appsecret, code);
   string result = HttpClientHelper.GetResponse(url);
   LogHelper.WriteFile(result);
   JObject outputObj = JObject.Parse(result);

   //微信认证部分：第四步 获得更多信息
   accesstoken = outputObj["access_token"].ToString();
   openid = outputObj["openid"].ToString();
   url = string.Format("https://api.weixin.qq.com/sns/userinfo?access_token={0}&openid={1}&lang=zh_CN",accesstoken,openid);
   string result1 = HttpClientHelper.GetResponse(url);
   LogHelper.WriteFile(result1);
   JObject outputObj1 = JObject.Parse(result1);//将json转为数组
   //以下是第四步获得的信息：  
    nickname = outputObj1["nickname"].ToString(); //昵称
    sex = outputObj1["sex"].ToString(); //性别什么的
    headimgurl = outputObj1["headimgurl"].ToString(); //头像url
    province = outputObj1["province"].ToString(); ;
    country = outputObj1["country"].ToString(); ;
    language = outputObj1["language"].ToString(); ;
    city = outputObj1["city"].ToString(); ;
   //将获得的用户信息填入到session中
   Session["openid"] = outputObj1["openid"];
   //转向回入口
   //OpenAccess();
  }

  /*
   * 接入入口
   * 开放到微信菜单中调用
   * @param $dir_url 来源url
   * @since 1.0
   * @return void
   */
  public void OpenAccess()
  {
   //判断session不存在
   if (Session["openid"] == null)
   {
    //认证第一步：重定向跳转至认证网址
    string url = string.Format("https://open.weixin.qq.com/connect/oauth2/authorize?appid={0}&redirect_uri={1}&&response_type=code&scope=snsapi_userinfo&m=oauth2#wechat_redirect", appid, redirect_uri);
    Response.Redirect(url);
   }
   //判断session存在
   else
   {
    //跳转到前端页面.aspx
    Response.Redirect(Request.Url.ToString());
   }
  }

 }

Index.aspx content:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Index.aspx.cs" Inherits="TEST.Index" %>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
 <title></title>
 <meta name="viewport" content="width=device-width, initial-scale=1" />
 <style type="text/css">
  td
  {
   word-wrap: break-word;
  }
 </style>
 <script type="text/javascript">

 </script>
</head>
<body>
 <form id="form1" runat="server">
 <p id="wu" runat="server">
  <table style="width: 100%;">
   <tr>
    <td style="width: 150px;">
     <p>
      openid:<%=openid%></p>
    </td>
    <td>
     <p>
      nickname:<%=nickname%></p>
    </td>
    <td>
     <p>
      sex:<%=sex%></p>
    </td>
   </tr>
   <tr>
    <td>
     <p>
      language:<%=language%></p>
    </td>
    <td>
     <p>
      city:<%=city%></p>
    </td>
    <td>
     <p>
      country:<%=country%></p>
    </td>
   </tr>
   <tr>
    <td>
     <p>
      headimgurl:<img     style="max-width:90%" src="<%=headimgurl % alt=".NET WeChat public account obtains OpenID and user information instance analysis" >" alt=""></p>
    </td>
    <td>
     <p>
      privilege:<%=privilege%></p>
    </td>
    <td>
    </td>
   </tr>
  </table>
 </p>
 </form>
</body>
</html>

HttpClientHelper.cs code:

public class HttpClientHelper
 {
  /// <summary>
  ///  get请求
  /// </summary>
  /// <param name="url"></param>
  /// <returns></returns>
  public static string GetResponse(string url)
  {
   if (url.StartsWith("https"))
   {
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
   }

   var httpClient = new HttpClient();
   httpClient.DefaultRequestHeaders.Accept.Add( new MediaTypeWithQualityHeaderValue("application/json"));

   HttpResponseMessage response = httpClient.GetAsync(url).Result;

   if (response.IsSuccessStatusCode)
   {
    string result = response.Content.ReadAsStringAsync().Result;
    return result;
   }
   return null;
  }

  public static T GetResponse<T>(string url)
   where T : class, new()
  {
   if (url.StartsWith("https"))
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;

   var httpClient = new HttpClient();
   httpClient.DefaultRequestHeaders.Accept.Add(
    new MediaTypeWithQualityHeaderValue("application/json"));
   HttpResponseMessage response = httpClient.GetAsync(url).Result;

   T result = default(T);

   if (response.IsSuccessStatusCode)
   {
    Task<string> t = response.Content.ReadAsStringAsync();
    string s = t.Result;

    result = JsonConvert.DeserializeObject<T>(s);
   }
   return result;
  }

  /// <summary>
  ///  post请求
  /// </summary>
  /// <param name="url"></param>
  /// <param name="postData">post数据</param>
  /// <returns></returns>
  public static string PostResponse(string url, string postData)
  {
   if (url.StartsWith("https"))
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;

   HttpContent httpContent = new StringContent(postData);
   httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
   var httpClient = new HttpClient();

   HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;

   if (response.IsSuccessStatusCode)
   {
    string result = response.Content.ReadAsStringAsync().Result;
    return result;
   }
   return null;
  }

  /// <summary>
  ///  发起post请求
  /// </summary>
  /// <typeparam name="T"></typeparam>
  /// <param name="url">url</param>
  /// <param name="postData">post数据</param>
  /// <returns></returns>
  public static T PostResponse<T>(string url, string postData)
   where T : class, new()
  {
   if (url.StartsWith("https"))
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;

   HttpContent httpContent = new StringContent(postData);
   httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
   var httpClient = new HttpClient();

   T result = default(T);

   HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;

   if (response.IsSuccessStatusCode)
   {
    Task<string> t = response.Content.ReadAsStringAsync();
    string s = t.Result;

    result = JsonConvert.DeserializeObject<T>(s);
   }
   return result;
  }

  /// <summary>
  ///  V3接口全部为Xml形式，故有此方法
  /// </summary>
  /// <typeparam name="T"></typeparam>
  /// <param name="url"></param>
  /// <param name="xmlString"></param>
  /// <returns></returns>
  public static T PostXmlResponse<T>(string url, string xmlString)
   where T : class, new()
  {
   if (url.StartsWith("https"))
    ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;

   HttpContent httpContent = new StringContent(xmlString);
   httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
   var httpClient = new HttpClient();

   T result = default(T);

   HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;

   if (response.IsSuccessStatusCode)
   {
    Task<string> t = response.Content.ReadAsStringAsync();
    string s = t.Result;

    result = XmlDeserialize<T>(s);
   }
   return result;
  }

  /// <summary>
  ///  反序列化Xml
  /// </summary>
  /// <typeparam name="T"></typeparam>
  /// <param name="xmlString"></param>
  /// <returns></returns>
  public static T XmlDeserialize<T>(string xmlString)
   where T : class, new()
  {
   try
   {
    var ser = new XmlSerializer(typeof (T));
    using (var reader = new StringReader(xmlString))
    {
     return (T) ser.Deserialize(reader);
    }
   }
   catch (Exception ex)
   {
    throw new Exception("XmlDeserialize发生异常：xmlString:" + xmlString + "异常信息：" + ex.Message);
   }
  }
 }

The result is as shown:

.NET WeChat public account obtains OpenID and user information instance analysis

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.NET WeChat public account obtains OpenID and user information instance analysis

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