怎么在微信公众号使用ASP.net开发自定义菜单

最新推荐文章于 2019-11-05 09:24:52 发布

原创最新推荐文章于 2019-11-05 09:24:52 发布 · 940 阅读

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本文介绍如何通过POST方法创建自定义菜单，并验证消息是否来自微信服务器。文章详细讲解了利用C#进行开发的具体步骤，包括服务器配置填写、微信签名验证、获取访问令牌及构建菜单JSON等关键环节。

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第一步：填写服务器配置

第二步：验证消息的确来自微信服务器

开发者提交信息后，微信服务器将发送GET请求到填写的服务器地址URL上，GET请求携带参数如下表所示：

参数	描述
signature	微信加密签名，signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。
timestamp	时间戳
nonce	随机数
echostr	随机字符串

开发者通过检验signature对请求进行校验（下面有校验方式）。若确认此次GET请求来自微信服务器，请原样返回echostr参数内容，则接入生效，成为开发者成功，否则接入失败。加密/校验流程如下：

1）将token、timestamp、nonce三个参数进行字典序排序

2）将三个参数字符串拼接成一个字符串进行sha1加密

3）开发者获得加密后的字符串可与signature对比，标识该请求来源于微信

这部分要通过开发实现

在后台xx.cs文件里面写

namespace WebApplication4
{
    public partial class WebForm12 : System.Web.UI.Page
    {
        const string AppUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";
        const string postUrl = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=";
        const string postDelUrl = "https://api.weixin.qq.com/cgi-bin/menu/delete?access_token="; //删除菜单的URL
        const string AppID = "wx72d62513adab1163";
        const string AppSecret = "e479a6d6a4cffb7ab20380182ecc16f2";

        protected void Page_Load(object sender, EventArgs e)
        {
            Response.Clear();

//这段代码主要验证有没有跟微信建立通信，通过本地目录创建一个记事本

            //string file = Server.MapPath("test.txt");
            //string content = "asdfsafd111--";
            //if (File.Exists(file) == true)
            //{
            //    FileStream myFs = new FileStream(file, FileMode.Open);
            //    StreamWriter mySw = new StreamWriter(myFs);
            //    mySw.Write(content); mySw.Close(); myFs.Close();
            //}
            //else
            //{
            //    FileStream myFs = new FileStream(file, FileMode.Create);
            //    StreamWriter mySw = new StreamWriter(myFs);
            //    mySw.Write(content); mySw.Close(); myFs.Close();
            //}

   //如果是get直接执行Valid()函数

              Valid();


        }

// <summary>

        // 验证微信签名

        // </summary>

        // * 将token、timestamp、nonce三个参数进行字典序排序

        // * 将三个参数字符串拼接成一个字符串进行sha1加密

        // * 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信。

        // <returns></returns>

        private void Valid()
        {


            string echoStr = HttpContext.Current.Request.QueryString["echoStr"].ToString();

            if (CheckSignature())
            {

                if (!string.IsNullOrEmpty(echoStr))
                {


                    Response.Write(echoStr);

                    Response.End();

                }

            }

        }

        private bool CheckSignature()
        {

            string signature = HttpContext.Current.Request.QueryString["signature"].ToString();

            string timestamp = HttpContext.Current.Request.QueryString["timestamp"].ToString();

            string nonce = HttpContext.Current.Request.QueryString["nonce"].ToString();

            string Token = "xxxxxx";//你的token 非常重要
            string[] ArrTmp = { Token, timestamp, nonce };

            Array.Sort(ArrTmp);     //字典排序

            string tmpStr = string.Join("", ArrTmp);

            tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");

            tmpStr = tmpStr.ToLower();

            if (tmpStr == signature)
            {
                return true;
            }
            else
            {
                return false;
            }

        }

}

}

第三步：通过POST方法创建自定义菜单

在xx.aspx中添加按钮,通过这个按钮响应的post

<asp:Button ID="postWeixin" runat="server"
CssClass="logincn" onclick="postWeixin_Click" ></asp:Button>&

在后台xx.cs贴出完整代码

using System;

using System.Collections.Generic;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data;

using System.IO;

using System.Net;

using System.Text;

using System.Xml;

using System.Web.Security;

namespace WebApplication4
{
    public partial class WebForm12 : System.Web.UI.Page
    {
        const string AppUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";
        const string postUrl = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=";
        const string postDelUrl = "https://api.weixin.qq.com/cgi-bin/menu/delete?access_token="; //删除菜单的URL
        const string AppID = "wx72d62513adab1163";
        const string AppSecret = "e479a6d6a4cffb7ab20380182ecc16f2";

        protected void Page_Load(object sender, EventArgs e)
        {
            Response.Clear();

        }

protected void postWeixin_Click(object sender, EventArgs e)
        {
            string menuJson = GetWXMenuStr();

            PostMenuData(postUrl + GetAccessToken(), menuJson);
            Response.Write("<script language=javascript>alert('创建成功！')</script>");

        }
        private static string GetAccessToken()
        {
            WebClient webClient = new WebClient();
            Byte[] bytes = webClient.DownloadData(string.Format("{0}&appid={1}&secret={2}", AppUrl, AppID, AppSecret));
            string result = Encoding.GetEncoding("utf-8").GetString(bytes);

            //JObject jObj = JObject.Parse(result);
            //JToken token = jObj["access_token"];
            //return token.ToString().Substring(1, token.ToString().Length - 2);

            string[] temp = result.Split(',');
            string[] tp = temp[0].Split(':');
            return tp[1].ToString().Replace('"', ' ').Trim().ToString();

        }

        private string GetWXMenuStr()
        {

            string weixin1 = "";
            weixin1 += "{\n";
            weixin1 += "\"button\":[\n";
            weixin1 += "{\n";
            // weixin1 += "\"type\":\"click\",\n";
            //第一个菜单
            weixin1 += "\"name\":\"公共信息\",\n";
            weixin1 += "\"sub_button\":[\n";

            weixin1 += "{\n";
            weixin1 += "\"type\":\"click\",\n";
            weixin1 += "\"name\":\"通知公告\",\n";
            weixin1 += "\"key\":\"15\"\n";
            weixin1 += "}]\n";
            weixin1 += "},\n";

            //第二个菜单(view类型的)
            weixin1 += "{\n";
            weixin1 += "\"name\":\"互动交流\",\n";
            weixin1 += "\"sub_button\":[\n";
            weixin1 += "{\n";
            weixin1 += "\"type\":\"view\",\n";
            weixin1 += "\"name\":\"菜单描述\",\n";
            weixin1 += "\"url\":\"http://www.xxxx.xxxx.cn/xxxxxxlogin.aspx\"\n";
            weixin1 += "},\n";

            weixin1 += "{\n";
            weixin1 += "\"type\":\"view\",\n";
            weixin1 += "\"name\":\"官网\",\n";
            weixin1 += "\"url\":\"http://www.xxxxx.com.cn\"\n";
            weixin1 += "}]\n";
            weixin1 += "}\n";
            weixin1 += "}]\n";

            weixin1 += "}\n";
            return weixin1;
        }
        private void PostMenuData(string url, string postData)
        {
            Stream outstream = null;
            Stream instream = null;
            StreamReader sr = null;
            HttpWebResponse response = null;
            HttpWebRequest request = null;
            Encoding encoding = Encoding.UTF8;
            byte[] data = encoding.GetBytes(postData);
            // 准备请求...
            try
            {
                // 设置参数
                request = WebRequest.Create(url) as HttpWebRequest;
                CookieContainer cookieContainer = new CookieContainer();
                request.CookieContainer = cookieContainer;
                request.AllowAutoRedirect = true;
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = data.Length;
                outstream = request.GetRequestStream();
                outstream.Write(data, 0, data.Length);
                outstream.Close();
                //发送请求并获取相应回应数据
                response = request.GetResponse() as HttpWebResponse;
                //直到request.GetResponse()程序才开始向目标网页发送Post请求
                instream = response.GetResponseStream();
                sr = new StreamReader(instream, encoding);
                //返回结果网页（html）代码
                string content = sr.ReadToEnd();
                string err = string.Empty;
                // return content;
            }
            catch (Exception ex)
            {
                string err = ex.Message;
                //return string.Empty;
            }
        }

    }

}