微信公众号分享

<script type="text/javascript" src="https://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<a href="javascript:wx_share()">分享</a>

$(function () {
    $.ajax({
        type: "get",
        url: "后台路径",
        data: { url: location.href },
        dataType: "json",
        success: function (data) {
            wx.config({
                debug: false,
                appId: data.appId,
                timestamp: data.timestamp,
                nonceStr: data.nonceStr,
                signature: data.signature,
                jsApiList: [
                       "onMenuShareTimeline", //分享到朋友圈
                       "onMenuShareAppMessage", //分享给好友
                       "onMenuShareQQ",  //分享到QQ
                ]
            });
        },
        error: function (data) {
            //alert("连接失败！");
        }
    });
});

function wx_share() {
        var sharehtml = "";//给予一个蒙城使用户只能点击微信右上角按钮
        $("body").append(sharehtml);
    
}

var title, desc, img;

title = "";
desc = "";
img = "";

var shareData = {
    title: title,//分享内容的标题
    desc: desc,//这里请特别注意是要去除html
    link: window.location.href, //分享页的地址
    imgUrl: img //分享中带有的图片
};

wx.ready(function () {
    wx.onMenuShareAppMessage(shareData);//分享给好友
    wx.onMenuShareTimeline(shareData);//分享到朋友圈
    wx.onMenuShareQQ(shareData);//分享到QQ
});

string url = Request.QueryString["url"];
            var sign = GetSignPackage(url);//获取发送微信服务端的json数组字符串
            var json =   Common.NewJsonHelper.ObjectToJson<System.Collections.Hashtable>(sign);//就是将json字符串序列化一个json数组，每个公司用的不同，这个自己修改
            Response.write(json);

 //得到数据包，返回使用页面  
    public static System.Collections.Hashtable GetSignPackage(string url)
    {
        string jsapiTicket = getJsApiTicket();
        string timestamp = Convert.ToString(ConvertDateTimeInt(DateTime.Now));
        string nonceStr = createNonceStr();


        // 这里参数的顺序要按照 key 值 ASCII 码升序排序  
        string rawstring = "jsapi_ticket=" + jsapiTicket + "&noncestr=" + nonceStr + "&timestamp=" + timestamp + "&url=" + url + "";

        //得到签名
        string signature = SHA1_Hash(rawstring);


        System.Collections.Hashtable signPackage = new System.Collections.Hashtable();
        signPackage.Add("appId", "公众号appID");
        signPackage.Add("nonceStr", nonceStr);
        signPackage.Add("timestamp", timestamp);
        signPackage.Add("url", url);
        signPackage.Add("signature", signature);
        signPackage.Add("rawString", rawstring);


        return signPackage;
    }


    //创建随机字符串  
    private static string createNonceStr()
    {
        int length = 16;
        string chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        string str = "";
        Random rad = new Random();
        for (int i = 0; i < length; i++)
        {
            str += chars.Substring(rad.Next(0, chars.Length - 1), 1);
        }
        return str;
    }


    //得到ticket 如果文件里时间 超时则重新获取  
    static string getJsApiTicket()
    {
        //这里我从数据库读取
        
        string jticket = "";
        string accessToken = getAccessToken();//获取系统的全局token 
        

        string path = HttpContext.Current.Server.MapPath(@"/weixin/jsapi_ticket.json");//网上的都是写缓存，这个地方我是写一个全局json文件，最后会有说的
        string url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=" + accessToken;
       

        StreamReader sr = new StreamReader(path);
        string content = sr.ReadToEnd();
        sr.Close();

        JSTicket api = new JSTicket();
        //未获取jsapi_ticket的情况
        if (content.Length == 0)
        {
            Jsapi iden = JsonHelper.Deserialize<Jsapi>(RequestUrl(url, "get"));

            jticket = iden.ticket;
            if (jticket != "")
            {
                api.expire_time = ConvertDateTimeInt(DateTime.Now) + 7000;
                api.jsapi_ticket = jticket;

                string json = JsonHelper.GetJson<JSTicket>(api);
                StreamWriterMetod(json, path);
            }
        }
        else
        {
            var serializer = new DataContractJsonSerializer(typeof(JSTicket));
            api = JsonHelper.Deserialize<JSTicket>(content);
            //时间过期重新获取
            if (api.expire_time < ConvertDateTimeInt(DateTime.Now))
            {
                Jsapi iden = JsonHelper.Deserialize<Jsapi>(RequestUrl(url, "get"));

                jticket = iden.ticket;
                if (jticket != "")
                {
                    api.expire_time = ConvertDateTimeInt(DateTime.Now) + 7000;
                    api.jsapi_ticket = jticket;

                    string json = JsonHelper.GetJson<JSTicket>(api);
                    StreamWriterMetod(json, path);
                }
            }
            else
            {
                jticket = api.jsapi_ticket;
            }
        }
        return jticket;
    }



    ////得到accesstoken 如果文件里时间 超时则重新获取  
    public static string getAccessToken()
    {
        // access_token 应该全局存储与更新，以下代码以写入到文件中做示例
        string access_token = "";
        string path = HttpContext.Current.Server.MapPath(@"/weixin/access_token.json");//我写的文件里面的，也可以自己写缓存
        string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=123&secret=23";//appID自己修改,secret自己修改
        
        StreamReader sr = new StreamReader(path);
        string content = sr.ReadToEnd();
        sr.Close();

        AccToken readJSTicket = new AccToken();
        if (content.Length == 0)
        {
            AccToken iden = JsonHelper.Deserialize<AccToken>(RequestUrl(url, "get"));

            access_token = iden.access_token;
            if (access_token != "")
            {
                iden.expires_in = ConvertDateTimeInt(DateTime.Now) + 7000;
                iden.access_token = access_token;

                string json = JsonHelper.GetJson<AccToken>(iden);
                StreamWriterMetod(json, path);
            }
        }
        else
        {
            var serializer = new DataContractJsonSerializer(typeof(AccToken));
            readJSTicket = JsonHelper.Deserialize<AccToken>(content);
            if (readJSTicket.expires_in < ConvertDateTimeInt(DateTime.Now))
            {
                AccToken iden = JsonHelper.Deserialize<AccToken>(RequestUrl(url,"get"));

                access_token = iden.access_token;
                if (access_token != "")
                {
                    iden.expires_in = ConvertDateTimeInt(DateTime.Now) + 7000;
                    iden.access_token = access_token;

                    string json = JsonHelper.GetJson<AccToken>(iden);
                    StreamWriterMetod(json, path);
                }
            }
            else
            {
                access_token = readJSTicket.access_token;
            }
        }
        
        return access_token;
    }


    //发起一个http请球，返回值  
    private static string httpGet(string url)
    {
        try
        {
            WebClient MyWebClient = new WebClient();
            MyWebClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据  
            Byte[] pageData = MyWebClient.DownloadData(url); //从指定网站下载数据  
            string pageHtml = System.Text.Encoding.Default.GetString(pageData);  //如果获取网站页面采用的是GB2312，则使用这句              

            return pageHtml;
        }


        catch (WebException webEx)
        {
            Console.WriteLine(webEx.Message.ToString());
            return null;
        }
    }


    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.UTF8);
        //返回结果网页（html）代码
        string content = sr.ReadToEnd();
        return content;
    }


    //SHA1哈希加密算法  
    public static string SHA1_Hash(string str_sha1_in)
    {
       
        //建立SHA1对象
        SHA1 sha = new SHA1CryptoServiceProvider();
        //将mystr转换成byte[] 
        ASCIIEncoding enc = new ASCIIEncoding();
        byte[] dataToHash = enc.GetBytes(str_sha1_in);
        //Hash运算
        byte[] dataHashed = sha.ComputeHash(dataToHash);
        //将运算结果转换成string
        string hash = BitConverter.ToString(dataHashed).Replace("-", "").ToLower();
        return hash;

    }


    /// <summary>  
    /// StreamWriter写入文件方法  
    /// </summary>  
    private static void StreamWriterMetod(string str, string patch)
    {
        try
        {
            StreamWriter swWriter = new StreamWriter(patch, false);
            swWriter.WriteLine(str);
            swWriter.Close();
        }
        catch (Exception e)
        {
            throw e;
        }
    }

    /// <summary>  
    /// 将c# DateTime时间格式转换为Unix时间戳格式  
    /// </summary>  
    /// <param name="time">时间</param>  
    /// <returns>double</returns>  
    public static int ConvertDateTimeInt(System.DateTime time)
    {
        int intResult = 0;
        System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
        intResult = Convert.ToInt32((time - startTime).TotalSeconds);
        return intResult;
    }

//创建Json序列化 及反序列化类目  
#region
//创建JSon类 保存文件 jsapi_ticket.json  
public class JSTicket
{

    public string jsapi_ticket { get; set; }

    public double expire_time { get; set; }
}
//创建 JSon类 保存文件 access_token.json  

public class AccToken
{

    public string access_token { get; set; }

    public double expires_in { get; set; }
}


//创建从微信返回结果的一个类 用于获取ticket  

public class Jsapi
{

    public int errcode { get; set; }

    public string errmsg { get; set; }

    public string ticket { get; set; }

    public string expires_in { get; set; }
}
#endregion  

{"access_token":"","expires_in":0}

{"expire_time":0,"jsapi_ticket":""}