Re0:用.Net写一个微信公众号

直奔主题，写一个公众号。包含基本微信前端效果，常用的增删改查功能、支付回调功能、推送消息功能。

暂时想到这么多。

首先感谢官方提供的好东西（请忽略版本号(╯‵□′)╯︵┻━┻）

<script type="text/javascript" src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

 

有点用的签名算法

/// <summary>
    /// 签名算法
    /// </summary>
    /// <param name="jsapi_ticket">jsapi_ticket</param>
    /// <param name="noncestr">随机字符串(必须与wx.config中的noncestr相同)</param>
    /// <param name="timestamp">时间戳(必须与wx.config中的timestamp相同)</param>
    /// <param name="url">当前网页的url，不包含#及其后面部分(必须是调用js接口页面的完整url)</param>
    /// <returns></returns>
    public static string getsignature(string jsapi_ticket, string noncestr, long timestamp, string url, out string string1)// 生成微信接口的签名
    {
        stringbuilder string1builder = new stringbuilder();
        string1builder.append("jsapi_ticket=").append(jsapi_ticket).append("&")
                      .append("noncestr=").append(noncestr).append("&")
                      .append("timestamp=").append(timestamp).append("&")
                      .append("url=").append(url.indexof("#") >= 0 ? url.substring(0, url.indexof("#")) : url);
        string1 = string1builder.tostring();
        return formsauthentication.hashpasswordforstoringinconfigfile(string1, "sha1");
    }

 

　有点用的token

/// <summary>
    /// 获取access_token
    /// </summary>
    /// <returns></returns>
    public static string getaccesstoken()// 获取access_token
    {
        string appid = system.configuration.configurationmanager.appsettings["appid"];
        string appsecret = system.configuration.configurationmanager.appsettings["appsecret"];
        conndb db = new conndb();
        datarow dr = db.returndatatable("select token,time from balabulabula ").rows[0];
        string access_token = dr["token"].tostring();
        string yxq = dr["time"].tostring(); if (yxq == "") yxq = "2016-01-01";
        if (datetime.now >= datetime.parse(yxq))
        {
            access_token = parsefromjson<access_token>(getpage("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appid + "&secret=" + appsecret, "")).access_token;
            db.editdatabase("update bulabulabula set token='" + access_token + "',time=convert(varchar(20),dateadd(ss,6000,getdate()),120) where mc='access_token'");
        }
        return access_token;
    }

 

有点用的微信js

/// <summary>
    /// 生成微信配置js
    /// </summary>
    /// <returns></returns>
    public static string wxconfig()// 生成微信配置js
    {
        conndb db = new conndb();
        string url = httpcontext.current.request.url.absoluteuri;
        if (url.indexof('#') > 0) url = url.substring(0, url.indexof('#'));
        string appid = system.configuration.configurationmanager.appsettings["appid"];
        datarow dr = db.returndatatable("select token,time from bulabulabula'").rows[0];
        string jsapi_ticket = dr["token"].tostring();
        string yxq = dr["time"].tostring(); if (yxq == "") yxq = "2016-01-01";
        if (datetime.now >= datetime.parse(yxq))
        {
            string access_token = getaccesstoken();
            jsapi_ticket = parsefromjson<jsapi_ticket>(getpage("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + access_token + "&type=jsapi", "")).ticket;
            db.editdatabase("update bualbulabula set token='" + jsapi_ticket + "',time=convert(varchar(20),dateadd(ss,6000,getdate()),120) ");
        }

        string noncestr = creatennonce_str();
        long timestamp = createntimestamp();
        string str1;
        string signature = getsignature(jsapi_ticket, noncestr, timestamp, url, out str1);

        return @"
<script type='text/javascript'>
    wx.error(function (res) {
        alert(res.errmsg);
    });

    wx.config({
        debug: false,
        appid: '" + appid + @"',
        timestamp: " + timestamp.tostring() + @",
        noncestr: '" + noncestr + @"',
        signature: '" + signature + @"',
        jsapilist: ['scanqrcode', 'chooseimage', 'uploadimage', 'getlocation', 'openlocation']
    });

    function wxalert(txt) {
        $('#dlg_alert').show();
        $('#wxdlg_alert_text').text(txt);
    }
</script>

<link href='css/weui.min.css' rel='stylesheet'/>
<div class='weui_dialog_alert' id='dlg_alert' style='display: none;'>
    <div class='weui_mask'></div>
    <div class='weui_dialog'>
        <div class='weui_dialog_hd'><strong class='weui_dialog_title'>提示</strong></div>
        <div class='weui_dialog_bd' id='wxdlg_alert_text'>弹窗内容，告知当前页面信息等</div>
        <div class='weui_dialog_ft'>
            <a href=""javascript:$('#dlg_alert').hide();"" class='weui_btn_dialog primary'>确定</a>
        </div>
    </div>
</div>";
    }

 

生成微信alert

/// <summary>
    /// 生成微信alert
    /// </summary>
    /// <returns></returns>
    public static string wxalert()// 生成微信alert
    {
        return @"
<script type='text/javascript'>
    function wxalert(txt) {
        $('#dlg_alert').show();
        $('#wxdlg_alert_text').text(txt);
    }
</script>

<link href='css/weui.min.css' rel='stylesheet'/>
<div class='weui_dialog_alert' id='dlg_alert' style='display: none;'>
    <div class='weui_mask'></div>
    <div class='weui_dialog'>
        <div class='weui_dialog_hd'><strong class='weui_dialog_title'>提示</strong></div>
        <div class='weui_dialog_bd' id='wxdlg_alert_text'>弹窗内容，告知当前页面信息等</div>
        <div class='weui_dialog_ft'>
            <a href=""javascript:$('#dlg_alert').hide();"" class='weui_btn_dialog primary'>确定</a>
        </div>
    </div>
</div>";
    }

 

生成微信支付的签名

/// <summary>
    /// 生成微信支付的签名
    /// </summary>
    /// <param name="sparams"></param>
    /// <returns></returns>
    public static string makewxpaysign(sorteddictionary<string, string> sparams)// 生成微信支付的签名
    {
        string key = system.configuration.configurationmanager.appsettings["wechatpaykey"];
        stringbuilder sb = new stringbuilder();
        foreach (keyvaluepair<string, string> temp in sparams)
        {
            if (temp.value == "" || temp.value == null || temp.key.tolower() == "sign")
            {
                continue;
            }
            sb.append(temp.key.trim() + "=" + temp.value.trim() + "&");
        }

        sb.append("key=" + key.trim() + "");
        string signkey = sb.tostring();

        system.security.cryptography.md5 md5 = system.security.cryptography.md5.create();
        byte[] data = md5.computehash(system.text.encoding.utf8.getbytes(signkey));
        sb = new stringbuilder();
        for (int n = 0; n < data.length; n++)
        {
            sb.append(data[n].tostring("x2"));
        }

        return sb.tostring().toupper();
    }

 

生成微信支付用的js

/// <summary>
    /// 生成微信支付用的js
    /// </summary>
    /// <param name="openid">微信用户openid</param>
    /// <param name="ddbh">订单编号</param>
    /// <param name="je">订单总金额</param>
    /// <returns></returns>
    public static string makewxpayjs(string openid, string ddbh, string je)// 生成微信支付用的js
    {
        string rv = "";
        try
        {
            conndb db = new conndb();
            
            //获取订单编号相关
　　　　　　　string appid = system.configuration.configurationmanager.appsettings["appid"];
            string mch_id = system.configuration.configurationmanager.appsettings["wechatpaynum"];
            string nonce_str = creatennonce_str();
            string ip = "127.0.0.1";

            //ddbh = "2018062500014";

            sorteddictionary<string, string> sparams = new sorteddictionary<string, string>();
            sparams.add("appid", appid);
            sparams.add("body", "");
            sparams.add("device_info", "web");
            sparams.add("mch_id", mch_id);//微信商户号
            sparams.add("nonce_str", nonce_str);
            sparams.add("notify_url", "http://" + system.configuration.configurationmanager.appsettings["thisurl"] + "/wechat/pay/dealnotify_wx.aspx");//接收回调通知的网址
            sparams.add("openid", openid);//微信用户openid
            sparams.add("out_trade_no", ddbh);//订单号
            sparams.add("spbill_create_ip", ip);//发起者ip
            sparams.add("total_fee", je);//总金额
            sparams.add("trade_type", "jsapi");
            sparams.add("sign", makewxpaysign(sparams));
            stringbuilder sb = new stringbuilder();
            sb.append("<xml>");
            foreach (keyvaluepair<string, string> temp in sparams)
            {
                if (temp.value == "" || temp.value == null) continue;
                sb.append("<" + temp.key.trim() + ">");
                sb.append(temp.value.trim());
                sb.append("</" + temp.key.trim() + ">");
            }
            sb.append("</xml>");
            rv = getpage("https://api.mch.weixin.qq.com/pay/unifiedorder", sb.tostring());
            datatable dt = dataxml.cxmltodataset(rv).tables[0];
            string prepay_id = dt.rows[0]["prepay_id"].tostring();
            string timestamp = createntimestamp().tostring();
            sparams = new sorteddictionary<string, string>();
            sparams.add("appid", appid);
            sparams.add("timestamp", timestamp);
            sparams.add("noncestr", nonce_str);
            sparams.add("package", "prepay_id=" + prepay_id);
            sparams.add("signtype", "md5");

            string getbrandwcpayrequest = "'appid' : '" + appid + "','timestamp': '" + timestamp + "','noncestr' : '" + nonce_str + "','package' : 'prepay_id=" + prepay_id + "','signtype' : 'md5','paysign' : '" + makewxpaysign(sparams) + "'";

            //修改支付记录状态

            return @"
<script>
    function onbridgeready(){
        weixinjsbridge.invoke(
            'getbrandwcpayrequest', {" + getbrandwcpayrequest + @"},
            function(res){
                if(res.err_msg == 'get_brand_wcpay_request:ok' ) {
                    location='/wechat/sc_fkcg.aspx';
                }
                //alert('res.err_msg:'+res.err_msg+' err_code:'+res.err_code+' err_desc:'+res.err_desc);
            }
        );
    }
    function callpay()
    {
        if (typeof weixinjsbridge == 'undefined'){
           if( document.addeventlistener ){
               document.addeventlistener('weixinjsbridgeready', onbridgeready, false);
           }else if (document.attachevent){
               document.attachevent('weixinjsbridgeready', onbridgeready); 
               document.attachevent('onweixinjsbridgeready', onbridgeready);
           }
        }else{
           onbridgeready();
        }
    }
</script>";
        }
        catch (exception ex)
        {
            return "错误：" + ex.message + "　　" + rv;
        }
    }

 

微信支付回调页面

stream s = request.inputstream;
            int count = 0;
            byte[] buffer = new byte[1024];
            stringbuilder sb = new stringbuilder();
            while ((count = s.read(buffer, 0, 1024)) > 0)
            {
                sb.append(encoding.utf8.getstring(buffer, 0, count));
            }
            s.flush();
            s.close();
            s.dispose();
            sxml = sb.tostring();

            datatable dt = dataxml.cxmltodataset(sxml).tables[0];
            datarow dr = dt.rows[0];
            if (dr["return_code"].tostring() != "success") return;//return_code不正确

            sorteddictionary<string, string> sparams = new sorteddictionary<string, string>();
            foreach (datacolumn dc in dt.columns)
            {
                sparams.add(dc.columnname, dr[dc.columnname].tostring());
            }
            string sign = assclass.makewxpaysign(sparams);
            if (sign != dr["sign"].tostring()) return;//签名验证失败，该数据可能并非来自微信官方

            string ddbh = dr["out_trade_no"].tostring();
            string tname, tid;

            if (dr["result_code"].tostring() == "success")//支付成功
            {
            }
            else//支付失败
            {
               
            }
            db.editdatabase(sql);
            response.write("<xml><return_code><![cdata[success]]></return_code><return_msg><![cdata[ok]]></return_msg></xml>");//通知微信已成功接受到通知

 

补充一个公众号引导页面

    string appid = system.configuration.configurationmanager.appsettings["appid"];
    string appsecret = system.configuration.configurationmanager.appsettings["appsecret"];
    protected void page_load(object sender, eventargs e)
    {
        if (!ispostback)
        {
            if (!string.isnullorempty(request.querystring["code"]))
            {
                if (ck.getcookies("openid") == null || ck.getcookies("openid") == "")
                {
                    string code = request.querystring["code"].tostring();
                    oauth_token model = get_token(code);//获得token
                    oauthuser oauthuser_model = get_userinfo(model.access_token, model.openid);
                    ck.setcookies("openid", oauthuser_model.openid, 5);
                    ck.setcookies("nickname", oauthuser_model.nickname, 5);
                    ck.setcookies("headimgurl", oauthuser_model.headimgurl, 5);
                }
                string openid = ck.getcookies("openid");
                string nickname = ck.getcookies("nickname");
                string headimgurl = ck.getcookies("headimgurl");

                datatable dt = db.returndatatable("select * from bulabulabula where openid='" + openid + "'");
                if (dt.rows.count == 0)//尚无该会员信息
                {
                    string newid = db.getnewid("hy");
                    db.editdatabase("insert into bulabulabula(*) values(" + newid + ",'" + openid + "','" + nickname + "','" + headimgurl + "',getdate())");
                    ck.setcookies("userid", newid, 30);
                    ck.setcookies("username", nickname, 30);
                }
                else//已有该用户
                {
                    ck.setcookies("userid", dt.rows[0]["id"].tostring(), 30);
                    ck.setcookies("username", dt.rows[0]["name"].tostring(), 30);
                }

                string url;
                if (request.querystring["pageid"] == null)
                {
                    response.write("<script>alert('无跳转参数'); weixinjsbridge.call('closewindow');</script>");
                    return;
                }
                string pageid = request.querystring["pageid"].tostring();
                switch (pageid)
                {
                    case "1"://用户信息
                        url = "/wechat/user.aspx";
                        break;
                    case "2"://其他内容
                        url = "/wechat/something.aspx";
                        break;default:
                        
               　　　　  response.write("<script>alert('参数异常'); weixinjsbridge.call('closewindow');</script>");
                        return;
                       
                        break;
                }
                response.redirect(url);
            }
            else
            {
                if (request.querystring["pageid"] == null)
                {
                    response.write("<script>alert('无跳转参数'); weixinjsbridge.call('closewindow');</script>");
                    return;
                }

                string url = "url";
                response.redirect(url);
            }
        }
    }

    //获得token
    protected oauth_token get_token(string code)
    {
        string str = assclass.getpage("https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + appid + "&secret=" + appsecret + "&code=" + code + "&grant_type=authorization_code", "");
        oauth_token oauth_token_model = assclass.parsefromjson<oauth_token>(str);
        return oauth_token_model;
    }
    //刷新token
    protected oauth_token refresh_token(string refresh_token)
    {
        string str = assclass.getpage("https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=" + appid + "&grant_type=refresh_token&refresh_token=" + refresh_token, "");
        oauth_token oauth_token_model = assclass.parsefromjson<oauth_token>(str);
        return oauth_token_model;
    }
    //获得用户信息
    protected oauthuser get_userinfo(string refresh_token, string openid)
    {
        // response.write("获得用户信息refresh_token:" + refresh_token + "||openid:" + openid);
        string str = assclass.getpage("https://api.weixin.qq.com/sns/userinfo?access_token=" + refresh_token + "&openid=" + openid, "");
        oauthuser oauthuser_model = assclass.parsefromjson<oauthuser>(str);
        return oauthuser_model;
    }