微信公众号分享格式自定义

微信文章默认分享格式是标题，摘要，和一个图片。公众号文章分享是类似这个格式。

但非公众号网页，比如自己的H5网页，则要写一定的代码才能实现

    <script src="http://res.wx.qq.com/open/js/jweixin-1.1.0.js" type="text/javascript"></script>
    <script type="text/javascript">

        wx.config({
            debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。
            appId: '<%=appid%>', // 必填，公众号的唯一标识
        timestamp: '<%=timestamp%>', // 必填，生成签名的时间戳
        nonceStr: '<%=nonceStr%>', // 必填，生成签名的随机串
        signature: '<%=signature%>', // 必填，签名，见附录1
            jsApiList: ['checkJsApi',
                'onMenuShareTimeline',
                'onMenuShareAppMessage'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
        });

        var url = document.URL;
        if (url.indexOf("&openid") != -1)
            url = url.substring(0, url.indexOf("&openid"));
        var title = "我正在参加￥19.9看电影的活动,请你送我一条锦鲤！";
        var desc = "帮 <%=owner_nickname %> 助力，抽免费电影票！";
        var imgUrl = "http://xxx.cn/wx/images/fish.jpg";
        wx.ready(function () {


            wx.onMenuShareTimeline({
                title: title, // 分享标题
                desc: desc,
                imgUrl: imgUrl,
                link: url, // 分享链接
                success: function () {
                    // 用户确认分享后执行的回调函数
                },
                cancel: function () {
                    // 用户取消分享后执行的回调函数
                }
            });
            wx.onMenuShareAppMessage({
                title: title, // 分享标题
                desc: desc,
                imgUrl: imgUrl,
                link: url, // 分享链接

                success: function () {
                    // 用户确认分享后执行的回调函数
                },
                cancel: function () {
                    // 用户取消分享后执行的回调函数
                }
            });
        });
    </script>

调试时，要把wx.config({  debug: true}} 打开，不然你找不到错误。

后台代码生成timestamp，nonceStr，signature：

       public  long CreatenTimestamp()
        {
            return (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
        }
        public  string CreatenNonce_str()
        {
            string[] strs = new string[]
                        {
                        "a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",
                        "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"
                        };
            Random r = new Random();
            var sb = new StringBuilder();
            var length = strs.Length;
            for (int i = 0; i < 15; i++)
            {
                sb.Append(strs[r.Next(length - 1)]);
            }
            return sb.ToString();
        }
        public  string GetSignature(string jsapi_ticket, string timestamp, string nonce, string url)
        {
            url = url.IndexOf("#") >= 0 ? url.Substring(0, url.IndexOf("#")) : url;

            string tmpStr = "jsapi_ticket=" + jsapi_ticket + "&noncestr=" + nonce + "&timestamp=" + timestamp + "&url=" + url;

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

            return tmpStr;
        }

写完之后，假如你没有在公众号后台设置，一定会碰到这个错误。

调试返回参数：

{ "errMsg": "config:invalid url domain" }

截图：

环境：

微信测试号，非正式的公共号

说明：

需要在公众号设置=》 功能设置里配置