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./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1jsApiList: ['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 = "/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 + "×tamp=" + 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
