通过微信公众平台实现在线客服机器人功能。主要的功能包括：简单对话、查询天气等服务。
这里只是提供比较简单的功能，重在通过此实例来说明公众平台的具体研发过程。只是一个简单DEMO，如果需要的话可以在此基础上进行扩展。
当然后续我们还会推出比较复杂的应用实例。
这里不再赘述，参照上一章，微信公众账号开发教程（二） 基础框架搭建
这里不再赘述，参照上一章，微信公众账号开发教程（二） 基础框架搭建
当微信用户关注公众账号时，可以给其适当的提示。可以是欢迎词，可以是帮助提示。
直接上代码：
class EventHandler : IHandler { /// /// 请求的xml /// private string RequestXml { get; set; } /// /// 构造函数 /// ///
/// codes = from item in Cities where item.Value != null && (item.Value.Name.Equals(name, StringComparison.OrdinalIgnoreCase) || item.Value.PinYin.Equals(name, StringComparison.OrdinalIgnoreCase) || item.Value.FristLetter.Equals(name, StringComparison.OrdinalIgnoreCase)) select item.Value.Code; if (codes != null && codes.Count() > 0) { cityCode = codes.First(); } //http请求，获取天气 if (!string.IsNullOrEmpty(cityCode)) { string url = "http://www.php.cn/{0}.html"; url = string.Format(url, cityCode); WebRequest request = HttpWebRequest.Create(url); //超时时间为：2秒 request.Timeout = 2000; request.Credentials = CredentialCache.DefaultCredentials; WebResponse response = request.GetResponse(); StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8); string weahterInfo = reader.ReadToEnd(); if (string.IsNullOrEmpty(weahterInfo)) { result = "暂时没有取到天气数据,请稍后再试"; } else { XmlDocument doc = JsonConvert.DeserializeXmlNode(weahterInfo); if (doc != null) { XmlNode node = doc.DocumentElement; if (node != null) { StringBuilder builder = new StringBuilder(); builder.Append(node["city"].InnerText).Append("n"); builder.Append(node["date_y"].InnerText).Append(" ").Append(node["week"].InnerText).Append("n"); builder.Append("今天：").Append("(").Append(node["temp1"].InnerText).Append(")").Append(node["weather1"].InnerText).Append(node["wind1"].InnerText).Append(node["fl1"].InnerText).Append("n"); builder.Append("24小时穿衣指数:").Append(node["index_d"].InnerText).Append("n"); builder.Append("明天：").Append("(").Append(node["temp2"].InnerText).Append(")").Append(node["weather2"].InnerText).Append(node["wind2"].InnerText).Append(node["fl2"].InnerText).Append("n"); builder.Append("48小时穿衣指数:").Append(node["index48_d"].InnerText).Append("n"); result = builder.ToString(); } } #region 天气json数据格式 /* { "weatherinfo": { "city": "北京", "city_en": "beijing", "date_y": "2013年11月4日", "date": "", "week": "星期一", "fchh": "11", "cityid": "101010100", "temp1": "17℃~5℃", "temp2": "16℃~5℃", "temp3": "18℃~4℃", "temp4": "17℃~5℃", "temp5": "14℃~6℃", "temp6": "14℃~2℃", "tempF1": "62.6℉~41℉", "tempF2": "60.8℉~41℉", "tempF3": "64.4℉~39.2℉", "tempF4": "62.6℉~41℉", "tempF5": "57.2℉~42.8℉", "tempF6": "57.2℉~35.6℉", "weather1": "晴转多云", "weather2": "多云", "weather3": "多云转晴", "weather4": "晴转多云", "weather5": "多云转阴", "weather6": "阴转晴", "img1": "0", "img2": "1", "img3": "1", "img4": "99", "img5": "1", "img6": "0", "img7": "0", "img8": "1", "img9": "1", "img10": "2", "img11": "2", "img12": "0", "img_single": "0", "img_title1": "晴", "img_title2": "多云", "img_title3": "多云", "img_title4": "多云", "img_title5": "多云", "img_title6": "晴", "img_title7": "晴", "img_title8": "多云", "img_title9": "多云", "img_title10": "阴", "img_title11": "阴", "img_title12": "晴", "img_title_single": "晴", "wind1": "微风", "wind2": "微风", "wind3": "微风", "wind4": "微风", "wind5": "微风", "wind6": "北风4-5级", "fx1": "微风", "fx2": "微风", "fl1": "小于3级", "fl2": "小于3级", "fl3": "小于3级", "fl4": "小于3级", "fl5": "小于3级", "fl6": "4-5级", "index": "较冷", "index_d": "建议着大衣、呢外套加毛衣、卫衣等服装。体弱者宜着厚外套、厚毛衣。因昼夜温差较大，注意增减衣服。", "index48": "冷", "index48_d": "天气冷，建议着棉服、羽绒服、皮夹克加羊毛衫等冬季服装。年老体弱者宜着厚棉衣、冬大衣或厚羽绒服。", "index_uv": "中等", "index48_uv": "弱", "index_xc": "适宜", "index_tr": "适宜", "index_co": "舒适", "st1": "17", "st2": "5", "st3": "17", "st4": "5", "st5": "18", "st6": "6", "index_cl": "适宜", "index_ls": "适宜", "index_ag": "极不易发" }} */ #endregion } } else { result = "没有获取到该城市的天气,请确定输入了正确的城市名称,如'北京'或者'beijing'或者'bj'"; } //返回 return result; } /// /// 内部类：城市 /// internal class City { /// /// 编码 /// public string Code { get; set; } /// /// 名称 /// public string Name { get; set; } /// /// 拼音 /// public string PinYin { get; set; } /// /// 拼音首字母 /// public string FristLetter { get; set; } } } 更多微信公众平台开发教程（四） 实例入门：机器人相关文章请关注PHP中文网！
