ASP.Net获得新浪天气预报几种方式总结刚赶工写了一个获取新浪天气预报的功能，顺便把代码分享了出来，以后再有这样的工作，大家可以直接把代码拿来使用。
1.利用新浪提供给的iframe直接嵌入，这种方式非常的简单，但是却没有交互性。代码如下： <iframe frameborder="0" src="http://php.weather.sina.com.cn/widget/weather.php" scrolling="no" width="246" height="360"></iframe
2.抓取当天的天气，以指定格式输出。 涉及的核心代码如下： Code public static ArrayList GetWeather(string code)
{
/*
[0] "北京 "string
[1] "雷阵雨 "string
[2] "9℃" string
[3] "29℃"string
[4] "小于3级"string
*/
string html = "";
try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://weather.sina.com.cn/iframe/weather/" + code + "_w.html ");
request.Method = "Get";
//request.Timeout = 1;
request.ContentType = "application/x-www-form-urlencoded ";
WebResponse response = request.GetResponse();
Stream s = response.GetResponseStream();
StreamReader sr = new StreamReader(s, System.Text.Encoding.GetEncoding("GB2312"));
html = sr.ReadToEnd();
s.Close();
sr.Close();
}
catch (Exception err)
{
throw new Exception("访问地址出错~~~ ");
} int count = html.Length;
int starIndex = html.IndexOf("<table ", 0, count);
int endIndex = html.IndexOf("</table>", starIndex, count - starIndex);
html = html.Substring(starIndex, endIndex - starIndex + 8); //得到城市
int cityStartIndex = html.IndexOf("<b>", 0, html.Length);
int cityEndIndex = html.IndexOf("</b>", 0, html.Length);
string City = html.Substring(cityStartIndex + 3, cityEndIndex - cityStartIndex - 3);
//得到天气
int weatherStartIndex = html.IndexOf("<b>", cityEndIndex);
int weatherEndIndex = html.IndexOf("</b>", weatherStartIndex);
string Weather = html.Substring(weatherStartIndex + 3, weatherEndIndex - weatherStartIndex - 3);
//得到温度 int temperatureStartIndex = html.IndexOf("<b", weatherEndIndex);
int temperatureEndIndex = html.IndexOf("</b>", weatherEndIndex + 3);
string Temperature = html.Substring(temperatureStartIndex + 21, temperatureEndIndex - temperatureStartIndex - 21); int int1 = Temperature.IndexOf("℃", 0);
int int2 = Temperature.IndexOf("～", 0);
int int3 = Temperature.IndexOf("℃", int2); string MinTemperature = Temperature.Substring(int2 + 1, int3 - int2);
string MaxTemperature = Temperature.Substring(0, int2 - int1 + 2); //得到风力
int windforceStartIndex = html.IndexOf("风力：", temperatureEndIndex);
int windforceEndIndex = html.IndexOf("<br>", windforceStartIndex);
string Windforce = html.Substring(windforceStartIndex + 3, windforceEndIndex - windforceStartIndex - 3); if (Windforce.Contains("小于") && (!Windforce.Contains("等于"))) //判断风力是否含有"小于"或"小于等于"字样将,如果有的话，将其替换为2-
{
//Windforce = Windforce.Replace("小于", "2-");
string strWindforce = Windforce.Substring(2, Windforce.Length - 3);
int minWindforce = Int32.Parse(strWindforce) - 1;
Windforce = Windforce.Replace("小于", minWindforce.ToString() + "-"); }
else if (Windforce.Contains("小于等于"))
{
string strWindforce = Windforce.Substring(4, Windforce.Length - 5);
int minWindforce = Int32.Parse(strWindforce) - 1;
Windforce = Windforce.Replace("小于等于", minWindforce.ToString() + "-");
} ArrayList al = new ArrayList();
al.Add(City);
al.Add(Weather);
al.Add(MinTemperature);
al.Add(MaxTemperature);
al.Add(Windforce); return al;
} 这里涉及到一个ConvertCode类，它的作用是用于把城市转换为对应的全国统一的编码， 代码如下： Code using System;
using System.Collections.Generic;
using System.Web; namespace WebApplication8
{
public class ConvertCode
{
public static string ConvertCodeByCity(string City)
{
string Code = "";
switch (City)
{
case "北京":
Code = "110100";
break;
case "天津":
Code = "120100";
break;
case "石家庄":
Code = "130101";
break;
case "唐山":
Code = "130201";
break;
case "秦皇岛":
Code = "130301";
break;
case "张家口":
Code = "130701";
break;
case "承德":
Code = "130801";
break;
case "廊坊":
Code = "131001";
break;
case "邯郸":
Code = "130401";
break;
case "邢台":
Code = "130501";
break;
case "保定":
Code = "130601";
break;
case "沧州":
Code = "130901";
break;
case "衡水":
Code = "133001";
break;
case "太原":
Code = "140101";
break;
case "大同":
Code = "140201";
break;
case "阳泉":
Code = "140301";
break;
case "晋城":
Code = "140501";
break;
case "朔州":
Code = "140601";
break;
case "忻州":
Code = "142201";
break;
case "离石":
Code = "142331";
break;
case "榆次":
Code = "142401";
break;
case "临汾":
Code = "142601";
break;
case "运城":
Code = "142701";
break;
case "长治":
Code = "140401";
break;
case "呼和浩特":
Code = "150101";
break;
case "包头":
Code = "150201";
break;
case "乌海":
Code = "150301";
break;
case "集宁":
Code = "152601";
break;
case "巴彦浩特": //这个城市搜索不到
Code = "152701";
break;
case "临河":
Code = "152801";
break;
case "鄂尔多斯": //这个城市搜索不到
Code = "152921";
break;
case "赤峰":
Code = "150401";
break;
case "通辽":
Code = "152301";
break;
case "锡林浩特":
Code = "152502";
break;
case "海拉尔": //这个城市搜索不到
Code = "152101";
break;
case "乌兰浩特":
Code = "152201";
break;
case "沈阳":
Code = "210101";
break;
case "大连":
Code = "210201";
break;
case "鞍山":
Code = "210301";
break;
case "抚顺":
Code = "210401";
break;
case "本溪":
Code = "210501";
break;
case "锦州":
Code = "210701";
break;
case "营口":
Code = "210801";
break;
case "阜新":
Code = "210901";
break;
case "盘锦":
Code = "211101";
break;
case "铁岭":
Code = "211201";
break;
case "朝阳":
Code = "211301";
break;
case "葫芦岛":
Code = "211401";
break;
case "丹东":
Code = "210601";
break;
case "长春":
Code = "220101";
break;
case "吉林":
Code = "220201";
break;
case "四平":
Code = "220301";
break;
case "辽源":
Code = "220401";
break;
case "松原":
Code = "220601";
break;
case "白城":
Code = "222301";
break;
case "延边":
Code = "222401";
break;
case "通化":
Code = "220501";
break;
case "哈尔滨":
Code = "230101";
break;
case "鸡西":
Code = "230301";
break;
case "鹤岗":
Code = "230401";
break;
case "双鸭山":
Code = "230501";
break;
case "伊春":
Code = "230701";
break;
case "佳木斯":
Code = "230801";
break;
case "七台河":
Code = "230901";
break;
case "牡丹江":
Code = "231001";
break;
case "绥化":
Code = "232301";
break;
case "齐齐哈尔":
Code = "230201";
break;
case "大庆":
Code = "230601";
break;
case "黑河":
Code = "232601";
break;
case "大兴安岭":
Code = "232700";
break;
case "上海":
Code = "310100";
break;
case "南京":
Code = "320101";
break;
case "无锡":
Code = "320201";
break;
case "徐州":
Code = "320301";
break;
case "常州":
Code = "320401";
break;
case "苏州":
Code = "320501";
break;
case "南通":
Code = "320600";
break;
case "连云港":
Code = "320701";
break;
case "淮阴":
Code = "320801";
break;
case "盐城":
Code = "320901";
break;
case "扬州":
Code = "321001";
break;
case "镇江":
Code = "321101";
break;
case "泰州":
Code = "321102";
break;
case "宿迁":
Code = "321103";
break;
case "杭州":
Code = "330101";
break;
case "宁波":
Code = "330201";
break;
case "温州":
Code = "330301";
break;
case "嘉兴":
Code = "330401";
break;
case "湖州":
Code = "330501";
break;
case "绍兴":
Code = "330601";
break;
case "金华":
Code = "330701";
break;
case "衢州":
Code = "330801";
break;
case "舟山":
Code = "330901";
break;
case "丽水":
Code = "332501";
break;
case "台州":
Code = "332602";
break;
case "合肥":
Code = "340101";
break;
case "芜湖":
Code = "340201";
break;
case "蚌埠":
Code = "340301";
break;
case "淮南":
Code = "340401";
break;
case "马鞍山":
Code = "340501";
break;
case "淮北":
Code = "340601";
break;
case "铜陵":
Code = "340701";
break;
case "安庆":
Code = "340801";
break;
case "黄山市":
Code = "341001";
break;
case "阜阳":
Code = "342101";
break;
case "宿州":
Code = "342201";
break;
case "滁州":
Code = "342301";
break;
case "六安":
Code = "342401";
break;
case "宣城":
Code = "342501";
break;
case "巢湖":
Code = "342601";
break;
case "池州":
Code = "342901";
break;
case "福州":
Code = "350101";
break;
case "厦门":
Code = "350201";
break;
case "莆田":
Code = "350301";
break;
case "三明":
Code = "350401";
break;
case "泉州":
Code = "350501";
break;
case "漳州":
Code = "350601";
break;
case "南平":
Code = "352101";
break;
case "宁德":
Code = "352201";
break;
case "龙岩":
Code = "352601";
break;
case "陇南":
Code = "352602";
break;
case "庆阳":
Code = "352603";
break;
case "南昌":
Code = "360101";
break;
case "景德镇":
Code = "360201";
break;
case "赣州":
Code = "362101";
break;
case "萍乡":
Code = "360301";
break;
case "九江":
Code = "360401";
break;
case "新余":
Code = "360501";
break;
case "鹰潭":
Code = "360601";
break;
case "宜春":
Code = "362201";
break;
case "上饶":
Code = "362301";
break;
case "吉安":
Code = "362401";
break;
case "济南":
Code = "370101";
break;
case "青岛":
Code = "370201";
break;
case "淄博":
Code = "370301";
break;
case "枣庄":
Code = "370401";
break;
case "东营":
Code = "370501";
break;
case "烟台":
Code = "370601";
break;
case "潍坊":
Code = "370701";
break;
case "济宁":
Code = "370801";
break;
case "泰安":
Code = "370901";
break;
case "威海":
Code = "371001";
break;
case "日照":
Code = "371100";
break;
case "滨州":
Code = "372301";
break;
case "德州":
Code = "372401";
break;
case "聊城":
Code = "372501";
break;
case "临沂":
Code = "372801";
break;
case "菏泽":
Code = "372901";
break;
case "莱芜":
Code = "372902";
break;
case "郑州":
Code = "410101";
break;
case "开封":
Code = "410201";
break;
case "洛阳":
Code = "410301";
break;
case "平顶山":
Code = "410401";
break;
case "安阳":
Code = "410501";
break;
case "鹤壁":
Code = "410601";
break;
case "新乡":
Code = "410701";
break;
case "焦作":
Code = "410801";
break;
case "濮阳":
Code = "410901";
break;
case "许昌":
Code = "411001";
break;
case "漯河":
Code = "411101";
break;
case "三门峡":
Code = "411201";
break;
case "商丘":
Code = "412301";
break;
case "周口":
Code = "412701";
break;
case "驻马店":
Code = "412801";
break;
case "南阳":
Code = "412901";
break;
case "信阳":
Code = "413001";
break;
case "武汉":
Code = "420101";
break;
case "黄石":
Code = "420201";
break;
case "十堰":
Code = "420301";
break;
case "随州":
Code = "420400";
break;
case "宜昌":
Code = "420501";
break;
case "襄樊":
Code = "420601";
break;
case "鄂州":
Code = "420701";
break;
case "荆门":
Code = "420801";
break;
case "黄冈":
Code = "422103";
break;
case "孝感":
Code = "422201";
break;
case "咸宁":
Code = "422301";
break;
case "荆州":
Code = "422421";
break;
case "恩施":
Code = "422801";
break;
case "长沙":
Code = "430101";
break;
case "衡阳":
Code = "430401";
break;
case "邵阳":
Code = "430501";
break;
case "郴州":
Code = "432801";
break;
case "永州":
Code = "432901";
break;
case "韶山":
Code = "430801";
break;
case "张家界":
Code = "430802";
break;
case "怀化":
Code = "433001";
break;
case "吉首":
Code = "433101";
break;
case "株洲":
Code = "430201";
break;
case "湘潭":
Code = "430301";
break;
case "岳阳":
Code = "430601";
break;
case "常德":
Code = "430701";
break;
case "益阳":
Code = "432301";
break;
case "娄底":
Code = "432501";
break;
case "广州":
Code = "440101";
break;
case "佛山":
Code = "440601";
break;
case "深圳":
Code = "440301";
break;
case "汕尾":
Code = "441501";
break;
case "惠州":
Code = "441301";
break;
case "河源":
Code = "441601";
break;
case "清远":
Code = "441801";
break;
case "东莞":
Code = "441901";
break;
case "珠海":
Code = "440401";
break;
case "江门":
Code = "440701";
break;
case "肇庆":
Code = "441201";
break;
case "中山":
Code = "442001";
break;
case "湛江":
Code = "440801";
break;
case "茂名":
Code = "440901";
break;
case "韶关":
Code = "440201";
break;
case "汕头":
Code = "440501";
break;
case "梅州":
Code = "441401";
break;
case "阳江":
Code = "441701";
break;
case "潮州":
Code = "441702";
break;
case "顺德":
Code = "441703";
break;
case "揭阳":
Code = "441704";
break;
case "云浮":
Code = "441705";
break;
case "南宁":
Code = "450101";
break;
case "梧州":
Code = "450401";
break;
case "玉林":
Code = "452501";
break;
case "桂林":
Code = "450301";
break;
case "百色":
Code = "452601";
break;
case "河池":
Code = "452701";
break;
case "钦州":
Code = "452802";
break;
case "柳州":
Code = "450201";
break;
case "北海":
Code = "450501";
break;
case "防城港":
Code = "450502";
break;
case "贵港":
Code = "450503";
break;
case "贺州":
Code = "450504";
break;
case "海口":
Code = "460100";
break;
case "三亚":
Code = "460200";
break;
case "西沙群岛":
Code = "460300";
break;
case "成都":
Code = "510101";
break;
case "眉山":
Code = "513321";
break;
case "雅安":
Code = "513101";
break;
case "峨嵋山":
Code = "513229";
break;
case "自贡":
Code = "510301";
break;
case "重庆":
Code = "500100";
break;
case "万州":
Code = "500102";
break;
case "涪陵":
Code = "500103";
break;
case "南充":
Code = "512901";
break;
case "泸州":
Code = "510501";
break;
case "德阳":
Code = "510601";
break;
case "绵阳":
Code = "510701";
break;
case "遂宁":
Code = "510901";
break;
case "内江":
Code = "511001";
break;
case "乐山":
Code = "511101";
break;
case "宜宾":
Code = "512501";
break;
case "广元":
Code = "510801";
break;
case "达州":
Code = "513021";
break;
case "资阳":
Code = "513401";
break;
case "攀枝花":
Code = "510401";
break;
case "阿坝":
Code = "510402";
break;
case "甘孜":
Code = "510403";
break;
case "凉山":
Code = "510404";
break;
case "广安":
Code = "510405";
break;
case "巴中":
Code = "510406";
break;
case "黔江":
Code = "500239";
break;
case "贵阳":
Code = "520101";
break;
case "六盘水":
Code = "520200";
break;
case "铜仁":
Code = "522201";
break;
case "安顺":
Code = "522501";
break;
case "凯里":
Code = "522601";
break;
case "都匀":
Code = "522701";
break;
case "兴义":
Code = "522301";
break;
case "毕节":
Code = "522421";
break;
case "遵义":
Code = "522101";
break;
case "昆明":
Code = "530101";
break;
case "德宏":
Code = "530201";
break;
case "曲靖":
Code = "532201";
break;
case "楚雄":
Code = "532301";
break;
case "玉溪":
Code = "532401";
break;
case "红河":
Code = "532501";
break;
case "文山":
Code = "532621";
break;
case "思茅":
Code = "532721";
break;
case "昭通":
Code = "532101";
break;
case "西双版纳":
Code = "532821";
break;
case "大理":
Code = "532901";
break;
case "保山":
Code = "533001";
break;
case "怒江":
Code = "533121";
break;
case "丽江":
Code = "533221";
break;
case "迪庆":
Code = "533321";
break;
case "临沧":
Code = "533521";
break;
case "拉萨":
Code = "540101";
break;
case "昌都":
Code = "542121";
break;
case "山南":
Code = "542221";
break;
case "日喀则":
Code = "542301";
break;
case "那曲":
Code = "542421";
break;
case "阿里":
Code = "542523";
break;
case "林芝":
Code = "542621";
break;
case "西安":
Code = "610101";
break;
case "铜川":
Code = "610201";
break;
case "宝鸡":
Code = "610301";
break;
case "咸阳":
Code = "610401";
break;
case "渭南":
Code = "612101";
break;
case "汉中":
Code = "612301";
break;
case "安康":
Code = "612401";
break;
case "商洛":
Code = "612501";
break;
case "延安":
Code = "612601";
break;
case "榆林":
Code = "612701";
break;
case "兰州":
Code = "620101";
break;
case "白银":
Code = "620401";
break;
case "金昌":
Code = "620301";
break;
case "天水":
Code = "620501";
break;
case "张掖":
Code = "622201";
break;
case "武威":
Code = "622301";
break;
case "定西":
Code = "622421";
break;
case "平凉":
Code = "622701";
break;
case "临夏":
Code = "622901";
break;
case "嘉峪关":
Code = "620201";
break;
case "酒泉":
Code = "622102";
break;
case "西宁":
Code = "630100";
break;
case "果洛":
Code = "632121";
break;
case "海西":
Code = "632221";
break;
case "格尔木":
Code = "632321";
break;
case "海东":
Code = "632521";
break;
case "海北":
Code = "632621";
break;
case "玉树":
Code = "632721";
break;
case "黄南":
Code = "632802";
break;
case "银川":
Code = "640101";
break;
case "石嘴山":
Code = "640201";
break;
case "吴忠":
Code = "642101";
break;
case "固原":
Code = "642221";
break;
case "乌鲁木齐":
Code = "650101";
break;
case "克拉玛依":
Code = "650201";
break;
case "吐鲁番":
Code = "652101";
break;
case "哈密":
Code = "652201";
break;
case "昌吉":
Code = "652301";
break;
case "博乐":
Code = "652701";
break;
case "库尔勒":
Code = "652801";
break;
case "阿克苏":
Code = "652901";
break;
case "克州":
Code = "653001";
break;
case "喀什":
Code = "653101";
break;
case "伊犁":
Code = "654101";
break;
case "石河子":
Code = "655001";
break;
case "塔城":
Code = "655002";
break;
case "阿勒泰":
Code = "655003";
break;
case "台北":
Code = "710001";
break;
case "辽阳":
Code = "211001";
break;
case "和田":
Code = "653201";
break;
case "澳门":
Code = "820000";
break;
case "香港":
Code = "810000";
break;
default:
break;
}
return Code;
}
}
} 3.获取三天以内的天气，以指定格式输出。 核心代码如下： Code
public static ArrayList GetThreeDayWeather(string City)
{
ArrayList al = new ArrayList();
/*
[0] "今天 北京" string
[1] "2009-04-17，星期五" string
[2] "晴转多云" string
[3] "12℃" string
[4] "25℃" string
[5] "2-3级" string
[6] "明天 北京" string
[7] "2009-04-18，星期六" string
[8] "阴转阵雨" string
[9] "11℃" string
[10] "21℃" string
[11] "2-3级" string
[12] "后天 北京" string
[13] "2009-04-19，星期日" string
[14] "多云转阵雨" string
[15] "9℃" string
[16] "20℃" string
[17] "2-3级" string
*/
string Html = ""; //返回来的网页的源码
ASCIIEncoding encoding = new ASCIIEncoding();
string postData = string.Format("city=" + City);
byte[] data = encoding.GetBytes(postData); try
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://php.weather.sina.com.cn/search.php?city=" + System.Web.HttpContext.Current.Server.UrlEncode(City) + "&f=1&dpc=1");
request.Method = "Get";
request.ContentType = "application/x-www-form-urlencoded ";
WebResponse response = request.GetResponse();
Stream s = response.GetResponseStream();
StreamReader sr = new StreamReader(s, System.Text.Encoding.GetEncoding("GB2312"));
Html = sr.ReadToEnd();
s.Close();
sr.Close();
}
catch (Exception err)
{
throw new Exception("访问地址出错~~~ ");
} //去除多余代码，便于分析跟提高效率
int count = Html.Length;
int starIndex = Html.IndexOf("<div id=\"Weather3DBlk\">", 0, count);
int endIndex = Html.IndexOf("<div id=\"SideBar\">", 0);
Html = Html.Substring(starIndex, endIndex - starIndex); try
{
#region 得到今天的天气 //得到今天的标识跟城市
int firstDayAndCityStartIndex = Html.IndexOf("<h3>", 0);
int firstDayAndCityEndIndex = Html.IndexOf("</h3>", 0);
string FirstDayAndCity = Html.Substring(firstDayAndCityStartIndex + 4, firstDayAndCityEndIndex - firstDayAndCityStartIndex - 4); //得到今天的日期跟星期
int firstDateStartIndex = Html.IndexOf("<p>", firstDayAndCityEndIndex);
int firstDateEndIndex = Html.IndexOf("</p>", firstDayAndCityEndIndex);
string FirstDate = Html.Substring(firstDateStartIndex + 3, firstDateEndIndex - firstDateStartIndex - 3).Replace(" ", "，"); //得到今天的天气
int firstWeatherStartIndex = Html.IndexOf("<div class=\"Weather_TP\">", firstDateEndIndex);
int firstWeatherEndIndex = Html.IndexOf(" ", firstWeatherStartIndex + 24);
string FirstWeather = Html.Substring(firstWeatherStartIndex + 24, firstWeatherEndIndex - firstWeatherStartIndex - 24); //得到今天的温度 int firstTemperatureStartIndex = firstWeatherEndIndex + 1;
int firstTemperatureEndIndex = Html.IndexOf("</div>", firstTemperatureStartIndex);
string FirstTemperature = Html.Substring(firstTemperatureStartIndex, firstTemperatureEndIndex - firstTemperatureStartIndex);
int int1 = FirstTemperature.IndexOf("℃", 0);
int int2 = FirstTemperature.IndexOf("～", 0);
int int3 = FirstTemperature.IndexOf("℃", int2);
string FirstMinTemperature = FirstTemperature.Substring(int2 + 1, int3 - int2);
string FirstMaxTemperature = FirstTemperature.Substring(0, int2 - int1 + 2); //得到今天的风力
int firstWindforceStartIndex = Html.IndexOf("风力：", firstTemperatureEndIndex);
int firstWindforceEndIndex = Html.IndexOf("</div>", firstWindforceStartIndex);
string FirstWindforce = Html.Substring(firstWindforceStartIndex + 3, firstWindforceEndIndex - firstWindforceStartIndex - 3); if (FirstWindforce.Contains("至"))
{ }
else if (FirstWindforce.Contains("<")) //判断风力是否含有"<"或"≤"字样将,如果有的话，将其替换为2-
{
string strWindforce = FirstWindforce.Substring(1, FirstWindforce.Length - 2);
int minWindforce = Int32.Parse(strWindforce) - 1;
FirstWindforce = FirstWindforce.Replace("<", minWindforce.ToString() + "-");
}
else if (FirstWindforce.Contains("≤"))
{
string strWindforce = FirstWindforce.Substring(1, FirstWindforce.Length - 2);
int minWindforce = Int32.Parse(strWindforce) - 1;
FirstWindforce = FirstWindforce.Replace("≤", minWindforce.ToString() + "-");
} #endregion #region 得到明天的天气 //得到明天的标识跟城市
int secondDayAndCityStartIndex = Html.IndexOf("<h3>", firstWindforceEndIndex);
int secondDayAndCityEndIndex = Html.IndexOf("</h3>", secondDayAndCityStartIndex);
string secondDayAndCity = Html.Substring(secondDayAndCityStartIndex + 4, secondDayAndCityEndIndex - secondDayAndCityStartIndex - 4); //得到明天的日期跟星期
int secondDateStartIndex = Html.IndexOf("<p>", secondDayAndCityEndIndex);
int secondDateEndIndex = Html.IndexOf("</p>", secondDateStartIndex);
string SecondDate = Html.Substring(secondDateStartIndex + 3, secondDateEndIndex - secondDateStartIndex - 3).Replace(" ", "，"); //得到明天的天气
int secondWeatherStartIndex = Html.IndexOf("<div class=\"Weather_TP\">", secondDateEndIndex);
int secondWeatherEndIndex = Html.IndexOf(" ", secondWeatherStartIndex + 24);
string SecondWeather = Html.Substring(secondWeatherStartIndex + 24, secondWeatherEndIndex - secondWeatherStartIndex - 24); //得到明天的温度 int secondTemperatureStartIndex = secondWeatherEndIndex + 1;
int secondTemperatureEndIndex = Html.IndexOf("</div>", secondTemperatureStartIndex);
string SecondTemperature = Html.Substring(secondTemperatureStartIndex, secondTemperatureEndIndex - secondTemperatureStartIndex);
int int4 = SecondTemperature.IndexOf("℃", 0);
int int5 = SecondTemperature.IndexOf("～", 0);
int int6 = SecondTemperature.IndexOf("℃", int2);
string SecondMinTemperature = SecondTemperature.Substring(int5 + 1, int6 - int5);
string SecondMaxTemperature = SecondTemperature.Substring(0, int5 - int4 + 2); //得到明天的风力
int secondWindforceStartIndex = Html.IndexOf("风力：", secondTemperatureEndIndex);
int secondWindforceEndIndex = Html.IndexOf("</div>", secondWindforceStartIndex);
string SecondWindforce = Html.Substring(secondWindforceStartIndex + 3, secondWindforceEndIndex - secondWindforceStartIndex - 3); if (SecondWindforce.Contains("至"))
{ }
else if (SecondWindforce.Contains("<")) //判断风力是否含有"<"或"≤"字样将,如果有的话，将其替换为2-
{
string strWindforce = SecondWindforce.Substring(1, FirstWindforce.Length - 2);
int minWindforce = Int32.Parse(strWindforce) - 1;
SecondWindforce = SecondWindforce.Replace("<", minWindforce.ToString() + "-");
}
else if (SecondWindforce.Contains("≤"))
{
string strWindforce = SecondWindforce.Substring(1, SecondWindforce.Length - 2);
int minWindforce = Int32.Parse(strWindforce) - 1;
SecondWindforce = SecondWindforce.Replace("≤", minWindforce.ToString() + "-");
} #endregion #region 得到后天的天气 //得到后天的标识跟城市
int thirdDayAndCityStartIndex = Html.IndexOf("<h3>", secondWindforceEndIndex);
int thirdDayAndCityEndIndex = Html.IndexOf("</h3>", thirdDayAndCityStartIndex);
string thirdDayAndCity = Html.Substring(thirdDayAndCityStartIndex + 4, thirdDayAndCityEndIndex - thirdDayAndCityStartIndex - 4); //得到后天的日期跟星期
int thirdDateStartIndex = Html.IndexOf("<p>", thirdDayAndCityEndIndex);
int thirdDateEndIndex = Html.IndexOf("</p>", thirdDateStartIndex);
string ThirdDate = Html.Substring(thirdDateStartIndex + 3, thirdDateEndIndex - thirdDateStartIndex - 3).Replace(" ", "，"); //得到后天的天气
int thirdWeatherStartIndex = Html.IndexOf("<div class=\"Weather_TP\">", thirdDateEndIndex);
int thirdWeatherEndIndex = Html.IndexOf(" ", thirdWeatherStartIndex + 24);
string ThirdWeather = Html.Substring(thirdWeatherStartIndex + 24, thirdWeatherEndIndex - thirdWeatherStartIndex - 24); //得到后天的温度 int thirdTemperatureStartIndex = thirdWeatherEndIndex + 1;
int thirdTemperatureEndIndex = Html.IndexOf("</div>", thirdTemperatureStartIndex);
string ThirdTemperature = Html.Substring(thirdTemperatureStartIndex, thirdTemperatureEndIndex - thirdTemperatureStartIndex);
int int7 = ThirdTemperature.IndexOf("℃", 0);
int int8 = ThirdTemperature.IndexOf("～", 0);
int int9 = ThirdTemperature.IndexOf("℃", int2);
string ThirdMinTemperature = ThirdTemperature.Substring(int8 + 1, int9 - int8);
string ThirdMaxTemperature = ThirdTemperature.Substring(0, int8 - int7 + 2); //得到后天的风力
int thirdWindforceStartIndex = Html.IndexOf("风力：", thirdTemperatureEndIndex);
int thirdWindforceEndIndex = Html.IndexOf("</div>", thirdWindforceStartIndex);
string ThirdWindforce = Html.Substring(thirdWindforceStartIndex + 3, thirdWindforceEndIndex - thirdWindforceStartIndex - 3); if (ThirdWindforce.Contains("至"))
{ }
else if (ThirdWindforce.Contains("<")) //判断风力是否含有"<"或"≤"字样将,如果有的话，将其替换为2-
{
string strWindforce = ThirdWindforce.Substring(1, ThirdWindforce.Length - 2);
int minWindforce = Int32.Parse(strWindforce) - 1;
ThirdWindforce = ThirdWindforce.Replace("<", minWindforce.ToString() + "-");
}
else if (ThirdWindforce.Contains("≤"))
{
string strWindforce = ThirdWindforce.Substring(1, ThirdWindforce.Length - 2);
int minWindforce = Int32.Parse(strWindforce) - 1;
ThirdWindforce = ThirdWindforce.Replace("≤", minWindforce.ToString() + "-");
} #endregion
al.Add(FirstDayAndCity);
al.Add(FirstDate);
al.Add(FirstWeather);
al.Add(FirstMinTemperature);
al.Add(FirstMaxTemperature);
al.Add(FirstWindforce);
al.Add(secondDayAndCity);
al.Add(SecondDate);
al.Add(SecondWeather);
al.Add(SecondMinTemperature);
al.Add(SecondMaxTemperature);
al.Add(SecondWindforce); al.Add(thirdDayAndCity);
al.Add(ThirdDate);
al.Add(ThirdWeather);
al.Add(ThirdMinTemperature);
al.Add(ThirdMaxTemperature);
al.Add(ThirdWindforce);
}
catch (Exception err)
{ } return al;
}
特殊说明，使用第三种方法获取天气预报，输入城市的时候可能会受新浪提供的服务的影响，可能有些城市搜不到，前两种方法应该是不会受影响的。另外，由于代码写的比较急，所以难免代码的质量就会有些问题，还请大家多多包涵。单纯从代码上看，可能确实没有什么难度，可是如果在您的工作中如果因为我的代码为您节省了一些时间，笔者深感欣慰了。
另外，由于我的开发环境是vs2008+sp1，如果您的vs版本较低，不妨把项目文件删除掉，然后打开您的vs，选择打开网站，然后定位到本程序的目录，这样就可以进行代码的编译跟踪调试了。
再补充一点，有人可能对代码中出现的：System.Environment.NewLine 这句代码比较迷糊，因为这个是.net提供的简单的换行方法，我推荐大家以后能够使用这种.net提供给大家的高效、简便的方法。最关键的是它不容易出错。 (责任编辑：admin) | 
