Weather forecast webservice code

<% @ WebService Language = "c #" Class = "WeatherWS. GetChinaWeather" %>
Using System;
Using System. Collections;
Using System. ComponentModel;
Using System. Data;
Using System. Diagnostics;
Using System. Net;
Using System. Text;
Using System. IO;
Using System. Web;
Using System. Web. Services;

Namespace WeatherWS
{
/// <Summary>
/// Summary of GetChinaWeather.
/// </Summary>
[WebService (Namespace = "http://flying.redv.com/monster")]
Public class GetChinaWeather: System. Web. Services. WebService
{
Public GetChinaWeather ()
{
// CODEGEN: This call is required by the ASP. NET Web service designer.
InitializeComponent ();
}

# Code generated by the region component designer

// Required by the Web Service designer
Private IContainer components = null;

/// <Summary>
/// The designer supports the required methods-do not use the code editor to modify
/// Content of this method.
/// </Summary>
Private void InitializeComponent ()
{
}

/// <Summary>
/// Clear all resources in use.
/// </Summary>
Protected override void Dispose (bool disposing)
{
If (disposing & components! = Null)
{
Components. Dispose ();
}
Base. Dispose (disposing );
}

# Endregion

[WebMethod (Description = "Weather Forecasting Service for cities (counties) in China, which can take a string of parameters (optional query method: · domestic cities (counties) full name · pinyin abbreviation · Telephone area code · zip code. If you want to query the weather conditions in Xuzhou, enter 'xuzhou 'or 'xization' as the parameter) ")]
Public DataSet getWeather (string strCity)
{
DataSet dsWeather = new DataSet ();
Try
{
Const int maxDay = 5;
String [] time = new string [maxDay]; // storage date, counted from today
String [] weather = new string [maxDay]; // Save the weather data
String [] max = new string [maxDay]; // stores the maximum temperature data.
String [] min = new string [maxDay]; // Save the minimum temperature data
String [] wind = new string [maxDay]; // save wind direction data

// Send a post request to the index. jsp page to obtain City Data
Uri uri = new Uri ("http://www.weathercn.com/forecastn/forcast/index.jsp? Searchname = "+ System. Web. HttpUtility. UrlEncode (strCity, System. Text. Encoding. GetEncoding (" GB2312 ")));
WebRequest wreq = WebRequest. Create (uri );

HttpWebResponse wresp = (HttpWebResponse) wreq. GetResponse ();

String HTML = "";

Stream s = wresp. GetResponseStream ();

StreamReader objReader = new StreamReader (s, System. Text. Encoding. Default );
HTML = objReader. ReadToEnd ();
If (HTML = null | HTML = "")
Return dsWeather;

HTML = HTML. ToLower (); // convert all to lower case
If (HTML = null | HTML = "")
Return dsWeather;
Int head, tail, I;
// If City data is not found, an empty dataset is returned.
Head = HTML. IndexOf ("query result:", 0 );
Head = HTML. IndexOf ("station_name =", head );
If (head =-1)
{
Return dsWeather;
}
Head = HTML. IndexOf ("station_name =", head + 1 );
Tail = HTML. IndexOf ("'", head );
String strCityData = HTML. Substring (head, tail-head); // obtain City Data
String href = "http://www.weathercn.com/forecastn/forcast/forecastDetail.jsp? "+ StrCityData;
// Query weather conditions based on City Data

Wreq = WebRequest. Create (href );
Wresp = (HttpWebResponse) wreq. GetResponse ();

HTML = "";
S = wresp. GetResponseStream ();

ObjReader = new StreamReader (s, System. Text. Encoding. Default );
HTML = objReader. ReadToEnd ();
If (HTML = null | HTML = "")
Return dsWeather;
HTML = HTML. ToLower (); // convert all to lower case

DateTime dtNow = new DateTime ();
DtNow = DateTime. Today; // obtain the current system date
DtNow = dtNow. Subtract (TimeSpan. Parse ("1 "));
For (I = 0; I <maxDay; I ++)
{
DtNow = dtNow. Add (TimeSpan. Parse ("1 "));
Time [I] = dtNow. tow.datestring (); // Date data
}

// Obtain weather data, total maxDay data
String date = DateTime. Now. Year. ToString () + "Year" + DateTime. Now. Month. ToString () + "Month"; // current Year
Head = HTML. IndexOf (date, 0 );
Head = HTML. IndexOf ("<tr>", head );
For (I = 0; I <maxDay; I ++)
{
Head = HTML. IndexOf ("<td", head );
Head = HTML. IndexOf ("Head = HTML. IndexOf ("/", head );
Head = HTML. IndexOf ("/", head + 1 );
Tail = HTML. IndexOf ("_", head );
Weather [I] = HTML. Substring (head + 1, tail-head-1 );
Head = HTML. IndexOf ("</td>", head );
}

// Obtain the temperature data of the last maxDay, including the maximum temperature and the minimum temperature.
For (I = 0; I <maxDay; I ++)
{
Head = HTML. IndexOf ("max", head );
Head = HTML. IndexOf (">", head );
Tail = HTML. IndexOf ("<", head );
Max [I] = HTML. Substring (head + 1, tail-head-1); // maximum temperature

Head = HTML. IndexOf ("min", head );
Head = HTML. IndexOf (">", head );
Tail = HTML. IndexOf ("<", head );
Min [I] = HTML. Substring (head + 1, tail-head-1); // minimum temperature
}

// Wind direction data for the last maxDay
Head = HTML. IndexOf ("<tr", head );
For (I = 0; I <maxDay; I ++)
{
Head = HTML. IndexOf ("class", head );
Head = HTML. IndexOf (">", head );
Tail = HTML. IndexOf ("<", head );
Wind [I] = HTML. Substring (head + 1, tail-head-1); // wind direction data
}

// Fill the data in DataSet
DataTable dtWeather = new DataTable ();
DtWeather. Columns. Add ("date ");
DtWeather. Columns. Add ("Weather ");
DtWeather. Columns. Add ("maximum temperature ");
DtWeather. Columns. Add ("minimum temperature ");
DtWeather. Columns. Add ("wind direction ");
For (I = 0; I <maxDay; I ++)
{
DataRow drWeather = dtWeather. NewRow ();
DrWeather ["date"] = time [I];
DrWeather ["weather"] = weather [I];
DrWeather ["maximum temperature"] = max [I];
DrWeather ["minimum temperature"] = min [I];
DrWeather ["wind direction"] = wind [I];
DtWeather. Rows. Add (drWeather );
}
DsWeather. Tables. Add (dtWeather );
DsWeather. AcceptChanges ();

Return dsWeather;

}
Catch (Exception e)
{
// DO Something
Return dsWeather;
}
}
}
}