ASP.NET realizes weather forecast.

Use the system. Data;

Use the system. Configuration;

Use the system. Web

Use the system. Network security;

Use the system. Web . UI

Use the system. Web . UI.WebControls

Use the system. web . ui . web controls . web parts；

Use the system. Web . UI.HtmlControls

Use the system. Data . SqlClient

Use System.Net;

Use the system. Io;

Use the system. Collection;

///& lt； Summary & gt

///A brief description of the weather

///& lt； /summary & gt；

Public weather

{

Public weather ()

{

//

// TODO: Add constructor logic here.

//

}

Public static string ConvertCodeByCity (string city)

{

String code = "";

Switch (city)

{

Case "Beijing":

code = " 1 10 100 "；

Break;

Default value:

Break;

}

Return code;

}

Public static array list GetWeather (string code)

{

/*

[0] "Beijing" string

[1] "Thunderstorm" string

[2] "9℃" string

[3] "29℃" string

[4] "Below Level 3" string

*/

String html =

attempt

{

HttpWebRequest request = (HttpWebRequest)WebRequest. create("/iframe/weather/"+code+" _ w . html ")；

Request. Method = " Get

//request. Timeout =1;

Request. content type = " application/x-www-form-urlencoded "；

WebResponse response = request. GetResponse()；

Stream s = response. GetResponseStream()；

StreamReader sr = new StreamReader(s, system. text . encoding . get encoding(" GB 23 12 ")；

html = Sr . ReadToEnd()；

South close ();

Sr . Close()；

}

Catch (exception error)

{

Thrownnewexception ("Error accessing address ~ ~ ~);

}

int count = html。 Length;

int starIndex = html。 index of(" & lt； Table ",0, count);

int endIndex = html。 index of(" & lt； /table >，starIndex，count-star index)；

html = html。 Substring(starIndex，end index-starIndex+8)；

//Get the city

int cityStartIndex = html。 index of(" & lt； b >； ，0，html。 Length);

int cityEndIndex = html。 index of(" & lt； /b & gt； ，0，html。 Length);

String City = html. Substring(cityStartIndex + 3，city endindex-city startindex-3)；

//Get the weather

int weatherStartIndex = html。 index of(" & lt； b >； ，city endindex)；

int weatherEndIndex = html。 index of(" & lt； /b & gt； ，weatherStartIndex)；

The string Weather = html. Substring(weatherStartIndex + 3，weather endindex-weather startindex-3)；

//Get the temperature

int temperatureStartIndex = html。 index of(" & lt； b”，weather endindex)；

int temperatureEndIndex = html。 index of(" & lt； /b & gt； ，weather endindex+3)；

String temperature = html. substring(temperature startindex+2 1，temperature endindex-temperature startindex-2 1)；

Int int 1 = temperature. IndexOf("℃"，0)；

Int int2 = temperature. IndexOf("~ "，0)；

Int int3 = temperature. IndexOf("℃"，int 2)；

String MinTemperature = temperature. Substring (int2+1, int 3-int 2);

String MaxTemperature = temperature. Substring (0, int 2-int1+2);

//Obtain wind power generation.

int wind force startindex = html . index of(" wind:"，temperature endindex)；

int windforceEndIndex = html。 index of(" & lt； br >； ，windforceStartIndex)；

string Windforce = html。 substring(windforceStartIndex+3，windforcendex-windforceStartIndex-3)；

If (the wind. Contains ("less than")&; & amp(! Wind power. Contains(" equal to "))////Judge whether the wind force contains the words "less than" or "less than or equal to" and replace it with 2-

{

//Windforce = wind force. Replace ("less than", "2-);

string strWindforce = Windforce。 Substring (2, Windforce. Length-3);

int minWindforce = Int32。 parse(strWindforce)- 1；

Wind power = wind power. Replace ("less than", minWindforce. ToString()+"-"；

}

Else if (Windforce。 Contain ("less than or equal to"))

{

string strWindforce = Windforce。 Substring (4, Windforce. Length-5);

int minWindforce = Int32。 parse(strWindforce)- 1；

Wind power = wind power. Replace ("less than or equal to", minWindforce. ToString()+"-"；

}

ArrayList al = new ArrayList()；

Al. Add (city);

Al. Add (weather);

Al. Add (minimum temperature);

Al. add(MaxTemperature)；

Al. add(wind force)；

Return to al;

}

}