Click here to Skip to main content
Click here to Skip to main content

Weather Forecast with Yahoo! Weather RSS Feed

By , 13 Jul 2009
Rate this:
Please Sign up or sign in to vote.

Screenshot - Weather_forecast.jpg

Introduction

Every time I wanted to use a weather forecast for my site, I found it too confusing. Each method I found had problems - some of the weather forecast Web services did not work properly. Eventually I noticed that Yahoo! has an RSS for its weather forecast. I decided to make a program to use that in my site and I created a class for it! I hope it will be useful for others who want to have weather forecasts in their programs.

Yahoo! Weather RSS feed

The Yahoo! Weather RSS feed enables you to get up-to-date weather information for your location. You can save this feed in My Yahoo! or your favorite feed aggregate. You can also incorporate the RSS data into your own Web site or client application. The Yahoo! Weather RSS feed is a dynamically-generated feed that is based on zip code or Location ID.

RSS Request

The Yahoo! Weather RSS feed request follows simple HTTP GET syntax: start with a base URL and then add parameters and values after a question mark (?). Multiple parameters are separated by an ampersand (&). There are two parameters for Weather RSS:

  • p for location
  • u for degrees units (Fahrenheit or Celsius)

RSS Response

The Yahoo! Weather RSS feed is an XML document that conforms to RSS 2.0 specifications. RSS is an XML document containing: a single channel element representing the feed, several elements containing metadata about the feed itself, and one or more item elements describing individual items within the feed. You can find all information about these elements on the Yahoo Developer page here. As it is represented in an XML document, we can convert it to classes by XML Serialization in .NET.

Understanding XML Serialization in the .NET Framework

XML Serialization enables you to convert common language runtime objects into XML documents or streams, and vise versa. XML Serialization makes it possible to convert XML documents into such a meaningful format that all programming languages can process the converted documents without any difficulty. You don't need to know much about XML Serialization to use this code, but it can help you to change or customize it yourself.

Using the Code

Using this code is as simple as making an instance of it and then sending its required parameters (Yahoo! Weather RSS parameters) to its constructor. The first parameter is US zip code or Location ID. The second one is Units for temperature. Send "f" for Fahrenheit or "c" for Celsius and then you can use it! Like this:

'//For example we send "IRXX0018" for Location ID of Tehran, and we want 
'//Units for temperature as Fahrenheit
 Dim t As New YahooWeatherForecast("IRXX0018", "f")
 Response.Write(t.rss.channel.item.description)
 Response.Write(t.rss.channel.item.forecast.high)
 Response.Write(t.rss.channel.item.forecast.low)

History

  • 25th April, 2007: Initial post
  • 15th May, 2007 - Updated source file
  • 3rd May, 2008: Updated source file

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

Farhad Siasar Djahantighi 2

Iran (Islamic Republic Of) Iran (Islamic Republic Of)
No Biography provided

Comments and Discussions

 
QuestionI got a Ctype Error in VWD 2008 Express. What's wrong with the CType? Pinmembercslamsg23-Oct-08 22:52 
GeneralYahoo! Weather mashup PinmembervirtuPIC12-May-08 20:21 
General"Error in XML Document" Pinmembersayeo872-May-08 5:07 
GeneralRe: "Error in XML Document" PinmemberDan Suthar2-May-08 22:56 
GeneralRe: "Error in XML Document" Pinmemberarashk12-May-08 22:58 
GeneralRe: "Error in XML Document" PinmemberMCofer11-May-08 8:30 
GeneralRe: "Error in XML Document" PinmemberMCofer11-May-08 10:20 
GeneralRe: "Error in XML Document" ...the fix Pinmemberrspercy609-Jul-09 11:52 
GeneralInput string was not in a correct format Pinmembersuresh00820-Mar-08 18:33 
GeneralRe: Input string was not in a correct format Pinmemberarashk123-Mar-08 21:45 
GeneralMulti Day Forecast Pinmemberbuster9526-Feb-08 16:52 
AnswerRe: Multi Day Forecast Pinmemberfranzil8-May-08 2:19 
GeneralYahoo URL has changed to http://weather.yahooapis.com/forecastrss Pinmembermichael knopf14-Feb-08 4:12 
GeneralVB Express 2005 PinmemberSteve_5523-Oct-07 7:21 
QuestionHow to change the language to Chinese ? Pinmembertpang1328-Aug-07 0:37 
GeneralAstronomy Class Pinmemberkfwbird26-Jul-07 13:45 
AnswerRe: Astronomy Class Pinmemberarashk127-Jul-07 9:30 
GeneralRe: Astronomy Class Pinmemberkfwbird30-Jul-07 10:57 
QuestionPictures Pinmemberosilala2-Jul-07 6:46 
AnswerRe: Pictures Pinmemberrspercy6010-Jul-09 13:13 
AnswerRe: Pictures PinmemberFarhad Siasar Djahantighi10-Jul-09 18:53 
GeneralUnable to connect to the remote server PinmemberCuu22-May-07 13:26 
GeneralRe: Unable to connect to the remote server Pinmemberarashk122-May-07 18:55 
GeneralRe: Unable to connect to the remote server PinmemberCuu23-May-07 5:06 
GeneralRe: Unable to connect to the remote server PinmemberJap Santi29-May-07 18:07 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web03 | 2.8.140421.2 | Last Updated 13 Jul 2009
Article Copyright 2007 by Farhad Siasar Djahantighi 2
Everything else Copyright © CodeProject, 1999-2014
Terms of Use
Layout: fixed | fluid