How can I get hourly weather forecast in VB.net? - vb.net

Question

I've seen some questions similar to this on here, but none of them seem to help me. I don't really care what API is used, be it Google, Yahoo!, The Weather Channel, or any other. I've got code that will get the high and low of the current day, based on the location given by the user, but I can't seem to get the hourly predictions for temperature or weather condition, which is what I'm really looking for. I don't really care for wind speeds, humidity, or the "feels like" temperature, though I'll add them if I can figure out how to. I'm trying to get data that will look something like what is here. (www.weather.com/...)
I'm pretty new to parsing XML so that may be part of my problem, too. Thanks in advance for any help. I greatly appreciate it.

Answer 1

I have something you might enjoy:
<Runtime.CompilerServices.Extension()>
Module Weather
Public Structure WeatherInfo_Forecast
Dim DayOfWeek As String
Dim low As Double
Dim high As Double
Dim icon As String
End Structure
Public Structure WeatherInfo_Wind
Dim direction As String
Dim speed As Double
Dim unit As String
End Structure
Public Structure WeatherInfo_Typed
Dim Failed As Boolean
Dim errormessage As Exception
Dim location As String
Dim forcast_date As DateTime
Dim checked_time_date As DateTime
Dim humidity As Double
Dim highf As Double
Dim lowf As Double
Dim highc As Double
Dim lowc As Double
Dim currenttempC As Double
Dim currenttempF As Double
Dim predicted_icon As String
Dim current_icon As String
Dim current_condition As String
Dim predicted_condition As IEnumerable(Of WeatherInfo_Forecast)
Dim wind_condition As WeatherInfo_Wind
Dim day As String
End Structure
<Runtime.CompilerServices.Extension()> _
Public Function ToC(ByVal F As Double) As Double
Return ((F - 32) / 9) * 5
End Function
<Runtime.CompilerServices.Extension()> _
Public Function TryParseAsDouble(ByVal s As String) As Double
Dim rv As Double
If Double.TryParse(s, rv) = False Then rv = Double.NaN
Return rv
End Function
<Runtime.CompilerServices.Extension()> _
Public Function TryParseAsDate(ByVal s As String) As DateTime
Dim rv As DateTime
If DateTime.TryParse(s, rv) = False Then rv = Nothing
Return rv
End Function
Private Function ParseHumidity(ByVal s As String) As Double
If Not s Is Nothing Then
Dim humRegEx As New System.Text.RegularExpressions.Regex("Humidity: (?<Value>\d+)\w*\%")
Dim m = humRegEx.Match(s)
If m.Length = 0 Then Return Double.NaN
Return Double.Parse(m.Groups("Value").Value)
End If
End Function
Private Function ParseWind(ByVal s As String) As WeatherInfo_Wind
Dim rv As New WeatherInfo_Wind
If Not s Is Nothing Then
Dim humRegEx As New System.Text.RegularExpressions.Regex("Wind\:\s+(?<Direction>[NEWSnews]{1,2})\s+at\s+(?<speed>(?<value>\d+)\s(?<units>\w+)){1}")
Dim m = humRegEx.Match(s)
rv.speed = Double.NaN
If m.Length = 0 Then Return rv
With rv
.direction = m.Groups("Direction").Value
If Double.TryParse(m.Groups("value").Value, .speed) = False Then .speed = Double.NaN
.unit = m.Groups("units").Value
End With
End If
Return rv
End Function
<DebuggerHidden()>
Public Function Grab_Weather(ByVal Location As String) As WeatherInfo_Typed
Dim GrabWeather As New WeatherInfo_Typed
With GrabWeather
.Failed = True
Try
Dim xml As XDocument = XDocument.Load("http://www.google.com/ig/api?weather=" & Location)
Dim xp = xml.<problem_cause>
If xp.Any Then Return GrabWeather
.location = xml...<city>.#data
.forcast_date = xml...<forecast_date>.#data.TryParseAsDate
.checked_time_date = xml...<current_date_time>.#data.TryParseAsDate
.humidity = ParseHumidity(xml...<humidity>.#data)
.highf = xml...<high>.#data.TryParseAsDouble
.lowf = xml...<low>.#data.TryParseAsDouble
.highc = GrabWeather.highf.ToC
.lowc = GrabWeather.highc.ToC
.currenttempC = xml...<temp_c>.#data.TryParseAsDouble
.currenttempF = xml...<temp_f>.#data.TryParseAsDouble
'.current_icon = "http://www.google.com" & xml...<icon>.#data
'.predicted_icon = "http://www.google.com" & xml...<high>.#data
.current_condition = xml...<condition>.#data
.predicted_condition = From f In xml...<forecast_conditions> _
Select New WeatherInfo_Forecast With { _
.DayOfWeek = f.<day_of_week>.Value, _
.high = f.<high>.#data.TryParseAsDouble, _
.low = f.<low>.#data.TryParseAsDouble}
'.icon = "http://www.google.com" & f.<icon>.#data}
.wind_condition = ParseWind(xml...<wind_condition>.#data)
.day = xml...<day_of_week>.#data
.Failed = False
Return GrabWeather
Catch ex As Exception
.errormessage = ex
Return GrabWeather
End Try
End With
End Function
End Module

Answer 2

I finally found what I was looking for from Weather Underground. They have three APIs, and, starting with the middle one, gives hourly forecasts for 36 hours. You get English and Metric predicted statistics for temperature, "feels like" temperature, dew point, wind speed, and wind direction. There's also wind chill and heat index, but every result for both in English and Metric was -9998, so I'm pretty sure those results are a bit off! Also there are qpf, snow, pop, and mslp. Unfortunately qpf and snow have not results and I'm not sure what pop and mslp are. All results are available in JSON and XML. They have some image requests, too, but I haven't looked into them yet.
Update:
Link Updated