How to resolve the algorithm Web scraping step by step in the Visual Basic .NET programming language
Published on 12 May 2024 09:40 PM
How to resolve the algorithm Web scraping step by step in the Visual Basic .NET programming language
Table of Contents
Problem Statement
Create a program that downloads the time from this URL: http://tycho.usno.navy.mil/cgi-bin/timer.pl and then prints the current UTC time by extracting just the UTC time from the web page's HTML. Alternatively, if the above url is not working, grab the first date/time off this page's talk page.
If possible, only use libraries that come at no extra monetary cost with the programming language and that are widely available and popular such as CPAN for Perl or Boost for C++.
Let's start with the solution:
Step by Step solution about How to resolve the algorithm Web scraping step by step in the Visual Basic .NET programming language
Source code in the visual programming language
Imports System.Net
Imports System.IO
Dim client As WebClient = New WebClient()
Dim content As String = client.DownloadString("http://tycho.usno.navy.mil/cgi-bin/timer.pl")
Dim sr As New StringReader(content)
While sr.peek <> -1
Dim s As String = sr.ReadLine
If s.Contains("UTC") Then
Dim time As String() = s.Substring(4).Split(vbTab)
Console.WriteLine(time(0))
End If
End While
Imports System.Net
Dim client As WebClient = New WebClient()
Dim content As String = client.DownloadString("http://tycho.usno.navy.mil/cgi-bin/timer.pl")
Dim lines() As String = Split(content, vbLf) 'may need vbCrLf
For Each line In lines
If line.Contains("UTC") Then
Dim time As String() = line.Substring(4).Split(vbTab)
Console.WriteLine(time(0))
End If
Next
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