[VB.NET] Count a specific word in a text document?

[murderdoll]

Hello,

I want to count how many times a specific word has been repeated in a text document, what would be the best way to do that?

Thanks

[wrack]

Open the text document and then use Regular Expression matching and then get the count of the matching instances.

Edited June 16, 2009 by wrack

[Andre S. Veteran]

EDIT: nvm my first example with a linq expression, it was way too inefficient.

As wrack says, the best way is to use Regex.

Imports System.IO
Imports System.Text.RegularExpressions

Module Module1

	Sub Main()
		Dim text = File.ReadAllText("G:\USER\Documents\MyFile.log")
		Dim count = Regex.Matches(text, "a_word").Count
		Console.WriteLine(count)
		Console.ReadKey()
	End Sub

End Module

This code first stores the contents of MyFile.log as a string in "text". Then it counts the number of occurences of "a_word" in it.

Edited June 16, 2009 by Dr_Asik

[Andre S. Veteran]

Actually, for even better efficiency, you should use a StreamReader instead of File.ReadAllText().

Using tr As TextReader = New StreamReader("G:\USER\Documents\MyFile.log")
	 count = Regex.Matches(tr.ReadToEnd(), "a_word").Count
End Using

[wrack]

Yeah Dr_Asik got it. Sorry I didn't post an example as I was typing that from my pda and I still am. I was just hoping that pointing you to a direction should help :)

[murderdoll]

Thanks a lot for the example Dr_Asik, cleared a lot for me. :)