Question

I want my program to read certain text in a text file. For example if I have a text file that contains the following info..

acc=blah
pass=hello

I want my vb.net application to get that the account variable is equal to blah, and the password variable is equal to hello.

Can anyone tell me how to do this?

Thanks

Answer 1

Here is a quick little bit of code that, after you click a button, will:

1. take an input file (in this case I created one called “test.ini”)
2. read in the values as separate lines
3. do a search, using regular expressions, to see if it contains any “ACC=” or “PASS=” parameters
4. then write them to the console

here is the code:

Imports System.IO
Imports System.Text.RegularExpressions

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim strFile As String = "Test.INI"
    Dim sr As New StreamReader(strFile)
    Dim InputString As String

    While sr.Peek <> -1
        InputString = sr.ReadLine()
        checkIfContains(InputString)
        InputString = String.Empty
    End While
    sr.Close()
End Sub

Private Sub checkIfContains(ByVal inputString As String)
    Dim outputFile As String = "testOutput.txt"
    Dim m As Match
    Dim m2 As Match
    Dim itemPattern As String = "acc=(\S+)"
    Dim itemPattern2 As String = "pass=(\S+)"

    m = Regex.Match(inputString, itemPattern, _
                    RegexOptions.IgnoreCase Or RegexOptions.Compiled)
    m2 = Regex.Match(inputString, itemPattern2, _
                    RegexOptions.IgnoreCase Or RegexOptions.Compiled)
    Do While m.Success
        Console.WriteLine("Found account {0}", _
                          m.Groups(1), m.Groups(1).Index)
        m = m.NextMatch()
    Loop
    Do While m2.Success
        Console.WriteLine("Found password {0}", _
                          m2.Groups(1), m2.Groups(1).Index)
        m2 = m2.NextMatch()
    Loop
End Sub

End Class