Nested Loop Not Working vb.net - vb.net

Question

I am trying to read file names from source directory and then read a separate file to rename and move files to target directory. Below code reads the file names but the problem is it only reading the contents of app.ini file only once i.e. for first file name. Code is not looping app.ini as soon as for loops switches to second file name.
Dim di As New IO.DirectoryInfo("D:\Transcend")
Dim diar1 As IO.FileInfo() = di.GetFiles()
Dim dra As IO.FileInfo
If (di.GetFiles.Count > 0) Then
Dim a As Integer = 1
Dim b As Integer = 1
For Each dra In diar1
ComboBox1.Items.Add(dra.FullName.ToString)
Using reader2 As New IO.StreamReader("D:\Transcend\test\app.ini")
Do While reader2.Peek() >= 0
Dim line2 = reader2.ReadLine
Do Until line2 Is Nothing
'line2 = reader2.ReadLine()
'ComboBox1.Items.Add(line2.ToString)
'Label1.Text = line2
If line2 <> Nothing Then
If line2.Contains("filename" + a.ToString) Then
Dim values() As String = line2.Split(CChar(":")).ToArray
Dim values2() As String = values(1).Split(CChar(";")).ToArray() 'full filename
Dim values3() As String = values(2).Split(CChar(";")).ToArray() 'keyword to be replaced in filename
Dim values4() As String = values(3).Split(CChar(";")).ToArray() 'fullname in place of keyword
Dim values5() As String = values(4).Split(CChar(";")).ToArray 'destination drive letter
Dim values6() As String = values(5).Split(CChar(";")).ToArray 'destination path after drive letter
ComboBox1.Items.Add(values2(0))
ComboBox1.Items.Add(values3(0))
ComboBox1.Items.Add(values4(0))
ComboBox1.Items.Add(values5(0) + ":" + values6(0))
'Label1.Text = dra.Name.ToString
If dra.Name.ToString.Contains(values2(0)) Then
Dim n As String = dra.Name.Replace(values3(0), values4(0))
File.Copy(dra.FullName, values5(0) + ":" + values6(0) + n)
End If
End If
End If
Exit Do
Loop
a = a + 1
Loop
reader2.Close()
End Using
b = b + 1
Next
Label1.Text = b
Else
MsgBox("No files!")
End
End If
ouput image:
Above image is to show the output and error, first line is the filename1 and the next 8 lines are the output of the app.ini file. As you can see as soon as the filename1 changes to the next file name i.e. Autorun.inf in the 9th line of the above image the same 8 lines of app.ini(line 2nd to 9th in the above image) should be reiterated after Autorun.inf file name but app.ini is not getting to read after file name increments to Autorun.inf and then to FreeSoftware(JF).htm.

Answer 1

The only difference between the first and the second file are the a and b values.
On the first run a will start from 1 and it will be incremented for each line in the app.ini file. After reading 8 lines, the final value of a will be 9.
For the second file, the value a isn't reset so it's value will still be 9. This means that the following condition will never be true because the first run only found value from 1 to 8 *.
If line2.Contains("filename" + a.ToString) Then
To fix your issue, you must set the a variable value back to 1 between each file:
Using reader2 As New IO.StreamReader("D:\Transcend\test\app.ini")
a = 1
Do While reader2.Peek() >= 0
* I'm assuming that the filename in your .ini file are sorted (i.e. line containing filename9 isn't listed before filename2) and that no external process changed the content of your .ini file between the first and the second file.