Question

(VB.NET, .NET 3.5)

I wrote the following function to read some text from txt file. It was working fine but now it’s not. It keeps giving me this error message

‘IOException was unhandled’ and

‘ The process cannot access the file ‘F:\kh_matt\ch1.txt’ because it is being used by another process.’

The ch1.txt is not even opened or being used by any program at all. I tried to move ch1.txt to another location (Drive D) still I got the same message error but just different location it says The process cannot access the file ‘D:\ch1.txt’ because it is being used by another process.’

Here’s my code block :

Private Sub btnRead_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRead.Click

    Dim reader As StreamReader     Dim filelocation As String      filelocation = 'F:\kh_matt\ch1.txt'     Dim chid As Integer      chid = 1       If System.IO.File.Exists(filelocation) = True Then         reader = New StreamReader(New FileStream(filelocation, FileMode.Open))     Else         MsgBox(filelocation, MsgBoxStyle.OkOnly)     End If      Dim MyStream As New StreamReader(Path.Combine(Application.StartupPath, filelocation))     Dim vArray() As String = MyStream.ReadToEnd.Split(CChar('$'))     MyStream.Close()       Dim count As Integer      For d As Integer = 0 To vArray.Length - 1 Step 1          If d = vArray.Length - 1 Then             Exit For         End If          InsertKh(chid, d + 1, vArray(d))         count = d + 1     Next       MsgBox('Done Inserting') End Sub 

It always points to this code :

Dim MyStream As New StreamReader(Path.Combine(Application.StartupPath, filelocation))

Where I debug and press the respective button. Can anyone point out what the problem is ? Thanks

Answer 1

It seems you open the file twice, which is probably what’s causing your error:

reader = New StreamReader(New FileStream(filelocation, FileMode.Open)) ... Dim MyStream As New StreamReader(Path.Combine(Application.StartupPath, filelocation)) 

Are you sure that’s what you intend to do? It looks like you can remove MyStream and use reader instead. Also, you don’t have to use Path.Combine, since filelocation is not relative.