File uploading, file used by another process.

you can get the file in readonly mode

How to do so???

http://www.devx.com/vb2themax/Tip/18844

Where in this article do you see how to make a file read-only?

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Uploading a file on the server
Uploading a file from the client to the server is very straightforward with ASP.NET. Just use the <input type="file" runat="server"> tag and its wrapper class HtmlInputFile. Here's how you define the control on the page:

<form runat="server" enctype="multipart/form-data">
  Select a file to upload:<br>
  <input type="file" runat="server" ID="Uploader">
  <input type="button" runat="server" ID="Upload" value="Upload"
    OnServerClick="Upload_Click">
</form>

And here's the code you write in the code-behind file (or in the page's <script> section) to handle the button's Click event:

Sub Upload_Click(ByVal sender As Object, ByVal e As EventArgs)
    If Not Uploader.PostedFile Is Nothing Then
        Try
            ' retrieve the destination dir path
            Dim destDir As String = Server.MapPath("./Upload")
            ' extract the filename part from the full path of the posted file
            Dim fileName As String = System.IO.Path.GetFileName _
                (Uploader.PostedFile.FileName)
            ' combine the destination directory with the filename
            Dim destPath As String = System.IO.Path.Combine(destDir, fileName)
            ' save the file on the server
            Uploader.PostedFile.SaveAs(destPath)
            Response.Write("Thanks for submitting your file")
        Catch exc As Exception
            Response.Write(exc.Message)
        End Try
End Sub

Note that in order to handle the uploading of a file, the form must have the enctype attribute set to multipart/form-data, as you see above. Also note that by default the maximum size of the uploaded file is 4MB. If you try to upload a bigger size you'll get a runtime error. You may want to increase this value, for example because you have ZIP, AVI or MP3 files bigger than 4MB. To do so, set the maxRequestLength attribute of the <httpRuntime> setting in the application's web.config file. The size is specified in KB, so <httpRuntime maxRequestLength="8192" /> sets the maximum file size on 8MB.
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END OF ARTICLE

That is how I have it set up in my page. The problem is when I try to upload a certain file "Oracle.DataAccess.dll" I get the error:

Uploading Error System.IO.IOException: The process cannot access the file "C:\Packages\DataLoader\Data Files\Oracle.DataAccess.dll" because it is being used by another process.

Is there a way around this?

I got the fix for it.

Here we go.

START CODING SNIPET
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Private Sub WaitForExclusiveAccess(ByVal strFileName As String)

        Dim intIntervalCounter As Integer = 0

        ' This will keep trying to access the wanted file until
        ' it is finally accessible to the upload control
        While True

            Try

                ' Add to the interval counter
                intIntervalCounter += 1

                If (intIntervalCounter = 10) Then
                    ' Looping endlessly so we want to exit
                    Exit Sub
                End If

                Dim oFileStream As New FileStream(strFileName, FileMode.Append, FileAccess.Write, FileShare.None)
                oFileStream.Close()
                Exit Sub

            Catch ex As Exception
                Thread.Sleep(1000)
            End Try

        End While

    End Sub
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END CODING SNIPET

Thanks for the replies