Problem Copying SQL DB File

Nov 2, 2006

Hi,

I have a VB project which uses SQL Server 2005 Express. When the project first runs, it copies its DB files from the data directory to a directory created on the C: drive. This works fine.

In a later part of the application, it is necessary to copy the DB file to another location e.g. memory stick so that it can be used to merge data onto another PC running the same application.

The data merging works too.

My problem is, despite the fact that it worked okay this morning, I am now unable to copy the DB into a second location (memory stick or location on local disc). I get an exception stating that the file is in use.

I have no other applications running (I shut down Visual Studio and was running the installed version).

What is more, the form that implements the file copying, first closes down all other forms in the application to ensure that nothing is connected to the DB.

Furthermore, the form that performs this task has no DB connections whatsoever - it simply allows the user to select a location, then creates a directory and copies the DB files to it.

If I copy/paste the code plus the FolderBrowserDialog into the first form that copies the original database out of the data directory - it works!

The code for the whole form is below - I would be hugely grateful for any ideas ...

 

Public Class Export

Private Sub Export_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

End Sub

Private Sub NextBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NextBtn.Click

'Close all other windows to ensure that the databases are not in use.

Dim Counter As Integer = My.Application.OpenForms.Count

Do While Counter > 1

For Each f As Form In My.Application.OpenForms

If Not (f.GetType Is GetType(Export)) Then

f.Close()

Exit For

End If

Next

Counter -= 1

Loop

 

' Set the Help text description for the FolderBrowserDialog.

Me.FolderBrowserDialog.Description = _

"Select a location to export the data to e.g. a memory stick. Or, you can export to a local directory and then burn to CD or e-mail to another user."

' Do not allow the user to create New files via the FolderBrowserDialog.

Me.FolderBrowserDialog.ShowNewFolderButton = False

' Default to the My Documents folder.

Me.FolderBrowserDialog.RootFolder = Environment.SpecialFolder.MyComputer

 

Dim result As DialogResult = FolderBrowserDialog.ShowDialog()

Dim foldername As String

If result = DialogResult.OK Then

foldername = FolderBrowserDialog.SelectedPath

Try

If Not My.Computer.FileSystem.DirectoryExists(foldername & "ClubSecExportMerge") Then

My.Computer.FileSystem.CreateDirectory(foldername & "ClubSecExportMerge")

MsgBox("Merge Directory created.")

End If

My.Computer.FileSystem.CopyFile("C:ClubsecClubSecDB.mdf", foldername & "ClubsecExportMergeMergeDB.mdf", True)

My.Computer.FileSystem.CopyFile("C:ClubsecClubSecDB_log.ldf", foldername & "ClubsecExportMergeMergeDB_log.ldf", True)

MsgBox("Database merge files successfully copied to " & foldername & " ClubSecExportMerge.", MsgBoxStyle.OkOnly, "Operation successful")

 

Catch ex As Exception

MsgBox("There was an error." & Chr(13) & "Export of database was not achieved." & Chr(13) & ex.ToString, MsgBoxStyle.OkOnly, "Operation failed.")

Exit Sub

End Try

Else ' Cancel button pressed

MsgBox("No path selected. Data not exported", MsgBoxStyle.OkOnly, "Operation cancelled.")

End If

Dim home As New HomeScreen

home.Show()

Me.Close()

End Sub



End Class

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