我正在使用My.Computer.Filesystem.WriteAllBytes將存儲在我的應用程序資源中的可執行文件寫出到它的啓動目錄中。運行可執行文件後,我將其刪除。一切工作正常;然而,我會無緣無故地得到一個UnauthorizedAccessException。得到例外之後,我可以手動刪除文件而沒有任何問題。下面是完整的代碼:IO.File.Delete Random UnauthorizedAccessException
' Convert MP3
' First, copy out converter
Dim Path = New IO.FileInfo(SoundPath)
Try
My.Computer.FileSystem.WriteAllBytes(Application.StartupPath + "\converter.exe", My.Resources.madplay, False)
Catch ex As Exception
MessageBox.Show(ex.ToString, "Report", MessageBoxButtons.OK)
Exit Sub
End Try
' Set up process
Dim MAD As New Process
' Set process info
Dim output As String = IO.Path.GetFileNameWithoutExtension(Path.FullName) + ".wav"
Dim input As String = Path.FullName
Dim adjust As String = barVolumeAdjust.Value.ToString
Dim hz As String = "15000"
With (MAD.StartInfo)
.FileName = Application.StartupPath + "\converter.exe"
.Arguments = "-v -a " + adjust + " -R " + hz + " -o """ + output + """ """ + input + """"
.UseShellExecute = False
.RedirectStandardInput = True
.RedirectStandardError = True
.RedirectStandardOutput = True
.CreateNoWindow = True
End With
' Start
MAD.Start()
' Update title with output
Dim Line As String = MAD.StandardError.ReadLine
While Not Line Is Nothing
Me.Text = Line
Line = MAD.StandardError.ReadLine
End While
' Stop
MAD.Close()
' Delete MAD
Try
IO.File.Delete(Application.StartupPath + "\converter.exe")
Catch ex As Exception
MessageBox.Show(ex.ToString, "Report", MessageBoxButtons.OK)
End Try
什麼困擾我的是,我從字面上只是寫出來的可執行文件,並沒有別的也可能會被使用。我檢查了文件屬性,它不是隻讀的。我的應用程序也以管理員身份運行。可能是什麼問題呢?
好啊,我不能相信我忽略了這一點。我用MAD.WaitForExit()替換了MAD.Close(),一切似乎都很好!謝謝! – Steven 2010-11-28 01:13:01