我正在使用My.Computer.Filesystem.WriteAllBytes将存储在我的应用程序资源中的可执行文件写出到它的启动目录中。运行可执行文件后,我将其删除。一切工作正常;然而,我会无缘无故地得到一个UnauthorizedAccessException。得到例外之后,我可以手动删除文件而没有任何问题。下面是完整的代码: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
什么困扰我的是,我从字面上只是写出来的可执行文件,并没有别的也可能会被使用。我检查了文件属性,它不是只读的。我的应用程序也以管理员身份运行。可能是什么问题呢?
好啊,我不能相信我忽略了这一点。我用MAD.WaitForExit()替换了MAD.Close(),一切似乎都很好!谢谢! – Steven 2010-11-28 01:13:01