将 ProcessStartInfo.WorkingDirectory 设置为 UNC 路径
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【中文标题】将 ProcessStartInfo.WorkingDirectory 设置为 UNC 路径【英文标题】:Setting ProcessStartInfo.WorkingDirectory to an UNC Path 【发布时间】:2010-04-06 17:01:23 【问题描述】:我有一个在 VB.net 中编写的实用程序,它作为计划任务运行。它在内部调用另一个可执行文件,并且必须访问映射的驱动器。显然,Windows 在用户未登录时访问映射驱动器的计划任务存在问题,即使将身份验证凭据提供给任务本身也是如此。好的,好的。
为了解决这个问题,我刚刚将 UNC 路径传递给我的应用程序。
process.StartInfo.FileName = 'name of executable'
process.StartInfo.WorkingDirectory = '\\unc path\'
process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
process.StartInfo.Arguments = 'arguments to executable'
process.Start()
这与我对映射驱动器使用的实现相同,但是使用 UNC 路径时,进程的行为不像 UNC 路径是工作目录。
是否存在任何已知问题?如果没有,我做错了什么?
【问题讨论】:
【参考方案1】:当用户未登录时,映射驱动器的问题在于它们不存在。驱动器仅映射并可供当前登录的用户使用。如果没有人登录,则不会映射任何驱动器。
作为一种解决方法,您可以通过 CMD 运行,调用 PUSHD,它将您的 UNC 映射到幕后的驱动器,然后执行您的代码。我已经从我的 system32 复制了 tree.com 文件并将其作为“tree4.com”放在我的文件服务器上,并且此代码按预期工作(我还重定向标准输出,因此我可以看到调用的结果,但那是没必要)
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Using P As New Process()
'Launch a standard hidden command window
P.StartInfo.FileName = "cmd.exe"
P.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
P.StartInfo.CreateNoWindow = True
'Needed to redirect standard error/output/input
P.StartInfo.UseShellExecute = False
P.StartInfo.RedirectStandardInput = True
P.StartInfo.RedirectStandardOutput = True
'Add handler for when data is received
AddHandler P.OutputDataReceived, AddressOf SDR
'Start the process
P.Start()
'Begin async data reading
P.BeginOutputReadLine()
'"Map" our drive
P.StandardInput.WriteLine("pushd \\file-server\File-Server")
'Call our command, you could pass args here if you wanted
P.StandardInput.WriteLine("tree2.com c:\3ea7025b247d0dfb7731a50bf2632f")
'Once our command is done CMD.EXE will still be sitting around so manually exit
P.StandardInput.WriteLine("exit")
P.WaitForExit()
End Using
Me.Close()
End Sub
Private Sub SDR(ByVal sender As Object, ByVal e As DataReceivedEventArgs)
Trace.WriteLine(e.Data)
End Sub
【讨论】:
【参考方案2】:我遇到了这个问题,接受的解决方案对我来说有点复杂。我所做的是采用 UNC 路径并将其内容复制到 [Path.GetTempDir()]\[Guid.NewGuid().ToString()]
,然后将其用作 process.StartInfo.WorkingDirectory
的工作目录。将此功能包装在一个名为“Environment”的类中,该类将实现 IDisposable 并在 dispose 中清理您创建的临时目录。像这样(忽略设置参考):
using (var env = new ProcessEnvironment(settings))
filePath = Path.Combine(env.WorkingDirectory, settings.ApplicationEXE);
var psi = new ProcessStartInfo
UseShellExecute = false,
FileName = filePath,
WorkingDirectory = env.WorkingDirectory,
Arguments = (args != null && args.Length > 0 ? String.Join(" ", args) : null)
;
var proc = Process.Start(psi);
if (env.ExecutingFromTempDir || settings.WaitForExit)
proc.WaitForExit();
ProcessEnvironment 看起来像:
class ProcessEnvironment : IDisposable
private Settings itsSettings;
private string itsTempDestDirectory;
public string WorkingDirectory get; set;
public bool ExecutingFromTempDir get return !String.IsNullOrEmpty(itsTempDestDirectory);
public ProcessEnvironment(Settings settings)
this.itsSettings = settings;
WorkingDirectory = GetWorkingDirectory();
private string GetWorkingDirectory()
var dirInfo = new DirectoryInfo(itsSettings.StartupFolder);
if (!IsUncDrive(dirInfo))
return itsSettings.StartupFolder;
return CreateWorkingDirectory(dirInfo);
private string CreateWorkingDirectory(DirectoryInfo dirInfo)
var srcPath = dirInfo.FullName;
itsTempDestDirectory = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
Directory.CreateDirectory(itsTempDestDirectory);
//Now Create all of the directories
foreach (string dirPath in Directory.GetDirectories(srcPath, "*", SearchOption.AllDirectories))
Directory.CreateDirectory(dirPath.Replace(srcPath, itsTempDestDirectory));
//Copy all the files & Replaces any files with the same name
foreach (string newPath in Directory.GetFiles(srcPath, "*.*", SearchOption.AllDirectories))
File.Copy(newPath, newPath.Replace(srcPath, itsTempDestDirectory), true);
return itsTempDestDirectory;
private bool IsUncDrive(DirectoryInfo dirInfo)
Uri uri = null;
if (!Uri.TryCreate(dirInfo.FullName, UriKind.Absolute, out uri))
return false;
return uri.IsUnc;
public void Dispose()
try
if (ExecutingFromTempDir)
Directory.Delete(itsTempDestDirectory, true);
catch (Exception ex)
//do nothing - if we can't delete then we can't do it
Console.WriteLine("Failed in Dispose: " + ex);
【讨论】:
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