vbscript调用svnadmin转储

Question

运行以下vbscript调用svnadmin转储失败（即未创建任何转储）

Set objShell = CreateObject("WScript.Shell")
Set objShellExec = objShell.Exec("svnadmin dump  C:\svn_repos > C:\fullbackup")

我从另一篇文章中发现， svn dump无法使用WScript.Shell ，我必须使用cmd创建一个新的命令解释器，如下所示：

Set objShellExec = objShell.Exec("%comspec% /c" & "svnadmin dump  C:\svn_repos > C:\fullbackup")

这样成功创建了转储，但是我从不读取输出信息（即*转储修订版100。*转储修订版101。等等）。 我试过了

Do While objWshScriptExec.Status = 0
    Wscript.Echo objShellExec.StdOut.Readline
    Wscript.Echo objShellExec.StdErr.Readline
    WScript.Sleep 100
Loop

但什么也没显示。

我可以知道如何读取输出信息，为什么还要在svnadmin dump命令正确执行之前需要使用“％comspec％/ c”创建一个新的命令解释器？ 谢谢。

问候，德克斯顿

编辑代码：

Set objShell = CreateObject("WScript.Shell")

Set objFS = CreateObject("Scripting.FileSystemObject") 

strOutput = "c:\svn_backup\fullbackupa" 

Set objOutFile = objFS.CreateTextFile(strOutput,True) 

Set objShellExec = objShell.Exec("%comspec% /c " & "svnadmin dump C:\svn_repos")

Do While objShellExec.Status = 0 
  stdoutline=objShellExec.StdOut.Readline 
  'Wscript.Echo stdoutline 'echo to standard output 
  Wscript.Echo objShellExec.StdErr.Readline 
  objOutFile.WriteLine(stdoutline & vbCrLf) 'write to file at the same time 
  WScript.Sleep 100 
Loop 


objOutFile.Close

解：

Set objShell = CreateObject("WScript.Shell")

Set objFS = CreateObject("Scripting.FileSystemObject") 

strOutput = "c:\svn_backup\fullbackupa" 

Set objOutFile = objFS.CreateTextFile(strOutput,True) 


Set objShellExec = objShell.Exec("%comspec% /c " & "svnadmin dump C:\svn_repos > c:\svn_backup\fullbackupb")

Do While objShellExec.Status = 0 
  stdoutline=objShellExec.StdErr.Readline 
  Wscript.Echo stdoutline 'echo to standard output 
  'Wscript.Echo objShellExec.StdErr.Readline 
  objOutFile.WriteLine(stdoutline & vbCrLf) 'write to file at the same time 
  WScript.Sleep 100 
Loop 


objOutFile.Close

Answer 1

您无法读取状态，因为您将所有标准输出重定向到c:\\fullbackup 。 您应该打开文件c:\\fullbackup并阅读其中的内容。

更新：您可以将状态写入输出文件，类似这样

Set objFS = CreateObject("Scripting.FileSystemObject")
strOutput = "c:\fullbackup"
Set objOutFile = objFS.CreateTextFile(strOutput,True)
...
Do While objWshScriptExec.Status = 0
    stdoutline=objShellExec.StdOut.Readline
    Wscript.Echo stdoutline 'echo to standard output
    'Wscript.Echo objShellExec.StdErr.Readline
    objOutFile.WriteLine(stdoutline & vbCrLf) 'write to file at the same time
    WScript.Sleep 100
Loop
....
objOutFile.Close