I come across a sample vbscript program from Microsoft site regarding Windows Update(named WUA_SearchDownloadInstall.vbs).
http://msdn.microsoft.com/en-us/library/aa387102%28VS.85%29.aspx
Set updateSession = CreateObject("Microsoft.Update.Session")
Set updateSearcher = updateSession.CreateupdateSearcher()
WScript.Echo "Searching for updates..." & vbCRLF
Set searchResult = _
updateSearcher.Search("IsInstalled=0 and Type='Software'")
WScript.Echo "List of applicable items on the machine:"
For I = 0 To searchResult.Updates.Count-1
Set update = searchResult.Updates.Item(I)
WScript.Echo I + 1 & "> " & update.Title
Next
If searchResult.Updates.Count = 0 Then
WScript.Echo "There are no applicable updates."
WScript.Quit
End If
WScript.Echo vbCRLF & "Creating collection of updates to download:"
Set updatesToDownload = CreateObject("Microsoft.Update.UpdateColl")
For I = 0 to searchResult.Updates.Count-1
Set update = searchResult.Updates.Item(I)
WScript.Echo I + 1 & "> adding: " & update.Title
updatesToDownload.Add(update)
Next
WScript.Echo vbCRLF & "Downloading updates..."
Set downloader = updateSession.CreateUpdateDownloader()
downloader.Updates = updatesToDownload
downloader.Download()
WScript.Echo vbCRLF & "List of downloaded updates:"
For I = 0 To searchResult.Updates.Count-1
Set update = searchResult.Updates.Item(I)
If update.IsDownloaded Then
WScript.Echo I + 1 & "> " & update.Title
End If
Next
Set updatesToInstall = CreateObject("Microsoft.Update.UpdateColl")
WScript.Echo vbCRLF & _
"Creating collection of downloaded updates to install:"
For I = 0 To searchResult.Updates.Count-1
set update = searchResult.Updates.Item(I)
If update.IsDownloaded = true Then
WScript.Echo I + 1 & "> adding: " & update.Title
updatesToInstall.Add(update)
End If
Next
WScript.Echo vbCRLF & "Would you like to install updates now? (Y/N)"
strInput = WScript.StdIn.Readline
WScript.Echo
If (strInput = "N" or strInput = "n") Then
WScript.Quit
ElseIf (strInput = "Y" or strInput = "y") Then
WScript.Echo "Installing updates..."
Set installer = updateSession.CreateUpdateInstaller()
installer.Updates = updatesToInstall
Set installationResult = installer.Install()
'Output results of install
WScript.Echo "Installation Result: " & _
installationResult.ResultCode
WScript.Echo "Reboot Required: " & _
installationResult.RebootRequired & vbCRLF
WScript.Echo "Listing of updates installed " & _
"and individual installation results:"
For I = 0 to updatesToInstall.Count - 1
WScript.Echo I + 1 & "> " & _
updatesToInstall.Item(i).Title & _
": " & installationResult.GetUpdateResult(i).ResultCode
Next
End If
his script runs well until it reaches
downloader.Download()
On that line, the CMD window outputs
C:\wu-install\WUA_SearchDownloadInstall.vbs(37, 1) (null): 0x80240044
By adding a printf line before downloader.Download()
, I can see that the error is asserted immediately in Download().
My question is: How can I find clue to know the error reason? May be there is way to catch the exception and let output some detailed error message.
I tried with the help of this post( Seem like a VBscript exception, how to cope with? ), and write around the problem line:
On Error Resume Next
downloader.Download()
If Err.Number <> 0 Then
WScript.Echo Err.Description
WScript.Quit 4
End If
On Error Goto 0
But WScript.Echo Err.Description
outputs nothing. How can I do?
My environment: Windows 7 32-bit.
[[[ UPDATE ]]]
I'm back on this question. I've updated my script to use JScript. Yes, it is convenient than VBScript.
Now I have such code snippet:
var downloader = updsession.CreateUpdateDownloader()
downloader.Updates = updatesToDownload
try {
downloader.Download()
}
catch(err) {
WScript.Echo("Oops, Download error.")
WScript.Echo("Possible reason:")
WScript.Echo("* On Windows Vista/7, This requires you Run as Administrator.")
WScript.Quit(3)
}
Remaining question is: How do I get error code from Download() so that I can check error reason. The page at http://msdn.microsoft.com/en-us/library/windows/desktop/aa386134%28v=vs.85%29.aspx seems too coarse for me to find the answer.
Waiting for your help again. Thank you.