在 VBS 中使用环境变量的值时出现问题

我是 VBScript 新手，编写了一个可以修改 XML 文件的小脚本；但我在将计算机名称放入 XML 时遇到问题。

我从以下位置获取了计算机名称HOST使用这些行的环境变量：

 Set wshShell = CreateObject( "WScript.Shell" )
 WScript.Echo wshShell.ExpandEnvironmentStrings( "HOST=%HOST%" )

但是，现在我不清楚如何将其放入 XML 内的几个路径中 - 这意味着我希望计算机名称出现在您看到的任何地方%HOST% below:

sWebcastFlash = "%HOST%:port/webcast/"
sWebcastInfra = "%HOST%/webcast/"
sWebcastTelephone = "%HOST%:port/telephone/"

%HOST%上面的字符串没有扩展成HOST环境变量的值如我所愿。我缺少什么？

这是我的完整脚本：

Set wshShell = CreateObject( "WScript.Shell" )
WScript.Echo wshShell.ExpandEnvironmentStrings( "HOST=%HOST%" )
'wshShell = Nothing


sWebcastFlash = "%HOST%:port/webcast/"
sWebcastInfra = "%HOST%/webcast/"
sWebcastTelephone = "%HOST%:port/telephone/"

'Create XMLDoc object
Set xmlDoc = CreateObject("Microsoft.XMLDOM")
xmlDoc.load "D:\Configuration\developer\developer-definitions.xml"

Set nWebcastFlash = xmlDoc.selectSingleNode("//clusters/cluster/servers/server/webcast-fms-url-for-flash")
Set nWebcastInfra = xmlDoc.selectSingleNode("//clusters/cluster/servers/server/webcast-fms-url-for-infra")
Set nWebcastTelephone = xmlDoc.selectSingleNode("//clusters/cluster/servers/server/webcast-fms-telephone-preview-url")
Set nWebcamUrl = xmlDoc.selectsinglenode ("//clusters/cluster/servers/server/webcam-self-test-url")
Set nHostName = xmlDoc.selectsinglenode ("//clusters/cluster/servers/server/host-name")
Set nHostAddress = xmlDoc.selectsinglenode ("//clusters/cluster/servers/server/host-address")
Set nAudUrl = xmlDoc.selectsinglenode ("//media-definitions/media-servers/on-demand-media-url/url-list/url/aud-url")
Set nFlashUrl = xmlDoc.selectsinglenode ("//flash-server-chat-list-url/flash-server-url")
Set nWebcamTest = xmlDoc.selectsinglenode ("//flash-server-webcam-self-url/webcam-self-test")

'Set the text node with the new value
nWebcastFlash.text = sWebcastFlash
nWebcastInfra.text = sWebcastInfra
nWebcastTelephone.text = sWebcastTelephone
'Save the xml document with the new settings.
strResult = xmldoc.save("D:\out.xml")

您只需分配扩展的HOST环境变量到局部变量并将其添加到要在其中使用它的字符串之前：

Set wshShell = CreateObject( "WScript.Shell" )
host = wshShell.ExpandEnvironmentStrings( "%HOST%" )
wshShell = Nothing


sWebcastFlash = host & ":port/webcast/"
sWebcastInfra = host & "/webcast/"
sWebcastTelephone = host & ":port/telephone/"

Edit:

@Tomalak 在他的评论中提出了一个很好的观点。为了完整起见，您还可以通过调用来完成此操作ExpandEnvironmentStrings对于要在其中使用的每个字符串HOST环境变量的值：

Set wshShell = CreateObject( "WScript.Shell" )

sWebcastFlash = wshShell.ExpandEnvironmentStrings( "%HOST%:port/webcast/" )
sWebcastInfra = wshShell.ExpandEnvironmentStrings( "%HOST%/webcast/" )
sWebcastTelephone = wshShell.ExpandEnvironmentStrings( "%HOST%:port/telephone/" )

wshShell = Nothing

正如 @Tomalak 进一步指出的那样，这涉及更多的代码：在我看来，这是不必要的重复，但是 TMTOWTDI。