我对PowerShell中回声和写入主机之间的区别感到困惑。我有两个文件，POC.ps1& validatePath.ps1。这些文件在我的本地机器上，我使用Invoke-Command在远程机器上运行它们。我正在使用PowerShell v3.0。
要执行这两个脚本，我使用命令：
.\POC.ps1 -filename C:\Users -user Blaine
以下是两个文件：
POC.ps1：
param($filename,$user) echo $filename echo "This" echo $user $responSEObject = Invoke-Command testcomputer -FilePath .\validatePath.ps1 -ArgumentList($filename,$user) -AsJob while($responSEObject.State -ne "Completed") { } $result = Receive-Job -Id $responSEObject.Id -Keep echo $result
这里是什么东西变得奇怪？
validatePath.ps1：
Param([string] $filename,[string] $user)
function ValidatePath( $filename,$user,$fileType = "container" )
{
Write-Host "This is the file name: $filename"
Write-Host "This is user: $user" <--- Notice I'm using Write-Host here
$fileExist = $null
if( -not (test-path $filename -PathType $fileType) )
{
throw "$user,the path $filename does not exist!"
}
else
{
Write-Host "This is the second part"
echo $filename found!
}
Write-Host "This is the third part"
return $fileExist
}
try
{
ValidatePath($filename,$user)
}
catch
{
$e = $_.Exception
echo $e
}
当我运行上面的脚本，这是输出：
C:\Users This Blaine This is the file name: C:\Users Blaine This is user: <--- Notice where this line is? This is the second part This is the third part C:\Users Blaine found!
但是如果我将validatePath.ps1更改为：
Param([string] $filename,$fileType = "container" )
{
Write-Host "This is the file name: $filename"
echo "This is user: $user" <---notice I'm using Echo here
$fileExist = $null
if( -not (test-path $filename -PathType $fileType) )
{
throw "$user,the path $filename does not exist!"
}
else
{
Write-Host "This is the second part"
echo $filename found!
}
Write-Host "This is the third part"
return $fileExist
}
try
{
ValidatePath($filename,$user)
}
catch
{
$e = $_.Exception
echo $e
}
这是输出：
C:\Users This Blaine This is the file name: C:\Users Blaine This is the second part This is the third part This is user: <---- Notice where this line is now? C:\Users Blaine found!
你会注意到，这行“这是用户：”在不同的地方。为什么是这样？为什么回声工作与写入主机不同？
更新：
更奇怪的是，如果我像这样重新运行脚本：
POC.ps1：
param($filename,$user) echo $filename echo "This" echo $user $responSEObject = Invoke-Command CAPTESTPK01 -FilePath .\validatePath.ps1 -ArgumentList $filename,$user -AsJob while($responSEObject.State -ne "Completed") { } $result = Receive-Job -Id $responSEObject.Id -Keep echo $result $filename = "C:\saddfasdfj" #Here I run the command again,using a different file name $responSEObject = Invoke-Command CAPTESTPK01 -FilePath .\validatePath.ps1 -ArgumentList $filename,$user -AsJob while($responSEObject.State -ne "Completed") { if($responSEObject.State -eq "Failed") { echo "Failed" $result = Receive-Job -Id $responSEObject.Id -Keep echo $result break } } $result = Receive-Job -Id $responSEObject.Id -Keep echo $resul
当在validatePath.ps1中使用echo时，它给我这个输出：
C:\Users This Blaine This is the file name: C:\Users This is the second part This is the third part This is user: Blaine <---- This line is here C:\Users found! This is the file name: C:\saddfasdfj This is user: Blaine <---- But now it's here,where it should be? Wth? Blaine,the path C:\saddfasdfj does not exist!
