从 powershell v5 中的替换方法捕获异常

Question

我正在尝试编写脚本来查找和替换文件中的字符串。如果脚本由于某种原因无法替换字符串并将其记录在外部文件中，我该如何捕获异常？这是我目前所拥有的。

Write-Host "Checking Execution Policy"

$currentExecutionPolicy = Get-ExecutionPolicy
    if( $currentExecutionPolicy -eq "RemoteSigned")
        {
            Write-Host "Execution policy check passed"
        } 
    else 
        {
            "Setting Execution policy to RemoteSigned as per https://msdn.microsoft.com/powershell/reference/5.1/Microsoft.PowerShell.Core/about/about_Execution_Policies"
            Set-ExecutionPolicy Remotesigned
        }

Write-Host "Starting Script"

#Recurse through all the file shares and find the file.
$rootPath='\do.main.name\shared\Information Technology\IT\u.name'
    $hotspotFile = Get-ChildItem -Path $rootPath -Recurse -Include "hotspot.mac" 
     Write-Host "Found file" $hotspotFile
     $logstring = "Found file" + $hotspotFile
     WriteLog $logstring

       try
       {
         (Get-Content $hotspotFile).Replace("olddomain.com","do.main.name") | Set-Content $hotspotFile    

       }
       catch
       {

        Write-Host "Failed to replace string -" $file
        $logstring = "Failed to replace string -" + $file
        WriteLog $logstring
       }


#Logging
$Logfile = "F:\u.name\Documents\Logs\SCR_To_Find_And_Replace_Old_Domain_String.log"

Function WriteLog
{
   Param ([string]$logstring)

   Add-content $Logfile -value $logstring
}

Answer 1

根据评论，我认为失败的替换不会生成异常，因此您不能使用 try catch。

您可以使用 if 测试，例如：

If ($hotspotfile -notcontains "do.main.name") { }

或者测试文件中是否存在旧字符串。您最好也放入一个较早的 if 语句，首先测试字符串是否存在于文件中，然后跳过替换并检查它是否存在。

从 powershell v5 中的替换方法捕获异常

Catch Exception from replace method in powershell v5

powershell

powershell-5.0