继续执行异常

Question

以下是我要执行的脚本。这里的问题是，一旦发生异常，它会停止执行，我在catch块中使用了continue，但这不起作用。即使在发生异常之后，如何让它工作，它应该在foreach中循环。

我也使用了一个while($true)循环，但进入了无限循环。如何去做呢？

$ErrorActionPreference = "Stop"; 
try 
{ 
# Loop through each of the users in the site 
foreach($user in $users) 
{ 
    # Create an array that will be used to split the user name from the domain/membership provider 
    $a=@() 


    $displayname = $user.DisplayName 
    $userlogin = $user.UserLogin 


    # Separate the user name from the domain/membership provider 
    if($userlogin.Contains('\')) 
    { 
     $a = $userlogin.split("\") 
     $username = $a[1] 
    } 
    elseif($userlogin.Contains(':')) 
    { 
     $a = $userlogin.split(":") 
     $username = $a[1] 
    } 

    # Create the new username based on the given input 
    $newalias = $newprovider + "\" + $username 

    if (-not $convert) 
    { 
     $answer = Read-Host "Your first user will be changed from $userlogin to $newalias. Would you like to continue processing all users? [Y]es, [N]o" 

     switch ($answer) 
     { 
      "Y" {$convert = $true} 
      "y" {$convert = $true} 
      default {exit} 
     } 
    } 

    if(($userlogin -like "$oldprovider*") -and $convert) 
    { 

     LogWrite ("Migrating User old : " + $user + " New user : " + $newalias + " ") 
     move-spuser -identity $user -newalias $newalias -ignoresid -Confirm:$false 
     LogWrite ("Done") 
    } 
} 
} 
catch { 
    LogWrite ("Caught the exception") 
    LogWrite ($Error[0].Exception) 
} 

请帮忙。

Answer 1

当您要处理错误时，请使用try {...} catch {...}。如果您想忽略它们，您应该将$ErrorActionPreference = "Continue"（或"SilentlyContinue"）设置为@ C.B。建议，或者使用-ErrorAction "SilentlyContinue"来提升错误的特定操作。如果你想从某一指令处理错误，你就会把该指令在try {...} catch {...}块，而不是整个循环，例如：

foreach($user in $users) { 
    ... 
    try { 
    if(($userlogin -like "$oldprovider*") -and $convert) { 
     LogWrite ("Migrating User old : " + $user + " New user : " + $newalias + " ") 
     move-spuser -identity $user -newalias $newalias -ignoresid -Confirm:$false 
     LogWrite ("Done") 
    } 
    } catch { 
    LogWrite ("Caught the exception") 
    LogWrite ($Error[0].Exception) 
    } 
} 

Answer 2

修改为下面的代码。用下面的一段代码后move-spuser -identity $user -newalias $newalias -ignoresid -Confirm:$false

if($?) 
{ 
    LogWrite ("Done!") 
    LogWrite (" ") 
} 
else 
{ 
    LogWrite ($Error[0].ToString()) 
    LogWrite (" ") 
} 

Answer 3

一种适合我的工作就是设置$ErrorActionPreference变量停止，然后重新回来继续在catch块：

$e = $ErrorActionPreference 
$ErrorActionPreference="stop" 

try 
{ 
    #Do Something that throws the exception 
} 
catch 
{ 
    $ErrorActionPreference=$e 

} 

$ErrorActionPreference=$e;