在交互PowerShell中捕获错误

Question

如果尝试在ineracvie powershell中做些事情，是否有可能捕获一个错误？ 我的意思是：

powershell.exe 
PS C:>_ 
PS C:>fuu 
fuu: this is not a cmdlet .... BLA BLA BLA 
+ ~~~ 
    + CategoryInfo   : ObjectNotFound: (fuu:String) [], CommandNotFoundException 
    + FullyQualifiedErrorId : CommandNotFoundException 

这是ineractive PowerShell中的正常行为。 我可以把我的Profile.ps1中的东西或所以一切都保持这样，但对于一个特定的错误，例如这些CommandNotFoundException，只有在这些错误我改变PowerShell的行为？也许是一个新的主持人或其他东西。

powershell.exe 
PS C:>_ 
PS C:>fuu 
fuu: this is not a cmdlet so CommandNotFoundException and now i behave diffrent my lord 
PS C:>_ 

所以是的，我知道尝试捕捉等 - >在脚本中，但我的意思是interactivly作为默认的行为！

感谢

[更新]

要明确的事情了。真正的案例是编码。 ExecutionPolicy是AllSignt，如果我忘了签testcode ofcourse你得到了错误：

+ ~~~~~~~~~~~~~~ 
    + CategoryInfo   : Sicherheitsfehler: (:) [], PSSecurityException 
    + FullyQualifiedErrorId : UnauthorizedAccess 

但确切的这种情况下，我不想这个错误，我想这个问题，你要签名吗？ Y/N

....比做那个。

Answer 1

使用此结构：

$Error.Clear() 

fooo 

$Errormessage = $Error | Out-String 
$Errormessage 

您将获得：

fooo : The term 'fooo' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the 
path is correct and try again. 
At line:5 char:1 
+ fooo 
+ ~~~~ 
    + CategoryInfo   : ObjectNotFound: (fooo:String) [], CommandNotFoundException 
    + FullyQualifiedErrorId : CommandNotFoundException 

，当你有字符串就可以使解析器，让您的自定义错误处理程序一样

$customerror = $Errormessage.reaplace("fooo : The term 'fooo' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the 
path is correct and try again.","Foo is not functin") 

write-output $customerror