我在处理有关调用命令的错误/异常时遇到了一些问题。
当目标计算机不存在时，我试图捕获错误，但是显示的消息以及 catch 块中脚本的行为方式让我认为我错过了一些东西或错过了理解。
这是有问题的脚本部分：
$session = New-Pssession -computername $computerName
Invoke-Command -session $session -ScriptBlock $command -ArgumentList $sqlServerName, $userToGivePermisions
Remove-PSsession -session $session
$computerName基本上，当网络上的计算机不是有效计算机时，我想处理错误。我故意给它一个错误的名字来测试它，我得到以下错误：
[dcd] Connecting to remote server failed with the following error message : WinRM cannot process the request. The following error occured while using Kerberos authentication: The network path was not found.
Possible causes are:
-The user name or password specified are invalid.
-Kerberos is used when no authentication method and no user name are specified.
-Kerberos accepts domain user names, but not local user names.
-The Service Principal Name (SPN) for the remote computer name and port does not exist.
-The client and remote computers are in different domains and there is no trust between the two domains.
After checking for the above issues, try the following:
-Check the Event Viewer for events related to authentication.
-Change the authentication method; add the destination computer to the WinRM TrustedHosts configuration setting or use HTTPS transport.
Note that computers in the TrustedHosts list might not be authenticated.
-For more information about WinRM configuration, run the following command: winrm help config. For more information, see the about_Remote_Troubleshooting Help topic.
+ CategoryInfo : OpenError: (System.Manageme....RemoteRunspace:RemoteRunspace) [], PSRemotingTransportException
+ FullyQualifiedErrorId : PSSessionOpenFailed
[dcd] 是不存在机器的名称。我将代码放入 try catch 并使用-contains. 条件总是错误的，我在上面的错误中几乎尝试了一个单词。
当我在 catch 块中显示错误消息时，$_.exception.message我得到了一个关于 $session 为空的不同错误。
当我-contains在显示的关于 $session 的错误消息中使用单词时，它仍然为我测试的每个单词返回 false。
我不明白其中哪一个是错误，为什么-contains永远不会返回真实。我添加了-ea stop所有 3 行以捕获所有非终止错误，但无济于事。
有人知道发生了什么吗？