通过测试连接进行Powershell尝试/捕获

Question

我正在尝试将脱机计算机记录在文本文件中，以便以后可以再次运行它们。似乎没有被记录或捕获。

function Get-ComputerNameChange {

    [CmdletBinding()]
    Param(
    [Parameter(Mandatory=$True,ValueFromPipeline=$True,ValueFromPipelinebyPropertyName=$True)]
    [string[]]$computername,
    [string]$logfile = 'C:\PowerShell\offline.txt'
    )




    PROCESS {

        Foreach($computer in $computername) {
        $continue = $true
        try { Test-Connection -computername $computer -Quiet -Count 1 -ErrorAction stop
        } catch [System.Net.NetworkInformation.PingException]
        {
            $continue = $false

            $computer | Out-File $logfile
        }
        }

        if($continue){
        Get-EventLog -LogName System -ComputerName $computer | Where-Object {$_.EventID -eq 6011} | 
        select machinename, Time, EventID, Message }}}

Answer 1

try用于catch异常(exception)。您正在使用-Quiet开关，因此Test-Connection返回$true或$false，并且在连接失败时不会throw异常。

做就是了:

if (Test-Connection -computername $computer -Quiet -Count 1) {
    # succeeded do stuff
} else {
    # failed, log or whatever
}