Powershell：如何从 output 中获取 select 的特定值？

Question

有没有办法只从下面命令的 output 中提取特定值？

applicationName applicationId attributes
--------------- ------------- ----------
Keno_Test_App          115345 {@{name=Regions; id=2722; value=(Not Set)}, @{name=Project type; id=5162; value=(Not Set)}, @{name=Interface type; id=5163; value=(Not Set)}, @{name=Data classification; id=5164; value=(Not Set)}...}
Keno_Test_App2         118991 {@{name=Regions; id=2722; value=(Not Set)}, @{name=Project type; id=5162; value=(Not Set)}, @{name=Interface type; id=5163; value=(Not Set)}, @{name=Data classification; id=5164; value=(Not Set)}...}

我尝试做这样的事情，但它仍然捕获 output：

PS C:\WINDOWS\system32> $getapp.applicationName
Keno_Test_App
Keno_Test_App2

有没有像这样的 output ：

PS C:\WINDOWS\system32> $getapp.applicationName
Keno_Test_App

或者：

applicationName applicationId attributes
--------------- ------------- ----------
Keno_Test_App          115345 {@{name=Regions; id=2722; value=(Not Set)}, @{name=Project type; id=5162; value=(Not Set)}, @{name=Interface type; id=5163; value=(Not Set)}, @{name=Data classification; id=5164; value=(Not Set)}...}

Answer 1

如果$getapp.applicationName输出这个：

Keno_Test_App
Keno_Test_App2

然后($getapp.applicationName)[0]将 output:

Keno_Test_App

如果$getapp输出这个：

applicationName applicationId attributes
--------------- ------------- ----------
Keno_Test_App          115345 {@{name=Regions; id=2722; value=(Not Set)}, @{name=Project type; id=5162; value=(Not Set)}, @{name=Interface type; id=5163; value=(Not Set)}, @{name=Data classification; id=5164; value=(Not Set)}...}
Keno_Test_App2         118991 {@{name=Regions; id=2722; value=(Not Set)}, @{name=Project type; id=5162; value=(Not Set)}, @{name=Interface type; id=5163; value=(Not Set)}, @{name=Data classification; id=5164; value=(Not Set)}...}

然后$getapp[0]将 output：

applicationName applicationId attributes
--------------- ------------- ----------
Keno_Test_App          115345 {@{name=Regions; id=2722; value=(Not Set)}, @{name=Project type; id=5162; value=(Not Set)}, @{name=Interface type; id=5163; value=(Not Set)}, @{name=Data classification; id=5164; value=(Not Set)}...}