仅从 LastLogonDate 中提取日期部分

问题描述

我希望能够从这个 Get-ADUser 命令的输出中分离出日期:

I want to be able to isolate the date from the output of this Get-ADUser command:

Get-ADUser -identity johnd -properties LastLogonDate | Select-Object name, LastLogonDate

结果如下:

name                                                        LastLogonDate
----                                                        -------------
John Doe                                                3/21/2016 10:01:36 AM

我希望能够去除所有文本并只留下日期:

I want to be able to strip all the text and be left with only the date:

3/21/2016

我已经尝试将这个拆分过滤器添加到上述命令的末尾，这类似于 unix 中的 awk.(#2 关闭，只是举例)

I've tried adding this split filter to the end of the above command, which is similar to awk in unix. (#2 is off, just for example)

%{ $_.Split(',')[2]; }

导致此错误的原因:

[Microsoft.ActiveDirectory.Management.ADUser] doesn't contain a method named 'Split'

推荐答案

该 cmdlet 的结果是一个具有一组属性的对象.您以表格格式看到的输出并不是对象中实际包含的内容；这是它的显示表示.

The result of that cmdlet is an object with a set of properties. The output you see in table format is not what is literally contained in the object; it's a display representation of it.

所以要首先只获取日期对象，您可以像这样修改您的 Select-Object 调用(它已经削减了属性):

So to first get the date object only, you can modify your Select-Object call (which is already paring down the properties) like this:

$lastLogon = Get-ADUser -identity johnd -properties LastLogonDate |
    Select-Object -ExpandProperty LastLogonDate

$lastLogon 现在包含一个 [DateTime] 对象.

$lastLogon now contains a [DateTime] object.

有了它，您可以使用 格式字符串对其进行格式化:

With that you can format it using format strings:

$lastLogon.ToString('MM/dd/yyyy')

甚至更好:

$lastLogon.ToShortDateString()

(这些表示略有不同；后者不填充零).

(these are slightly different representations; the latter doesn't zero-pad).

格式字符串让您可以完全控制表示.

The format strings give you complete control over the representation.

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