[新手上路]批处理新手入门导读[视频教程]批处理基础视频教程[视频教程]VBS基础视频教程[批处理精品]批处理版照片整理器
[批处理精品]纯批处理备份&还原驱动[批处理精品]CMD命令50条不能说的秘密[在线下载]第三方命令行工具[在线帮助]VBScript / JScript 在线参考
返回列表 发帖

[转载代码] [PowerShell每日技巧]去除结果中的空属性(20140121)

To exclude results that have empty properties, you can easily use Where-Object. For example, when you run Get-Hotfix, and you only want to see hotfixes that have a date for InstalledOn, here is the solution:
  1. Get-HotFix | Where-Object InstalledOn
复制代码
Likewise, to get only network adapters from WMI that actually have an IP address, try this:
  1. Get-WmiObject -Class Win32_NetworkAdapterConfiguration | Where-Object IPAddress
复制代码
Note that in PowerShell 2.0 and below, you need to use the full syntax like this:
  1. Get-WmiObject -Class Win32_NetworkAdapterConfiguration | Where-Object {$_.IPAddress}
复制代码
Where-Object will exclude any results that have either one of the following in the property you selected: a null value, an empty string, or the number 0. This is because all of these will convert to $false when converted into a Boolean value.

http://powershell.com/cs/blogs/tips/archive/2014/01/21/eliminating-empty-results.aspx

返回列表