问题描述
我需要一个PowerShell脚本，该脚本可以访问文件的属性并发现 LastWriteTime 属性，并将其与当前日期进行比较并返回日期差.
I need a PowerShell script that can access a file's properties and discover the LastWriteTime property and compare it with the current date and return the date difference.
我有这样的东西...
I have something like this...
$writedate = Get-ItemProperty -Path $source -Name LastWriteTime
...但是我不能将 LastWriteTime 转换为"DateTime"数据类型.它说:无法将"@ {LastWriteTime = ... date ...}"转换为"System.DateTime".
...but I can not cast the LastWriteTime to a "DateTime" datatype. It says, "Cannot convert "@{LastWriteTime=...date...}" to "System.DateTime".
推荐答案
尝试以下方法.
$d = [datetime](Get-ItemProperty -Path $source -Name LastWriteTime).lastwritetime
这是item属性怪异的一部分.当您运行Get-ItemProperty时，它不会返回值，而是返回属性.您必须再使用一个间接级别来获得该值.
This is part of the item property weirdness. When you run Get-ItemProperty it does not return the value but instead the property. You have to use one more level of indirection to get to the value.
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