Question

我喜欢搜索带有预定义扩展名的旧文件。（例如.doc，.xls，.txt等）在特定文件夹中。我将扩展名放在变量中：

$wildcards = @(".txt",".doc",".xls")

当我在此变量中添加新值时，它必须更改另一个变量。（$ collection）

这是我的代码：

$folder = Get-ChildItem C:\test\test1\
$date = (Get-Date).Add(-1)
$wildcards = @(".txt",".doc",".xls")


function Get-WildCards { 

$counter = 0;
$counterEnd = $wildcards.Count
$collection = New-Object System.Collections.ArrayList 
$filter = "$" + "_.Extension" + " -like $" + "wildcards[" + $counter + "]}"
$or = " -or "

    for ($counter = 0; $counter -lt $counterEnd; $counter++) {

        $filter = "$" + "_.Extension" + " -like $" + "wildcards[" + $counter + "]}"
        $collection += $filter + $or
    }

$collection = [String]::Join('', $collection)
$collection = $collection.ToString()
$collection = $collection.TrimEnd($or)
} 

Get-WildCards

$folderPath = $folder.FullName

$files = Get-ChildItem -Path $folderPath -File:$true |
 Where-Object {$collection} 

$files

如果我运行这段代码，Where-Object条件将无法以这种方式工作。它不会过滤扩展。我如何实现它的工作原理？任何帮助表示赞赏。

Answer 1

您似乎正在使事情复杂化。试试这个-

$folder = Get-ChildItem C:\test\test1\
$wildcards = @(".txt",".doc",".xls")
$files = Get-ChildItem -Path $folderPath | where {$_.extension -in $wildcards}
$files

使用Powershell过滤文件扩展名

1 个答案: