string - 用于存储字符串的 PowerShell 数组

Question

我有一个文件列表，我将这些文件分成几部分。这有效，但我希望能够单独引用每个部分。问题在于我的阵列不想/无法接收字符串。文件命名格式为 custID_invID_prodID 或 custID_invID_prodID_Boolvalue。

$files = Get-ChildItem test *.txt
[string]$custId = $files.Count
[string]$invID = $files.Count
[string]$prodID = $files.Count
[int]$Boolvalue = $files.Count
foreach($file in (Get-ChildItem test *.txt)) {
    for($i = 0; $i -le $files.Count; $i++){
        $custId[$i], $invID[$i], $prodID[$i], $Boolvalue[$i] = $file.BaseName -split "_"
        Write-Host $custId, $invID, $prodID, $Boolvalue
    }
}

我看到的错误消息是:

Unable to index into an object of type System.String.

我怎样才能做到这一点？

Answer 1

我建议使用对象而不是大量的字符串数组。我在下面有一个示例，其中我替换了文件列表，因为我没有使用普通数组的文件结构。只需删除该数组声明并放入您的 Get-ChildItem打电话，它应该可以正常工作。

function ConvertTo-MyTypeOfItem
{
    PARAM (
        [ValidatePattern("([^_]+_){3}[^_]+")]
        [Parameter(Mandatory = $true, ValueFromPipeline = $true)]
        [string]$StringToParse
    )

    PROCESS {
        $custId, $invId, $prodId, [int]$value = $StringToParse -split "_"
        $myObject = New-Object PSObject -Property @{
            CustomerID = $custId;
            InvoiceID = $invId;
            ProductID = $prodId;
            Value = $value
        }
        Write-Output $myObject
    }
}

# In the test scenario I have replaced getting the list of files
# with an array of names. Just uncomment the first and second lines 
# following this comment and remove the other $baseNames setter, to
# get the $baseNames from the file listing

#$files = Get-ChildItem test *.txt
#$baseNames = $files.BaseName
$baseNames = @(
    "cust1_inv1_prod1_1";
    "cust2_inv2_prod2_2";
    "cust3_inv3_prod3_3";
    "cust4_inv4_prod4_4";
)

$myObjectArray = $baseNames | ConvertTo-MyTypeOfItem 

$myObjectArray

上面的函数将返回带有 CustomerID 的对象, InvoiceID , ProductID和 Value特性。在上面的示例中，调用了该函数并将返回的数组值设置为 $myObjectArray/code> variable. When output in the console it will give the following output:



InvoiceID                CustomerID               ProductID                                  Value
---------                ----------               ---------                                  -----
inv1                     cust1                    prod1                                          1
inv2                     cust2                    prod2                                          2
inv3                     cust3                    prod3                                          3
inv4                     cust4                    prod4                                          4