目录大小错误

Question

我有一个脚本来检查文件夹及其所有子文件夹的大小，它可以满足我的需要，但如果文件夹大小为 0，它会抛出错误。我想添加一些逻辑，但我似乎找不到好方法，提前感谢您的帮助。

脚本是：

$startFolder = "C:\"

$colItems = (Get-ChildItem $startFolder | Measure-Object -property length -sum)
"$startFolder -- " + "{0:N2}" -f ($colItems.sum / 1MB) + " MB"

$colItems = (Get-ChildItem $startFolder -recurse | Where-Object $_.PSIsContainer -eq $True} | Sort-Object)
foreach ($i in $colItems)
{
    $subFolderItems = (Get-ChildItem $i.FullName | Measure-Object -property length -sum)
    $i.FullName + " -- " + "{0:N2}" -f ($subFolderItems.sum / 1MB) + " MB"
}

Answer 1

最后我得到了这个。当一个文件夹没有文件时，即使它有非空文件夹，也会发生此错误。 EBGreen 发布的解决方案并不完整，因为它只考虑了子文件。

正确的脚本是：

$folder = $args[0]
[console]::WriteLine($folder)
$startFolder = $folder

#here we need the size of all subfiles and subfolders. Notice the -Recurse
$colItems = (Get-ChildItem $startFolder -Recurse | Measure-Object -property length -sum)
"$startFolder -- " + "{0:N2}" -f ($colItems.sum / 1MB) + " MB"
"------"

#here we take only the first level subfolders. Notice the Where-Object clause and NO -Recurse
$colItems = (Get-ChildItem $startFolder | Where-Object {$_.PSIsContainer -eq $True} | Sort-Object)
foreach ($i in $colItems)
    {
        $i.FullName
        #here we need again the size of all subfiles and subfolders, notice the -Recurse
        $subFolderItems = (Get-ChildItem $i.FullName -Recurse | Measure-Object -property length -sum)
        "                                   -- " + "{0:N2}" -f ($subFolderItems.sum / 1MB) + " MB"
    }

现在没有错误并且值是准确的。

Answer 2

这对我有用，没有错误：

$startFolder = "C:\"

$colItems = (Get-ChildItem $startFolder | Measure-Object -property length -sum)
"$startFolder -- " + "{0:N2}" -f ($colItems.sum / 1MB) + " MB"

$colItems = (Get-ChildItem $startFolder -recurse | Where-Object {$_.PSIsContainer -eq $True} | Sort-Object)
foreach ($i in $colItems)
{
    $subFolderItems = (Get-ChildItem $i.FullName | Measure-Object -property length -sum -ErrorAction SilentlyContinue)
    $i.FullName + " -- " + "{0:N2}" -f ($subFolderItems.sum / 1MB) + " MB"
}

Answer 3

问题在于，对于空文件夹，Get-ChildItem 的输出为 $null。 Measure-Object 需要一个具有长度属性的输入对象。因此，您可以省略对空文件夹的处理，如下所示：

foreach ($i in $colItems)
{
    if ($i.GetFileSystemInfos().Count) {
        $subFolderItems = (Get-ChildItem $i.FullName | Measure-Object -property length -sum)
        $i.FullName + " -- " + "{0:N2}" -f ($subFolderItems.sum / 1MB) + " MB"
    }
}