RoboCopy目錄使用PowerShell調整大小

Question

我正試圖獲取僅在我的根文件夾中的子目錄的報告。嘗試這樣做時，我收到兩個錯誤。

You cannot call a method on a null-valued expression. 
At line:5 char:1 
+ $fldSize = (robocopy $DIR "NO" /e /l /r:0 /w:0 /nfl /ndl /nc /fp /np ... 
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : InvalidOperation: (:) [], RuntimeException 
    + FullyQualifiedErrorId : InvokeMethodOnNull 

Method invocation failed because [System.IO.DirectoryInfo] does not contain a method named 'op_Addition'. 
At line:6 char:1 
+ $DIR + " = " + "{0:N2}" -f ($fldSize/1MB) + " MB" 
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : InvalidOperation: (op_Addition:String) [], RuntimeException 
    + FullyQualifiedErrorId : MethodNotFound 

我已經做了一點看，什麼我發現似乎表明一個數組的問題，但是沒有什麼迄今爲止我曾嘗試已取得任何不同的結果。腳本在下面。

function get_dir ($SDIR){ 
$colItems = Get-ChildItem $SDIR -Directory 
foreach ($DIR in $colItems) 
{ 
$fldSize = (robocopy $DIR "NO" /e /l /r:0 /w:0 /nfl /ndl /nc /fp /np /njh /xj /bytes| ? {$_ -match "Bytes :"}).trim().split(" ")[2] 
$DIR + " = " + "{0:N2}" -f ($fldSize/1MB) + " MB" 
} 
} 


get_dir C:\TEST\ 

Answer 1

的問題是，你需要在$colitems使用$DIR.fullname爲每一個元素都是DirectoryInfo類型的，你不能把它作爲一個字符串作爲你的代碼ROBOCOPY後再行做創建你的結果。

這是一個固定的版本

function get_dir ($SDIR) 
{ 
    $colItems = Get-ChildItem $SDIR -Directory 
    foreach ($DIR in $colItems) 
    { 
     $fldSize = (robocopy $DIR.fullname "NO" /e /l /r:0 /w:0 /nfl /ndl /nc /fp /np /njh /xj /bytes| ? {$_ -match "Bytes :"}).trim().split(" ")[2] 
     $DIR.fullname + " = " + ("{0:N2}" -f ($fldSize/1MB) + " MB") 
    } 
}