如何获得一个foreach循环中的值成一个总和？ [英] How to get a value in a foreach loop into a sum?

问题描述

我在 foreach 循环中有一个变量，如下面的代码片段所示，它计算用户的主文件夹大小（MB）：

  $ TotalColItems = @（）
 foreach（$用户在$ ListofUsers）
 {
 $ colItems =（Get-ChildItem $ user .HomeDirectory -Recurse | 
 Measure-Object -Property Length -Sum）
 Write-Host`r`n大小：$ user.HomeDirectory 
{0：N2} - f（$ colItems.Sum / 1MB）+MB
 $ Calculation ={0：N2}-f（$ colItems.Sum / 1MB）+MB
 $ TotalColItems + = $ colItems.Sum 
 $ user.HomeDirectory +=+ $ Calculation | Out-File $ LogFileName -Append 
 Remove-Item $ user.HomeDirectory -Force -Recurse -ErrorAction SilentlyContinue 
 Write-Host`r`n Removed HomeDirectory：$ user.HomeDirectory 
 Write -Host`r`n验证你想删除用户：$ user.Name -ForegroundColor Yellow -BackgroundColor Red 
 Write-Host`r`n
 Remove-ADObject $ user.DistinguishedName 
 Write-Host $ TotalColItems 
  

但是我似乎无法弄清楚如何获得所有 $ colItems 的总价值，然后我可以计算MB关闭。

我试着把这个循环：

  $ TotalColItems + = $ colItems 
  

但它会在每个循环中重置，所以它不会保留一个正在运行的追加总数。

如何获取 $ colItems 每个循环的变量将其值附加到一个变量，以便我可以有所有的用户目录大小的总和？

$ TotalColItems 变量初始化为一个数组（ @（）是数组子表达式运算符），所以它就像一个。初始化它作为一个数字，你会发现它按预期工作（重新命名的变量名称为自我解释）：

$ $ p $ $ code $ TotalHomeDirSizeMB = 0
foreach（$用户在$ ListofUsers）
{
＃计算文件大小的总和，直接取Sum属性值
$ HomeDirSize =（Get-ChildItem $ user.HomeDirectory -Recurse | Measure-Object -Property length -sum）.Sum

＃以MB计算并存储大小
$ HomeDirSizeMB = $ HomeDirSize / 1MB
＃添加到累计大小变量
$ TotalHomeDirSizeMB + = $ HomeDirSizeMB

＃将结果写入屏幕+文件
写入主机`r`n大小：$（$ user.HomeDirectory）
Write-Host（{0：N2} MB-f $ HomeDirSizeMB）
$（$ user.HomeDirectory）= $ HomeDirSizeMB MB Out-File $ LogFileName -Append

＃删除主目录
Remove-Item $ user.HomeDirectory -Force -Recurse -ErrorAction SilentlyContinue
Write-Host`r`n已删除HomeDirectory：$ user.HomeDirectory

＃等待用户验证从AD删除，抢先确认，如果验证
写主机`r`n验证你想删除用户： $ user.Name -ForegroundColor Yellow -BackgroundColor Red
if（（Read-Host -Prompty for yes）-eq'y'）{
Remove-ADObject $ user.DistinguishedName -Confirm：$ false


$ b $写入累积大小到屏幕
写主机删除$ TotalHomeDirSizeMB MB

I have a variable in a foreach loop as seen in the following snippet that calculates a user's home folder size in MB:

$TotalColItems = @()
foreach ($user in $ListofUsers)
{
    $colItems = (Get-ChildItem $user.HomeDirectory -Recurse |
                Measure-Object -Property Length -Sum)
    Write-Host "`r`n Size of:" $user.HomeDirectory
    "{0:N2}" -f ($colItems.Sum / 1MB) + " MB"
    $Calculation = "{0:N2}" -f ($colItems.Sum / 1MB) + " MB"
    $TotalColItems += $colItems.Sum
    $user.HomeDirectory + " = " + $Calculation | Out-File $LogFileName -Append
    Remove-Item $user.HomeDirectory -Force -Recurse -ErrorAction SilentlyContinue
    Write-Host "`r`n Removed HomeDirectory: " $user.HomeDirectory
    Write-Host "`r`n Verifying you want to remove the user: " $user.Name -ForegroundColor Yellow -BackgroundColor Red
    Write-Host "`r`n"
    Remove-ADObject $user.DistinguishedName
    Write-Host $TotalColItems

But I can't seem to figure out how to get a total value of all $colItems that I can then calculate MB off of.

I tried putting this in the loop:

$TotalColItems += $colItems

but it resets itself per loop, so it doesn't keep a running appended total.

How can I get the $colItems variable per loop to append their value to a variable so that I can have a sum total of all the user directory sizes?

解决方案

The $TotalColItems variable in your example is initialized as an array (@() is the array subexpression operator), so it acts like one. Initialize it as a number and you'll find it works as expected (renamed variable names for self-explanatoryness):

$TotalHomeDirSizeMB = 0
foreach ($user in $ListofUsers)
{
    # Calculate sum of file sizes, grab Sum property value directly
    $HomeDirSize = (Get-ChildItem $user.HomeDirectory -Recurse | Measure-Object -Property length -sum).Sum

    # Calculate and store size in MB
    $HomeDirSizeMB = $HomeDirSize / 1MB
    # Add to cumulative size variable
    $TotalHomeDirSizeMB += $HomeDirSizeMB

    # Write results to screen + file    
    Write-Host "`r`n Size of: $($user.HomeDirectory)"
    Write-Host ("{0:N2} MB" -f $HomeDirSizeMB)
    "$($user.HomeDirectory) = $HomeDirSizeMB MB" | Out-File $LogFileName -Append

    # Remove home directory
    Remove-Item $user.HomeDirectory -Force -Recurse -ErrorAction SilentlyContinue
    Write-Host "`r`n Removed HomeDirectory: " $user.HomeDirectory

    # Wait for user to verify deletion from AD, preempt Confirmation if verified
    Write-Host "`r`n Verifying you want to remove the user: " $user.Name -ForegroundColor Yellow -BackgroundColor Red
    if((Read-Host -Prompt "y for yes") -eq 'y'){
        Remove-ADObject $user.DistinguishedName -Confirm:$false
    }
}

# Write cumulative size to screen
Write-Host "Removed $TotalHomeDirSizeMB MB"

这篇关于如何获得一个foreach循环中的值成一个总和？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！