Question

我在Powershell中编写一个脚本来收集有关我的存档文件夹中有多少文件的信息，该脚本是计算文件夹中的文件然后它删除的文件比提供日期更早，然后再次计算文件数报告删除的文件数量。

我可以让它工作但是我遇到了一个语法问题。当我这样的时候它工作正常。

Clear-Host

$ErrorFiles = "c:\data\ErrorFiles"
$Archivefiles = "c:\data\Archivefiles"

$PreCountErrorFiles = ((Get-ChildItem $ErrorFiles | Measure-Object).Count)
$PreCountArchivefiles = ((Get-ChildItem $Archivefiles | Measure-Object ).Count)

Get-ChildItem $ErrorFiles  | Where  {$_.LastWriteTime –lt ((Get-Date).AddDays(-10) )}  | ForEach { Remove-Item $_.FullName }
Get-ChildItem $Archivefiles | Where  {$_.LastWriteTime –lt ((Get-Date).AddDays(-10) )}  | ForEach { Remove-Item $_.FullName }

$PostCountErrorFiles = ((Get-ChildItem $ErrorFiles | Measure-Object).Count)
$PostCountArchivefiles  = ((Get-ChildItem $Archivefiles | Measure-Object ).Count)


$str1 = "Number of files in " + $ErrorFiles.ToString() + " was " + $PreCountErrorFiles.ToString() + " number of files deleted " + ($PreCountErrorFiles - $PostCountErrorFiles).ToString() + " and "  + $PostCountErrorFiles.ToString() + " are left." + "`n"  
$str2 = "Number of files in " + $Archivefiles.ToString() + " was " + $PreCountArchivefiles.ToString() + " number of files deleted " + ($PreCountArchivefiles - $PostCountArchivefiles).ToString() + " and "          + $PostCountArchivefiles.ToString() + " are left." + "`n"

write-host $str1
write-host $str2

但是，如果我尝试更改＃str1赋值以使其在一行中并且同时取两个字符串，则会出现此错误（请参阅下面的代码）

无法将值“文件数”转换为“System.Int32”类型。错误：“输入字符串的格式不正确。” 在行：13 char：1 + $ str1 =“文件数”+ $ ErrorFiles.ToString（）+“是”+ $ PreCountErro ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo：InvalidArgument：（:) []，RuntimeException + FullyQualifiedErrorId：InvalidCastFromStringToInteger

Clear-Host

$ErrorFiles = "c:\data\ErrorFiles"
$Archivefiles = "c:\data\Archivefiles"

$PreCountErrorFiles = ((Get-ChildItem $ErrorFiles | Measure-Object).Count)
$PreCountArchivefiles = ((Get-ChildItem $Archivefiles | Measure-Object ).Count)

Get-ChildItem $ErrorFiles  | Where  {$_.LastWriteTime –lt ((Get-Date).AddDays(-10) )}  | ForEach     { Remove-Item $_.FullName }
Get-ChildItem $Archivefiles | Where  {$_.LastWriteTime –lt ((Get-Date).AddDays(-10) )}  | ForEach     { Remove-Item $_.FullName }

$PostCountErrorFiles = ((Get-ChildItem $ErrorFiles | Measure-Object).Count)
$PostCountArchivefiles  = ((Get-ChildItem $Archivefiles | Measure-Object ).Count)


$str1 = "Number of files in " + $ErrorFiles.ToString() + " was " + $PreCountErrorFiles.ToString()     + " number of files deleted " + ($PreCountErrorFiles - $PostCountErrorFiles).ToString() + " and "  +     $PostCountErrorFiles.ToString() + " are left." + "`n"  +
- "Number of files in " + $Archivefiles.ToString() + " was " + $PreCountArchivefiles.ToString() + "     number of files deleted " + ($PreCountArchivefiles - $PostCountArchivefiles).ToString() + " and "  +     $PostCountArchivefiles.ToString() + " are left." + "`n"

write-host $str1

谢谢你的帮助！

Answer 1

从第二行的开头删除连字符：

$str1 = "Number of files in " + $ErrorFiles.ToString() + " was " + $PreCountErrorFiles.ToString()     + " number of files deleted " + ($PreCountErrorFiles - $PostCountErrorFiles).ToString() + " and "  +     $PostCountErrorFiles.ToString() + " are left." + "`n"  +
- "Number of files in " + $Archivefiles.ToString() + " was " + $PreCountArchivefiles.ToString() + "     number of files deleted " + ($PreCountArchivefiles - $PostCountArchivefiles).ToString() + " and "  +     $PostCountArchivefiles.ToString() + " are left." + "`n"
^

在genereal中，格式运算符（-f）是构建字符串的更好方法：

$str1 = "Number of files in {0} was {1} number of files deleted {2} and {3} " +
        "are left.`nNumber of files in {4} was {5} number of files deleted " +
        "{6} and {7} are left.`n"
$str1 -f $ErrorFiles, $PreCountErrorFiles,
         ($PreCountErrorFiles - $PostCountErrorFiles),
         $PostCountErrorFiles, $Archivefiles, $PreCountArchivefiles,
         ($PreCountArchivefiles - $PostCountArchivefiles),
         $PostCountArchivefiles

Powershell将值转换为类型＆＃34; System32错误

1 个答案: