.net Powershell - IO.Directory - 在所有子目录中查找文件类型
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Powershell - IO.Directory - Find file types in all subdirectories
提问by user2089287
I ran across this code in another post that almost does what I need, but can't figure out how to modify it to look for specific file types, i.e. *.bak, .txt, etc. I'm using Powershell with [System.IO.DirectoryInfo] because, like others have stated, using Get-ChildItem is too slow across the network. I thought it would just be something like $fileEntries = [IO.Directory]::GetFiles("C:\", ".bak"), but it still returns every file in every directory. --PS/.NET newbie
我在另一篇几乎满足我需要的帖子中遇到了这段代码，但无法弄清楚如何修改它以查找特定的文件类型，即 *.bak、.txt 等。我正在使用 Powershell 和 [System .IO.DirectoryInfo] 因为，正如其他人所说，使用 Get-ChildItem 在网络上速度太慢。我以为它只是类似于 $fileEntries = [IO.Directory]::GetFiles("C:\", ".bak")，但它仍然返回每个目录中的每个文件。--PS/.NET 新手
try
{
$fileEntries = [IO.Directory]::GetFiles("C:\")
[System.IO.DirectoryInfo]$directInf = New-Object IO.DirectoryInfo("C:\")
$folders = $directInf.GetDirectories()
}
catch [Exception]
{
$_.Exception.Message
$folders = @()
}
foreach($fileName in $fileEntries)
{
#[Console]::WriteLine($fileName);
}
Remove-Variable -ErrorAction SilentlyContinue -Name fileEntries
foreach($folder in $folders)
{
recurse("C:\" + $folder + "\")
}
回答by Musaab Al-Okaidi
This will loop through each extension searching for all files in the root and sub-directories. Ensure you have the correct privileges on all the directories especially when you're running from C:\ as the root.
这将遍历每个扩展名，搜索根目录和子目录中的所有文件。确保您对所有目录具有正确的权限，尤其是当您以根目录从 C:\ 运行时。
$Extensions = @(".bak",".csv",".txt")
Foreach ( $Extension in $Extensions )
{
[System.IO.Directory]::EnumerateFiles("C:\","*$Extension","AllDirectories")
}
This method will only work with Powershell running .Net 4.0 or higher. To check and update the version of .Net:
此方法仅适用于运行 .Net 4.0 或更高版本的 Powershell。要检查和更新 .Net 的版本：
$PSVersionTable
Name Value
---- -----
CLRVersion 2.0.50727.4971
BuildVersion 6.1.7600.16385
PSVersion 2.0
WSManStackVersion 2.0
PSCompatibleVersions {1.0, 2.0}
SerializationVersion 1.1.0.1
PSRemotingProtocolVersion 2.1
The CLRVersion value is the .net version.
CLRVersion 值是 .net 版本。
Update the config file as follows:
更新配置文件如下：
$Config = @"
<?xml version="1.0"?>
<configuration>
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0.30319"/>
<supportedRuntime version="v2.0.50727"/>
</startup>
</configuration>
"@
$Config > $PSHOME\Powershell.exe.config
Restart the Powershell session and verify the CLRVersion value in the $PSVersionTable variable.
重新启动 Powershell 会话并验证 $PSVersionTable 变量中的 CLRVersion 值。
回答by user2089287
This worked after creating a config file to use the .NET 4.0 Framework:
这在创建配置文件以使用 .NET 4.0 Framework 后起作用：
try{
$path = "\$Server$($drive.replace(':','$'))"
foreach ($filepath in [System.IO.Directory]::EnumerateFiles($path,"*.bak","AllDirectories"))
{
$file = New-Object System.IO.FileInfo($filepath)
write-host $file
# insert file into database table
}
}
catch [UnauthorizedAccessException]
{
$exception = $_.Exception.Message #I don't need to write/insert exception
}
回答by Manny
Here's a simple PowerShell script to move many files from a directory into a structured directory by year, month and day. This is very fast, I had over 500K files.
这是一个简单的 PowerShell 脚本，用于按年、月和日将许多文件从目录移动到结构化目录中。这非常快，我有超过 50 万个文件。
$listofFiles = [System.IO.Directory]::EnumerateFiles("D:\LotsOfFiles","*.*","TopDirectoryOnly")
$listofFiles |% {
$file = New-Object System.IO.FileInfo($_)
$date = Get-Date ($file.CreationTime)
$filepath = ("{0}\{1:00}\{2:00}-{3}\{4:00}\" -f "D:\LotsOfFiles", $date.year,
$date.month, $date.toString("MMM"), $date.day)
Write-Output ("Move: {0} to {1}" -f $file.Fullname, $filepath)
if (! (Test-Path $filepath)) {
new-item -type Directory -path $filepath
}
move-item $file $filepath
}
This probably can be improved but it works.
这可能可以改进，但它有效。
