PowerShell:根据参数创建一定数量的文件,使用 运行 数字来区分文件

PowerShell: Creating a set amount of files based on a parameter, with a running number to differentiate the files

所以我有一个任务,我必须创建一个带有三个参数的 PowerShell 脚本,“$foldername”、“$filename”和“$number”。

脚本检查文件夹“$foldername”是否存在,如果不存在,则创建它。之后,它会创建与“$number”指定的一样多的名为“$filename”的新文件。之后它会报告已创建了多少文件并列出它们。

到目前为止我有什么。

Param (
    [string]$foldername,
    [string]$filename,
    $number=1
)

if ((Test-Path -Path $foldername) -ne $true) {
    new-item -path $foldername -ItemType directory #if the folder doesn't exist, create it.
}
$new_file= $foldername+"$_"+$filename #save the path and name of the new file to an variable
if ((Test-Path -Path $new_file* -PathType leaf) -eq $true) {
    Write-Host "$filename already exists in $foldername"
    break #if a file with a name that contains $filename in it exists in $foldername, break and do not create any new files.
}   
$null=1..$number | foreach { new-item -path $foldername -name $_$filename } #create new files using foreach.
write-host ("Created $number new files") #tell the user how many files were created
Get-ChildItem -path $foldername | where-object Name -like *$filename* | format-table Name #show the created files in a table format, formatted by name

此脚本中存在一些问题和损坏的解决方案,但主要问题是新文件的创建。由于新文件的名称来自 $filename,因此只需 运行 脚本如下:

./script.ps1 -foldername C:\users\example\testing -filename "test.txt" -number 5

不会工作,因为它会尝试创建 5 个名为“test.txt”的文件,并且只会 return 错误。

我通过使用“foreach”并将创建的文件命名为 $_$filename 来解决它

1test.txt
2test.txt
...
5test.txt

但我发现正确的方法是:

test1.txt
test2.txt
...
test5.txt

文件名中的数字应该是 运行,但我不知道该怎么做。

如果您知道如何检查 $filename 文件是否已存在于目标文件夹中,可加分。

使用 Test-Path 很好,但我认为这里没有必要,您可以使用 $ErrorAction = 'Stop' 这样如果文件夹存在,脚本将立即停止并显示一条警告消息。另一方面,如果文件夹是新文件夹,则文件不可能已经存在。

Param (
    [parameter(Mandatory)]
    [string]$FolderName,
    [parameter(Mandatory)]
    [string]$FileName,
    [int]$Number = 1
)

$ErrorActionPreference = 'Stop'

try {
    $newFolder = New-Item -Path $FolderName -ItemType Directory
}
catch {
    # If the folder exists, show this exception and stop here
    Write-Warning $_.Exception.Message
    break
}

$files = 1..$Number | ForEach-Object {
    # If this is a new Folder, there is no way the files already exist :)
    $path = Join-Path $newFolder.FullName -ChildPath "$FileName $_.txt"
    New-Item -Path $path -ItemType File
}

Write-Host 'Script finished successfully.'
$newFolder, $files | Format-Table -AutoSize

编辑:我可能错过了要在文件夹中创建文件的地方,即使该文件夹已经存在,在这种情况下,您可以使用以下内容:

Param (
    [parameter(Mandatory)]
    [string]$FolderName,
    [parameter(Mandatory)]
    [string]$FileName,
    [int]$Number = 1
)

$ErrorActionPreference = 'Stop'

$folder = try {
    # If the Folder exists get it
    Get-Item $FolderName
}
catch {
    # If it does not, create it
    New-Item -Path $FolderName -ItemType Directory
}

$files = 1..$Number | ForEach-Object {
    $path = Join-Path $folder.FullName -ChildPath "$FileName $_.txt"
    try {
        # Try to create the new file
        New-Item -Path $path -ItemType File
    }
    catch {
        # If the file exists, display the Exception and continue
        Write-Warning $_.Exception.Message
    }
}

Write-Host "Script finished successfully."
Write-Host "Files created: $($files.Count) out of $Number"
$files | Format-Table -AutoSize