PowerScript：System.Windows.Forms.FolderBrowserDialog 在后台打开

Question

PowerScript Noob 在这里。

我发现了一段代码，它允许用户通过文件夹浏览器对话框选择文件夹，而不是手动输入文件夹的路径。

按预期工作，除了文件夹浏览器对话框经常在屏幕上的其他窗口后面打开，这越来越令人厌烦。

代码如下：

Function Get-Folder($initialDirectory)

{
    [System.Reflection.Assembly]::LoadWithPartialName("System.windows.forms")|Out-Null

    $foldername = New-Object System.Windows.Forms.FolderBrowserDialog
    $foldername.Description = "Select a folder"
    $foldername.rootfolder = "MyComputer"
    $foldername.SelectedPath = $initialDirectory

    if($foldername.ShowDialog() -eq "OK")
    {
        $folder += $foldername.SelectedPath
    }
    return $folder
}

$FolderNavn = Get-Folder($StartFolder)

如何让文件夹浏览器对话框“在”所有其他 Windows 之上打开？

谢谢。

Answer 1

要设置 BrowseForFolder 对话框 TopMost，您需要使用 ShowDialog() 重载方法和指定对话框所有者（父）表单的参数。

我认为最简单的方法是创建一个属性 Topmost 设置为 $true 的新表单并将其用作所有者表单：

function Get-Folder {
    [CmdletBinding()]
    param (
        [Parameter(Mandatory=$false, ValueFromPipeline=$true, ValueFromPipelineByPropertyName=$true, Position=0)]
        [string]$Message = "Please select a directory.",

        [Parameter(Mandatory=$false, Position=1)]
        [string]$InitialDirectory,

        [Parameter(Mandatory=$false)]
        [System.Environment+SpecialFolder]$RootFolder = [System.Environment+SpecialFolder]::Desktop,

        [switch]$ShowNewFolderButton
    )
    Add-Type -AssemblyName System.Windows.Forms
    $dialog = New-Object System.Windows.Forms.FolderBrowserDialog
    $dialog.Description  = $Message
    $dialog.SelectedPath = $InitialDirectory
    $dialog.RootFolder   = $RootFolder
    $dialog.ShowNewFolderButton = if ($ShowNewFolderButton) { $true } else { $false }
    $selected = $null

    # force the dialog TopMost
    # Since the owning window will not be used after the dialog has been 
    # closed we can just create a new form on the fly within the method call
    $result = $dialog.ShowDialog((New-Object System.Windows.Forms.Form -Property @{TopMost = $true }))
    if ($result -eq [Windows.Forms.DialogResult]::OK){
        $selected = $dialog.SelectedPath
    }
    # clear the FolderBrowserDialog from memory
    $dialog.Dispose()
    # return the selected folder
    $selected
}