Powershell GUI如何使用选定的文件夹并将其项目复制到另一个驱动器中的其他文件夹中

使用powershell和XAML，我希望用户选择所选文件夹，然后将其中一个子文件夹（例如subfolder1）中的内容复制到不同驱动器中的另一个目录（比如“C”驱动器） . 一切正常，除非我包含评论 . 代码说明：用户点击“选择”按钮，然后选择所需的文件夹 . 此文件夹路径显示在名为“sourcePath”的列表框中 . 接下来，用户在文本框中的“directoryName”中键入所需的名称（例如“folderA”） . 当用户按下“创建”按钮时，如果存在“folderA”，则将使用“Remove-Item C：\ $ var -Recurse -Force”删除它，并使用“Copy-Item -Path C：\”再次创建$ a“\ subfolder1 C：\ $ var -Recurse” . 最后，使用“Copy-Item -Path C：\”$ a“C：\ $ var -Recurse”，我希望将“subfolder1”内容复制到这个“folderA”上 .

$XAML = @'
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Folder-Browser"
Height="500"
Width="600"
>
<Grid>
 <Button Name="create" Content="create" HorizontalAlignment="Left"    
 Margin="158,175,0,0" VerticalAlignment="Top" Width="121" />
 <TextBox Name="directoryName" HorizontalAlignment="Left" Height="23"  
 Margin="33,175,0,0" TextWrapping="Wrap" Text="directoryName"  
 VerticalAlignment="Top" Width="120"/>   
 <Button Name="choose" Content="choose" HorizontalAlignment="Left"  
 Margin="32,47,0,0" VerticalAlignment="Top" Width="121" />
 <ListBox Name="sourcePath" HorizontalAlignment="left" Height="45" 
 Margin="32,87,0,0" VerticalAlignment="Top" Width="430"/>
 <Button Name="copyItems" Content="copy-items" HorizontalAlignment="Left" 
 Margin="284,176,0,0" VerticalAlignment="Top" Width="121"   
 AutomationProperties.Name="copyItems" />    
</Grid>
</Window>
'@

#Parse XAML
$Win = [Windows.Markup.XamlReader]::Parse($XAML)

# Define variables
$sourcePath = $Win.FindName("sourcePath")
$choose= $Win.FindName("choose")
$directoryName=$Win.FindName("directoryName")
$create=$Win.FindName("create")
$copyItems=$Win.FindName("copyItems")


#Event Handling
$choose.Add_Click({Select-FolderDialog})
# $a =$objForm.SelectedPath()

Add-Type -Assembly System.Windows.forms


$create.Add_Click({
$script:var = $directoryName.Text.ToString()
Remove-Item C:\$var -Recurse -Force
new-item c:\$var -itemType directory
# cannot achieve copy the contents from the "SelectedFolder\subfolder1" onto
# the new "directoryName" created. 
# Copy-Item -Path C:\"$a"\subfolder1 C:\$var -Recurse
})


# Functions
#  "Select-FolderDialog" is used for the "choose" button
function Select-FolderDialog  
{
 param([String]$Description="Select Folder", 
    [String]$RootFolder="Desktop")   

 $objForm = New-Object System.Windows.Forms.FolderBrowserDialog
 $objForm.Rootfolder = $RootFolder
 $objForm.Description = $Description
 $Show = $objForm.ShowDialog()
 if ($Show -eq "OK")
  {
    $SourcePath.Items.Add($objForm.SelectedPath)
  }
}

$Win.ShowDialog()