使用復選框在gui中復制檔案

我正在 powershell 中創建一個用于復制檔案的 gui。首先我添加一個帶有按鈕的檔案，接下來我選擇要復制的檔案夾，然后我要復制。不幸的是，腳本說檔案路徑為空。我怎么解決這個問題？此外，我想添加 2 個功能。

• 如果未標記復選框，則發出警告

• 選擇按鈕旁邊的文本欄位，我可以在其中看到要復制的檔案的路徑

  $PSDefaultParameterValues['*:Encoding'] = 'ascii'
  Add-Type -AssemblyName System.Windows.Forms
  Add-Type -AssemblyName System.Drawing
  
  #create form
  $form             = New-Object System.Windows.Forms.Form
  $form.Width       = 500
  $form.Height      = 300
  $form.MaximizeBox = $false
  
  #choose file button
  $Button          = New-Object System.Windows.Forms.Button
  $Button.Location = New-Object System.Drawing.Size(10,10)
  $Button.Size     = New-Object System.Drawing.Size(150,50)
  $Button.Text     = "choose file"
  $Button.Add_Click({
  Function Get-FileName($initialDirectory) {  
  [System.Reflection.Assembly]::LoadWithPartialName(“System.windows.forms”) | Out-Null
  $OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog
  $OpenFileDialog.initialDirectory = $initialDirectory
  $OpenFileDialog.filter = “All files (*.*)| *.*”
  $OpenFileDialog.ShowDialog() | Out-Null
  $OpenFileDialog.filename
  } 
  
  $file = Get-FileName -initialDirectory “c:”
  })
  $form.Controls.Add($Button)
  
  #create checkbox1
  $checkBox          = New-Object System.Windows.Forms.CheckBox
  $checkBox.Location = New-Object System.Drawing.Point (10, 100)
  $checkBox.Size     = New-Object System.Drawing.Size(350,30)
  $checkBox.Text     = "folder 1"
  $form.Controls.Add($checkBox)
  
  #create checkbox2
  $checkBox2          = New-Object System.Windows.Forms.CheckBox
  $checkBox2.Location = New-Object System.Drawing.Point (10, 150)
  $checkBox2.Size     = New-Object System.Drawing.Size(350,30)
  $checkBox2.Text     = "folder 2"
  $form.Controls.Add($checkBox2)
  
  #copy file button
  $Button2          = New-Object System.Windows.Forms.Button
  $Button2.Location = New-Object System.Drawing.Size(10,200)
  $Button2.Size     = New-Object System.Drawing.Size(150,50)
  $Button2.Text     = "copy file"
  $Button2.Add_Click({    
  
  #checkbox1 action
  if ($checkBox.Checked -eq $true)
  {
  copy-item -Path $file -Destination "C:\folder 1"
  }
  
  #checkbox2 action
  if ($checkBox2.Checked -eq $true)
  {
  copy-item -Path $file -Destination "C:\folder 2"
  }
  
  })
  $form.Controls.Add($Button2)
  
  #end
  [void]$form.ShowDialog()
  

uj5u.com熱心網友回復：

有很多改進建議，但讓我們專注于您的問題：

問題是您的$file 變數的范圍是函式 Get-Filename的本地。因此，當從函式外部訪問時，它始終為空。

如評論中所述，您的腳本作業的最小修改是更改以下行（為了清楚起見，我還建議最初在函式外部宣告它，在全域級別）：

# From this
$file = Get-FileName -initialDirectory "c:"

# To this
$Global:file = Get-FileName -initialDirectory "c:"

要添加具有所選檔案名的文本框，請按照其他控制元件進行操作：

#Text box with choosen file name
$txtBox          = New-Object System.Windows.Forms.TextBox
$txtBox.Location = New-Object System.Drawing.Point (180, 20)
$txtBox.Size     = New-Object System.Drawing.Size(280,20)
$form.Controls.Add($txtBox)

要更新文本，請在設定 $Global:file 變數后添加以下行：

$Global:file = Get-FileName -initialDirectory "c:"
$txtBox.Text = $Global:file

最后，如果您將以下代碼添加到$Button2.Add_Click代碼，則會顯示一條訊息：

#nothing checked
if(($checkBox.Checked -eq $false) -and ($checkBox.Checked -eq $false)) {
    [System.Windows.Forms.Messagebox]::Show("No CheckBox checked")
}

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