如何退出在系统托盘中运行的 powershell 脚本？

Question

我想通过用鼠标左键单击文本“退出”来退出这个系统托盘程序。当我将鼠标悬停时，鼠标会显示一个旋转的蓝色图标，而我点击却什么也没做。脚本有什么问题？

# a systray program, that should be exited (but it doesn't)
# 2023-03-18


$iconPath = "H:\Dropbox\400 - Scriptprogrammierung\Powershell\Taskleiste mit Wochentag\icons\ico\Logo.ico" # icon path
Write-Host -ForegroundColor Yellow $iconPath
$tooltip = "This is a text."

# NotifyIcon-object
$notifyIcon = New-Object System.Windows.Forms.NotifyIcon
$notifyIcon.Icon = [System.Drawing.Icon]::ExtractAssociatedIcon($iconPath)
$notifyIcon.Text = $tooltip

########################
# Here seems to be the problem...
$contextMenu = New-Object System.Windows.Forms.ContextMenuStrip
$menuItemExit = New-Object System.Windows.Forms.ToolStripMenuItem
$menuItemExit.Text = "Quit."
$contextMenu.Items.Add($menuItemExit)
$notifyIcon.ContextMenuStrip = $contextMenu
$menuItemExit.add_Click({ $notifyIcon.Dispose(); exit })
########################

# Show icon in systray
$notifyIcon.Visible = $true

# Loop
while ($true) {
    $notifyIcon.Text = $tooltip
    Start-Sleep -Seconds 60 # wait 60 seconds
}

Answer 1

所需的关键变化是：

• 不要直接从

  exit

  事件处理程序脚本块调用

  .add_Click()

  ：它会使您的脚本崩溃。

  • 下面的代码还将

    $notifyIcon.Dispose()

    移出此脚本块，而是将其移动到包装

    finally

    循环的

    try

    语句的

    while

    块中，而是通过以下方式通知希望退出的循环脚本级

    $done

    变量，通过事件处理程序中的

    $script:done = $true

    设置（在脚本的 child 范围内运行）。

  • 这确保使用 Ctrl-C 终止脚本也能正确处理图标并将其从通知区域中删除。

• 在您的

  while

  循环中，您必须定期调用

  [System.Windows.Forms.Application]::DoEvents()

  以允许 WinForms 处理其 UI 事件。在这些调用之间只休眠 short，以保持 UI 响应 - 长时间休眠会在该休眠期间阻止事件处理。

# Load the WinForms assembly.
Add-Type -AssemblyName System.Windows.Forms

$iconPath = "H:\Dropbox\400 - Scriptprogrammierung\Powershell\Taskleiste mit Wochentag\icons\ico\Logo.ico" # icon path
$tooltip = "This is a text."

# NotifyIcon-object
$notifyIcon = New-Object System.Windows.Forms.NotifyIcon
$notifyIcon.Icon = [System.Drawing.Icon]::ExtractAssociatedIcon($iconPath)
$notifyIcon.Text = $tooltip

# Define a script-level variable that indicates whether the
# script should be exited, to be set to $true from the .add_Click() event handler.
$done = $false

$contextMenu = New-Object System.Windows.Forms.ContextMenuStrip
$menuItemExit = New-Object System.Windows.Forms.ToolStripMenuItem
$menuItemExit.Text = "Quit."
$null = $contextMenu.Items.Add($menuItemExit)
$notifyIcon.ContextMenuStrip = $contextMenu
# Set the script-level $done variable to $true when the menu item is clicked.
$menuItemExit.add_Click({ $script:done = $true })

# Show icon in systray (notification area)
$notifyIcon.Visible = $true

Write-Verbose -Verbose @"
Adding icon to notification area (system tray).
Use the icon's context menu to quit this script or press Ctrl-C.
"@

# Loop
try {
  while (-not $done) {
      # IMPORTANT: Make WinForms process its events.
      [System.Windows.Forms.Application]::DoEvents()
      # Sleep just a little, to keep the UI responsive.
      Start-Sleep -MilliSeconds 100
  }
}
finally {
  $notifyIcon.Dispose()
}