如何使 Windows 窗体 .NET 应用程序显示为托盘图标？

Question

需要做什么才能让您的 .NET 应用程序作为图标显示在 Window 的系统托盘中？

您如何处理该图标上的鼠标按钮点击？

Answer 1

首先，向形式。 然后连接通知图标以执行您想要的操作。

如果您希望它隐藏在最小化托盘上，请尝试此操作。

Private Sub frmMain_Resize(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Resize
    If Me.WindowState = FormWindowState.Minimized Then
        Me.ShowInTaskbar = False
    Else
        Me.ShowInTaskbar = True
    End If
End Sub

Private Sub NotifyIcon1_MouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles NotifyIcon1.MouseClick
    Me.WindowState = FormWindowState.Normal
End Sub

我偶尔会使用气球文本来通知用户 - 这样做是这样的：

 Me.NotifyIcon1.ShowBalloonTip(3000, "This is a notification title!!", "This is notification text.", ToolTipIcon.Info)

Answer 2

您可以将工具箱中的 NotifyIcon 组件添加到主窗体中。

它具有诸如 MouseDoubleClick 之类的事件，您可以使用它们来处理各种事件。

编辑：如果您希望图标正确显示在系统托盘中，则必须确保将 Icon 属性设置为有效的 .ico 文件。

Answer 3

为了扩展Tom的回答，我喜欢仅在应用程序最小化时使图标可见。
为此，请为 NotifyIcon 并使用以下代码。

我还有下面的代码可以在关闭期间隐藏图标，以防止应用程序关闭后仍然存在烦人的幽灵托盘图标。

Private Sub Form_Resize(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Resize
    If Me.WindowState = FormWindowState.Minimized Then
        Hide()
        NotifyIcon1.Visible = True
        NotifyIcon1.ShowBalloonTip(3000, NotifyIcon1.Text, "Minimized to tray", ToolTipIcon.Info)
    End If
End Sub

Private Sub NotifyIcon1_MouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles NotifyIcon1.MouseClick
    Show()
    Me.WindowState = FormWindowState.Normal
    Me.Activate()
    NotifyIcon1.Visible = False
End Sub

Private Sub Form_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
    NotifyIcon1.Visible = False
    Dim index As Integer
    While index < My.Application.OpenForms.Count
        If My.Application.OpenForms(index) IsNot Me Then
            My.Application.OpenForms(index).Close()
        End If
        index += 1
    End While
End Sub

如果要添加右键菜单：

VB.NET：如何为托盘图标制作右键菜单

根据文章（带有上下文的 mods） ):

设置用于承载托盘图标上下文菜单的表单

• 在属性中将 FormBorderStyle 设置为 None。
• 将 ShowInTaskbar 设置为 False（因为我们不希望右键单击托盘图标时任务栏中出现图标！）。
• 将“开始位置”设置为“手动”。
• 将 TopMost 设置为 True。
• 将 ContextMenuStrip 添加到新表单中，并将其命名为您想要的任何名称。
• 将项目添加到 ContextMenuStrip（对于本示例，只需添加一项名为“Exit”的项目）。

后面的表单代码如下所示：

Private Sub Form_Deactivate(sender As Object, e As EventArgs) Handles Me.Deactivate
    Me.Close()
End Sub

Private Sub Form_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ContextMenuStrip1.Show(Cursor.Position)
    Me.Left = ContextMenuStrip1.Left + 1
    Me.Top = ContextMenuStrip1.Top + 1
End Sub

Private Sub ExitToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles ExitToolStripMenuItem.Click
    MainForm.NotifyIcon1.Visible = False
    End
End Sub

然后，我将 notificationicon 鼠标事件更改为此（TrayIconMenuForm 是用于提供上下文菜单的表单的名称）：

Private Sub NotifyIcon1_MouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles NotifyIcon1.MouseClick
    Select Case e.Button
        Case Windows.Forms.MouseButtons.Left
            Show()
            Me.WindowState = FormWindowState.Normal
            Me.Activate()
            NotifyIcon1.Visible = False
        Case Windows.Forms.MouseButtons.Right
            TrayIconMenuForm.Show() 'Shows the Form that is the parent of "traymenu"
            TrayIconMenuForm.Activate() 'Set the Form to "Active", that means that that will be the "selected" window
            TrayIconMenuForm.Width = 1 'Set the Form width to 1 pixel, that is needed because later we will set it behind the "traymenu"
            TrayIconMenuForm.Height = 1 'Set the Form Height to 1 pixel, for the same reason as above
        Case Else
            'Do nothing
    End Select
End Sub