如果已经运行，则阻止应用程序启动 [英] Prevent application launch if already running

问题描述

我的应用程序需要在启动时检查它是否已经在运行，以便它不会再次打开.我有一个系统托盘图标，可以使应用程序可见 = False.效果很好.然而，如果应用程序已经在运行，我需要确保用户查看系统托盘中的通知图标.

Private Sub mainWindowSmall_Load(sender As Object, e As EventArgs) 处理MyBase.LoadDim p() 作为进程p = Process.GetProcessesByName("TSC 工具箱")如果 p.Count >0 那么MessageBox.Show("TSC 工具箱已经在运行.检查系统托盘！", _警告！！！"，MessageBoxButtons.OK，_MessageBoxIcon.Error, MessageBoxDefaultButton.Button2)我.Close()别的总加载()万一结束子

VB.NET |winforms

解决方案

此功能已内置到 Windows 窗体中.只需转到项目属性并单击单实例应用程序"复选框.还有一个您可以处理的StartupNextInstance事件.>

My app needs to check and see if it is already running when launching so it doesn't open a second time. I have a system tray icon that can make the application visible = False. Works great. However, I need to make sure the user looks at the system tray for the notifyicon if the app is already running.

Private Sub mainWindowSmall_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim p() As Process
        p = Process.GetProcessesByName("TSC Tool Box")
        If p.Count > 0 Then
            MessageBox.Show("The TSC Tool Box is already running. Check System tray!", _
            "Warning !!!", MessageBoxButtons.OK, _
            MessageBoxIcon.Error, MessageBoxDefaultButton.Button2)
            Me.Close()
        Else
            totalOnLoad()
        End If
    End Sub

VB.NET | winforms

解决方案

This feature is already built in to Windows Forms. Just go to the project properties and click the "Single Instance Application" checkbox. There's also a StartupNextInstance event that you can handle.

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