如何检测外部的wm_close与由form.close()内部触发的差异 [英] How to detect differentiate external wm_close vs internally triggered by form.close()

问题描述

这是一个C#应用程序，作为一个notifyicon放置在托盘中，并执行其操作，直到有人右键单击它并选择关闭(菜单选项)，或者它从外部应用程序或通过操作系统在重新启动过程中获取wm_close为止.

This is a C# app that sits in the tray as a notifyicon and does its stuff until someone right clicks it and selects close (menu option) or it gets a wm_close from an external app or by the operating system say during a reboot.

protected override void WndProc(ref Message m)
{
   case  Win32.WmClose:
  //recvd message to shutdown
   Program.Log.InfoFormat("Shutdown received at {0}", DateTime.Now);
   CleanUp();
   this.Close(); //this is the main form
   break;

   //other case statements here
}

//somewhere else on menu exit of notify icon
 private void toolStripMenuItemExit_Click(object sender, EventArgs e)
 {
        Program.Log.InfoFormat("Manual EXIT at {0}", DateTime.Now);
        CleanUp();
        this.Close(); //this is the main form
 }

this.close()触发另一个WM_CLOSE，以拖尾的方式发送应用程序.解决这种情况的正确方法是什么?谢谢

The this.close() triggers another WM_CLOSE sending the app in a tailspin. What is the correct way to handle this situation ? thank you

推荐答案

处理表单Closing事件.并且只要您想退出，只需调用Close();，并使其他任何操作都依赖于close事件内部的close而不是在WndProc和toolStripMenuItemExit_Click处进行处理，所以:

Handle form Closing event. and whenever you want to exit just call Close();, and make any other operation rely on closing inside the closing event instead of handling it at WndProc and toolStripMenuItemExit_Click, so:

private void OnFormCloseing(object sender, FormClosingEventArgs e)
{
    string reason = string.Empty;
    switch (e.CloseReason)
    {
        case CloseReason.UserClosing:
            reason = "Manual EXIT";
            break;

        case CloseReason.WindowsShutDown:
            reason = "Shutdown received";
            break;
    }
    Program.Log.InfoFormat(reason + " at {0}", DateTime.Now);
    CleanUp();
}

private void toolStripMenuItemExit_Click(object sender, EventArgs e)
{
    this.Close(); //this is the main form
}

CloseReason的更多成员此处.

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