c# - VSTO 加载项窗体关闭处理程序

Question

我有一个用于 outlook 2013 的 VSTO 插件。我正在尝试使用事件处理程序为表单关闭事件注册一个事件。

这是我在 Form1 类中的代码:

    public delegate void MyEventHandler();
    private event MyEventHandler Closing;

    private void OtherInitialize()
    {
        this.Closing += new MyEventHandler(this.Form1_Closing);
    }

同样来自 Form1 类:

    public Form1()
    {
        InitializeComponent();
        OtherInitialize();
    }

    private void Form1_Closing(object sender, CancelEventArgs e)
    {
        // Not sure what to put here to make the application exit completely
        // Looking for something similar to Pytthon's sys.exit() or
        // Applicaton.Exit() in Forms Applicatons, I tried
        // Applicaton.Exit() it did not work
    }

当我运行它时，我收到错误和警告:

警告:

Form1.Closing hides inherited member System.Windows.Forms.Form.Closing.  Use the new keyword if hiding was intended

错误:

No overload for Form1_Closing matches delegate System.EventHandler

这些错误/警告是什么意思？当使用 X 按钮或 form.Close() 关闭表单时，如何正确注册 Form1_Closing 事件处理程序现在我可以调用 form.Close() 但它似乎不会触发 Form1_Closing 事件.

Answer 1

不需要声明 Closing 事件，因为父类提供了开箱即用的事件。此外，您可以简单地设置事件处理程序而无需声明委托(delegate)类(最新的 .net 版本):

public Form1()
{
    InitializeComponent();
    OtherInitialize();
}

private void OtherInitialize()
{
    Closing += Form1_Closing;
}

private void Form1_Closing(object sender, CancelEventArgs e)
{
    // Not sure what to put here to make the application exit completely
    // Looking for something similar to Pytthon's sys.exit() or
    // Applicaton.Exit() in Forms Applicatons, I tried
    // Applicaton.Exit() it did not work
}