如何知道usercontrol(form)是否关闭? [英] How to know usercontrol(form) is closing or not?

问题描述

大家好

如何知道usercontrol(form)是否关闭?

让我知道

我的代码

hi all

How to know usercontrol(form) is closing or not?

let me know

my code

//pageload
this.ParentForm.FormClosing += new FormClosingEventHandler(ParentForm_FormClosing);

void ParentForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            UpdateAll();
        }

它不起作用

在此先感谢

it''s not working

Thanks in advance

推荐答案

对我来说效果很好:

It works fine for me:

void ParentForm_FormClosing(object sender, FormClosingEventArgs e)
    {
    Console.WriteLine("Form closing");
    }

private void UserControl1_Load(object sender, EventArgs e)
    {
    ParentForm.FormClosing += new FormClosingEventHandler(ParentForm_FormClosing);
    }

检查是否已为控件连接了Load事件处理程序.

Check that you have hooked up the Load event handler for your control.

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