表单切换时事件触发 [英] Event Fires When Form Switches

问题描述

我在MainPanel中创建了许多表单，添加到面板中



Form1 frm = new Form1（this）;

frm.TopLevel = false;

frm.AutoScroll = true;

frm.Dock = DockStyle.Fill;

frm.WindowState = FormWindowState.Maximized;

frm.Show（）;

this.MainPanel.Controls.Add（frm）;



当我在表格之间切换时，哪个事件正在运行？

i想要在用户在表单之间切换时工作

解决方案

你能尝试以下活动吗？

 private void Form1_Activated（object sender，System.EventArgs e）

此事件应该在表单已激活，即在此表单上收到焦点

请参阅Windows窗体事件生命周期：

移动：移动表单时发生此事件。虽然默认情况下，在实例化并启动表单时，用户不会移动它，但在Load事件发生之前会触发此事件。 
加载：此事件在首次显示表单之前发生。 
 VisibleChanged：当Visible属性值更改时，会发生此事件。 
已激活：在代码或用户激活表单时发生此事件。 
显示：每当首次显示表单时都会发生此事件。 
 Paint：重绘控件时会发生此事件。 
停用：当表单失去焦点且不是活动表单时，会发生此事件。 
结束：表单关闭时发生此事件。 
已关闭：此事件在表单关闭时发生。

有关详细信息，请参阅链接：

http：/ /stackoverflow.com/questions/3070163/order-of-events-form-load-form-shown-and-form-activated-in-windows-forms [ ^ ]

I Create many Form in my MainPanel Added To Panel by

Form1 frm = new Form1(this);
frm.TopLevel = false;
frm.AutoScroll = true;
frm.Dock = DockStyle.Fill;
frm.WindowState = FormWindowState.Maximized;
frm.Show();
this.MainPanel.Controls.Add(frm);

which event is running when i switch between forms?
i want to do job when user switch between forms

解决方案

Can you try the following event?

private void Form1_Activated(object sender, System.EventArgs e)

this event should fire when ever the form is activated, that is focus is received on this form

See the Windows Forms Events Lifecycle:

Move: This event occurs when the form is moved. Although by default, when a form is instantiated and launched, the user does not move it, yet this event is triggered before the Load event occurs.
Load: This event occurs before a form is displayed for the first time.
VisibleChanged: This event occurs when the Visible property value changes.
Activated: This event occurs when the form is activated in code or by the user.
Shown: This event occurs whenever the form is first displayed.
Paint: This event occurs when the control is redrawn.
Deactivate: This event occurs when the form loses focus and is not the active form.
Closing: This event occurs when the form is closing.
Closed: This event occurs when the form is being closed.

Refer the Link for details:
http://stackoverflow.com/questions/3070163/order-of-events-form-load-form-shown-and-form-activated-in-windows-forms[^]

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