blocks|key|812980|text|使用FormClosing事件应该捕获关闭窗体的任何方式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|812981|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Using the FormClosing Event should catch any way of closing the form.

blocks|key|1269143|text|在窗体的“设计”视图中的“属性”窗口中，选择“事件”按钮，然后向下滚动到"FormClosed“和"FormClosing”事件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1269144|FormClosed在窗体关闭后调用。|1269145|FormClosing在窗体关闭之前调用，还允许您取消关闭，使窗体保持打开状态：|1269146|private+void+Form1_FormClosing(object+sender,+FormClosingEventArgs+e)
{
++++e.Cancel+=+true;
}|code-block|syntax|javascript|1269147|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In the Design view for your form, within the Properties window, select the Events button and scroll down to the "FormClosed" and "FormClosing" events.

FormClosed is called after the form is closed.

FormClosing is called before the form is closed and also allows you to cancel the close, keeping the form open:

<pre><code>private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
 e.Cancel = true;
}
</code></pre>

blocks|key|4031737|text|如果您想询问用户“您确定要关闭此表单吗？”，则使用FormClosing，您可以在其中设置Cancel+=+True，并且表单将保持打开状态。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4031738|如果您只想在窗体确定关闭时才关闭某些资源，则可以使用FormClosed事件。|4031739|如果你控制了整个代码，那就没什么关系了。但是，当事件的另一个处理程序将保持窗体打开时，您不希望发生的情况是使用FormClosing清理资源。|4031740|entityMap^0|P|B|19|D|0|Q|A|0|1J|B|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|K|$]]

If you want to ask the user "Are you sure you want do close this form?", then use <code>FormClosing</code>, where you can set <code>Cancel = True</code> and the form would remain open.

If you want to close some resource only when the form is definitely closed, then you use <code>FormClosed</code> event.

If you are in control of the whole code, then it kind of does not matter. But what you do not want to happen is to clean-up the resources using <code>FormClosing</code> when the the other handler of the event will keep the form open.

blocks|key|4876918|text|使用你的winform的闭合事件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4876919|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Use the Closed-Event of your winform.

blocks|key|1272832|text|FormClosing/FormClosed允许您查看该窗体的事件，该事件可能与应用程序退出同时发生。但是，您可以连接另一个名为Application.ApplicationExit的事件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1272833|在你的Main方法中：|1272834|Application.ApplicationExit+%2B=+Application_ApplicationExit;

...

private+static+void+Application_ApplicationExit(object+sender,+EventArgs+e)+{

++//+do+stuff+when+the+application+is+truly+exiting,+regardless+of+the+reason

}|code-block|syntax|javascript|1272835|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

FormClosing/FormClosed lets you watch the event for that form which may coincide with the application exiting. However, there is another event you can wire up called Application.ApplicationExit.

In your Main method:

<pre><code>Application.ApplicationExit += Application_ApplicationExit;

...

private static void Application_ApplicationExit(object sender, EventArgs e) {

 // do stuff when the application is truly exiting, regardless of the reason

}
</code></pre>

blocks|key|4031705|text|这段代码将捕获用户单击“X”或在表单上使用Alt-F4以允许您执行某些操作的过程。我必须使用它，因为我需要动作来调用我的关闭事件，而当使用FormClosing事件时，由于竞速事件，它不会调用它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4031706|///+<summary>
///+This+code+captures+the+'Alt-F4'+and+the+click+to+the+'X'+on+the+ControlBox
///+and+forces+it+to+call+MyClose()+instead+of+Application.Exit()+as+it+would+have.
///+This+fixes+issues+where+the+threads+will+stay+alive+after+the+application+exits.
///+</summary>
public+const+int+SC_CLOSE+=+0xF060;
public+const+int+WM_SYSCOMMAND+=+0x0112;
protected+override+void+WndProc(ref+System.Windows.Forms.Message+m)
{
++++if+(m.Msg+==+WM_SYSCOMMAND+&&+(int)m.WParam+==+SC_CLOSE)
++++++++MyClose();

++++base.WndProc(ref+m);
}|code-block|syntax|javascript|4031707|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This code will capture the user clicking on the 'X' or using Alt-F4 on a form to allow you to do something. I had to use this because the I needed the action to call my closing event, and it wouldn't call it when using the FormClosing Event due to racing events.

<pre><code>/// &lt;summary&gt;
/// This code captures the 'Alt-F4' and the click to the 'X' on the ControlBox
/// and forces it to call MyClose() instead of Application.Exit() as it would have.
/// This fixes issues where the threads will stay alive after the application exits.
/// &lt;/summary&gt;
public const int SC_CLOSE = 0xF060;
public const int WM_SYSCOMMAND = 0x0112;
protected override void WndProc(ref System.Windows.Forms.Message m)
{
 if (m.Msg == WM_SYSCOMMAND &amp;&amp; (int)m.WParam == SC_CLOSE)
 MyClose();

 base.WndProc(ref m);
}
</code></pre>

blocks|key|4877113|text|双击form‘’design中的exit按钮，然后简单地调用Dispose()方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4877114|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

double click the exit button in form'design then
simply call the Dispose() method

blocks|key|1269217|text|表单操作方法//|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1269218|+protected+override+void+OnFormClosing(FormClosingEventArgs+e)

++++++++++{
++++++++++base.OnFormClosing(e);

++++++++++if+(e.CloseReason+==+CloseReason.WindowsShutDown)+return;

+++++++++++++++switch+(MessageBox.Show(this,+"Are+you+sure+you+want+to+exit?",+"Exit",+MessageBoxButtons.YesNo))
+++++++++++++++++++++{
+++++++++++++++++++++++case+DialogResult.No:
+++++++++++++++++++++++++++e.Cancel+=+true;
+++++++++++++++++++++++++++break;
+++++++++++++++++++++default:
++++++++++++++++++++++++++break;
+++++++++++++++++++++}
+++++++++}|code-block|syntax|javascript|1269219|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Form action method
//

<pre><code> protected override void OnFormClosing(FormClosingEventArgs e)

 {
 base.OnFormClosing(e);

 if (e.CloseReason == CloseReason.WindowsShutDown) return;

 switch (MessageBox.Show(this, "Are you sure you want to exit?", "Exit", MessageBoxButtons.YesNo))
 {
 case DialogResult.No:
 e.Cancel = true;
 break;
 default:
 break;
 }
 }
</code></pre>

blocks|key|4031773|text|+You+can+use+form+closing+events+choose+or+set+closing+event+in++properties+window++++++
+You+can+add+dialog+conditions+based+on+what+task+you+want+to+perform+before+closing+form

private+void+Form1_FormClosing(object+sender,FormClosingEventArgs+e)
{
Application.Exit();
//you+can+also+use+Application.ExitThread();
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4031774|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> You can use form closing events choose or set closing event in properties window 
 You can add dialog conditions based on what task you want to perform before closing form

private void Form1_FormClosing(object sender,FormClosingEventArgs e)
{
Application.Exit();
//you can also use Application.ExitThread();
}
</code></pre>

I'm using Microsoft Visual C# 2008 Express.

In my main form, there's that X button to close the form at the top right. How do I add code to this button? In my menu, I have an "Exit" item and it has code that cleans up and closes my databases. How do I add the same code to this button if the user chooses that as a way to exit?

Thanks!

-Adeena

How do I add code to the exit button in a c# form?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在使用Microsoft Visual C# 2008学习版。在我主窗体中，有一个X按钮用于关闭右上角的窗体。如何向此按钮添加代码？在我的菜单中，我有一个“退出”项，它有清理和关闭我的数据库的代码。如果用户选择退出，如何将相同的代码添加到此按钮？谢谢!-Adeena

问如何向c#窗体中的“退出”按钮添加代码？
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回答 9

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