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VB.NET：中止 FormClosing()

发布于 2024-08-21 08:26:37 字数 283 浏览 8 评论 0原文

我有一个代码片段，我想在应用程序关闭时运行。因此，我使用了 FormCLosing 事件。但现在我想放置一条退出确认消息。例如，如果用户单击“退出”(X) 按钮，则会出现提示，如果单击“否”，则应用程序不会关闭并恢复到之前的状态。

现在我发现使用 FormClosing 事件很难实现。因为无论用户单击哪个按钮它都会被执行。有什么补救办法吗？

我的意思是，我需要一个像 ExitButtonPressed()..

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水溶 2024-08-28 08:26:37

您可以尝试

Private Sub Form1_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing
    If (MessageBox.Show("Close?", "", MessageBoxButtons.YesNo) = Windows.Forms.DialogResult.No) Then
        e.Cancel = True
    End If
End Sub

查看

FormClosingEventArgs Class

和

CancelEventArgs.Cancel 属性

可以通过设置取消活动
将 Cancel 属性设置为 true。

You could try something like

Private Sub Form1_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing
    If (MessageBox.Show("Close?", "", MessageBoxButtons.YesNo) = Windows.Forms.DialogResult.No) Then
        e.Cancel = True
    End If
End Sub

Have a look at

FormClosingEventArgs Class

And

CancelEventArgs.Cancel Property

The event can be canceled by setting
the Cancel property to true.

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烟雨凡馨 2024-08-28 08:26:37

'表单的 Button2 和 closebutton 都关闭表单，询问相同的'问题

Dim button2Yes As Boolean = False
Private Sub Button2_Click(sender As Object, e As EventArgs) 处理 Button2.Click

    If MessageBox.Show("    Sure to close?   ", "CLOSING CONTROL", MessageBoxButtons.YesNo, MessageBoxIcon.Question) = DialogResult.Yes Then
        button2Yes = True
        Me.Close()
    Else
        button2Yes = False
    End If
End Sub

Private Sub Form1_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles Me.FormClosing
    If Not button2Yes Then
        If Not MessageBox.Show("    Sure to close?   ", "CLOSING CONTROL", MessageBoxButtons.YesNo, MessageBoxIcon.Question) = DialogResult.Yes Then
            e.Cancel = True
        End If
    End If
End Sub

'Button2 and closebutton of the form both closes the form asking the same 'question

Dim button2Yes As Boolean = False
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click

    If MessageBox.Show("    Sure to close?   ", "CLOSING CONTROL", MessageBoxButtons.YesNo, MessageBoxIcon.Question) = DialogResult.Yes Then
        button2Yes = True
        Me.Close()
    Else
        button2Yes = False
    End If
End Sub

Private Sub Form1_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles Me.FormClosing
    If Not button2Yes Then
        If Not MessageBox.Show("    Sure to close?   ", "CLOSING CONTROL", MessageBoxButtons.YesNo, MessageBoxIcon.Question) = DialogResult.Yes Then
            e.Cancel = True
        End If
    End If
End Sub

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