VB.net如何实现关闭窗口前询问是否要关闭？
一头雾水。各位高手请不吝赐教！
[解决办法]
Private Sub MDImain_FormClosed(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles Me.FormClosed
MessageBox.Show( "是否确定退出！！！ ", MessageBoxButtons.YesNo)
End Sub
[解决办法]
使用：Form.Closing 事件
[解决办法]
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If MsgBox( "是否关闭 ", MsgBoxStyle.Question Or MsgBoxStyle.OkCancel) = MsgBoxResult.Ok Then
Me.Dispose()
End If
End Sub
也就是写一个MSGBOX询问是否关闭，有YES和NO两个选项，当点击YES时，执行ME.DISPOSE。关闭窗口。
[解决办法]
Private Sub Form1_Closing(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
If MsgBox( "是否关闭 ", MsgBoxStyle.YesNo, "提示 ") = MsgBoxResult.Yes Then
Me.Close()
Else
Exit Sub
End If
End Sub
[解决办法]
Private Sub AskForExit(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
'退出操作确认
Dim close As DialogResult
close = MessageBox.Show( "确认要退出？ ", "提示 ", MessageBoxButtons.YesNo, MessageBoxIcon.Asterisk)
If close = Windows.Forms.DialogResult.Yes Then
Me.Dispose()
Else
e.Cancel = True
End If
End Sub
