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VB.Net中确认退出对话框的实现,
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在敲代码的时候,为了更加人性化的设计,我们在用户退出系统之前需要进行提示,如下图:
实现方法分为两大类:窗体事件和控件事件,下面就一一展示:
一、FormClosing事件(又分以下几种方法)
a.
- Private Sub frmPractise_FormClosing(ByVal sender As Object,ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
- If MessageBox.Show("确定退出吗?","退出确认",MessageBoxButtons.YesNo,MessageBoxIcon.Question) = Windows.Forms.DialogResult.No Then
- e.Cancel = True
- End If
- End Sub
b.
- Private Sub Practise_FormClosing(ByVal sender As Object,ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
- If MsgBox("确定退出吗?",MessageBoxButtons.OKCancel,"退出确认") = Windows.Forms.DialogResult.Cancel Then
- e.Cancel = True
- End If
- End Sub
c.
- Private Sub Practise_FormClosing(ByVal sender As Object,ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
- Dim p As Integer
- p = MsgBox("你真的要退出系统吗?",MsgBoxStyle.OkCancel,"提示")
- If p = 2 Then
- e.Cancel = True
- End If
- End Sub
d.(最为简单)
- Private Sub Practise_FormClosing(ByVal sender As Object,ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
- If MsgBox("你确认要退出程序吗?","退出提示") = MsgBoxResult.Cancel Then e.Cancel = True
- End Sub
以上只是点击窗口关闭按钮时的用法,若直接在窗体控件上点击退出时,可以用以下方式实现:
二、Button_Click事件
- Private Sub btnQuit_Click(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles btnQuit.Click
-
- If MsgBox("是否要退出系统?",MsgBoxStyle.YesNo + MsgBoxStyle.Question,"提示") = MsgBoxResult.Yes Then
- Application.Exit()
- End If
-
- End Sub