Question

C# dockpanel 窗体切换会触发那个事件

dockpanel 中显示了多个窗体 切换显示的窗体时触发那个事件

Answer 1

在窗体关闭事件FormClosing中写上e.cancel==true,示例代码如下：private void MainForm_FormClosing(object sender, FormClosingEventArgs e) { if (e.CloseReason == CloseReason.UserClosing) { DialogResult r = MessageBox.Show("确定要退出程序?", "操作提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question); if (r != DialogResult.OK) { e.Cancel = true; } } }