https:www.cnblogs.comXinruiIIiiiiip14648323.htmlC#(winform)记录阻止关闭页面方法e.Cancelfals https://www.cnblogs.com/XinruiIIiiiii/p/14648323.html C#(winform)记录阻止关闭页面方法 e.Cancel = false; //不拦截，响应操作
https://www.cnblogs.com/XinruiIIiiiii/p/14648323.html
C#(winform)记录阻止关闭页面方法
e.Cancel = false; //不拦截，响应操作