当我们通过快捷键Alt + F4关闭时如何获取确认框

问题描述

我想在使用c#.net中的Alt + F4快捷键关闭应用程序时得到确认框，

I would like to get the confirmation box when we close the application by using Shortcut key that is Alt+F4 in c#.net can any one help

推荐答案

document.onkeydown = keydown;
function keydown(evt)
{
  if (!evt)
     evt = event;
  if (evt.altKey && evt.keyCode==115)
  {
     // ALT+F4 
     alert("ALT+F4"); // Do whatever you want here
  }
} 

相反，您也可以尝试以下脚本:

Instead you can also try below script:

<script>
var userIsEditingSomething; // set this if something crazy happens         
oldOnBeforeUnload = window.onbeforeunload;
window.onbeforeunload = function ()
{         // attempt to handle a previous onbeforeunload        
    if ('function' === typeof oldOnBeforeUnload)
    {
        var message = oldOnBeforeUnload();
        if ('undefined' !== typeof message)
        {
           if (confirm('string' === typeof message ? message : 'Are you sure you want to leave this page?'))
           {
               return; // allow user to exit 
           }
        }
    }
    if (userIsEditingSomething)
    {
                 return 'Are you sure you want to exit?';
    }
};  </script>

I got this script from : 

[ ^ ]

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