检测F5是pressed和刷新 [英] Detect F5 being pressed and Refresh

问题描述

我有一个WebForm，我想检测是否F5按钮被pressed或者如果页面刷新。我知道回发，但它不是我要找的。我有一个按钮被点击和参数的值设置为GridView时加载的模式弹出一个gridview。刷新时被击中，如果模式弹出按钮是previously点击的模式弹出是刷新后的可见光右。我想检测是否刷新页面，以prevent这一点。有任何想法吗？我想尝试覆盖，但我不完全知道如何使用它。我试过Control.ModifierKeys，但我没有访问ModifierKeys。

I have a webform and i want to detect if F5 button was pressed or if the page was refreshed. I know about postback but it is not what i'm looking for. I have a gridview that loads in a modal popup when a button is clicked and a parameter's value is set for the gridview. When refresh is hit and if the modal popup button was previously clicked the modal popup is visible right after refresh. I want to detect if the page is refreshed to prevent this. any ideas? I thought to try Override but I'm not exactly sure how to use it. I tried Control.ModifierKeys but I don't have access to ModifierKeys.

推荐答案

pressing F5或物理点击浏览器刷新行为会类似于导航离开页面。这是在事件window.onunload捕获。尝试下面的片段例如：

Pressing F5 or physically clicking the browser refresh behaves similarly to navigating away from the page. This is captured in the event window.onunload. Try the snippet example below:

window.onbeforeunload = function (evt) {
  var message = 'Are you sure you want to leave?';
  if (typeof evt == 'undefined') {
    evt = window.event;
  }
  if (evt) {
    evt.returnValue = message;
  }
  return message;
}

这将捕获的刷新，让你做某件事，或者提示用户。

This will capture the refresh and allow you to do something or prompt the user.

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