ASP.NET：退格键行为
我正在用 ASP.NET 和 VB.NET 编写一个内部 Intranet 应用程序。我的“客户”是初级到中级用户。我们所有的浏览器都是 IE8 及以上标准浏览器。
该应用程序运行良好，但有一件事除外。退格键。当用户在文本框中键入无效数字时，RegularExpressionValidator 和 ValidatorCalloutExtender 会触发并通知用户。完美的。除此之外，当用户关闭弹出警告并注意到光标仍在文本框中闪烁时，他/她觉得是时候按退格键并删除该讨厌的字段值了。
不幸的是，浏览器将此操作解释为“返回”页面历史记录的愿望。我的老板在尖叫。他的老板们在尖叫。我头疼。
那么，我怎样才能关闭这种行为呢？我仍然需要退格键来消除文本框中的字符，但仅此而已。公司政策在这里：退格键是从屏幕上删除字符。不多不少。
有什么想法吗？
谢谢，
杰森
I'm writing an in-house intranet application in ASP.NET and VB.NET. My 'customers' are beginner to medium-level users. All of our browsers are IE8 and above, standard.
The application works great, except for one thing. The backspace key. When a user types an invalid number into a textbox, a RegularExpressionValidator and ValidatorCalloutExtender fire off and notify the user. Perfect. Except that, when the user closes the popup warning and notices the cursor is still flashing in the textbox, he/she feels it's time to hit the backspace key and delete that pesky field value.
Unfortunately, the browser interprets this action as a desire to go 'back' into the page history. My boss is screaming. His bosses are screaming. I have a headache.
So, how can I turn off this behavior? I still need the backspace to eliminate characters in the textbox, but nothing else. Company policy here: Backspace is to delete characters from the screen. Nothing more, nothing less.
Any ideas?
Thanks,
Jason
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（5）
您可以尝试禁用缓存，但这可能会影响性能。我认为有一个 javascript 函数可以修复它：
将其与自定义函数配对，如下所示
<脚本类型=javascript>
<代码>
函数disableBack()
{
window.history.forward();
}
setTimeout("disableBack()", 0);
然后在你的
中调用它，我认为这应该可行，我用过它然而很久以前。让我知道它是否有效！
You could try to disable caching, but that might have performance consequences. I think there is a javascript function that will fix it however:
Pair this with in a custom function like so
<script type=javascript>
function disableBack()
{
window.history.forward();
}
setTimeout("disableBack()", 0);
</script>Then call it in your
<body onLoad="disableBack()">I think this should work, I used it a long time ago however. Let me know if it works!
也许在这种情况下不使用弹出窗口是一个好方法。
问题是，没有可接受的控件具有焦点，并且在不强制焦点成为所述控件的情况下，浏览器将捕获它。
Perhaps not using a popup in this situation would be a good approach.
The problem is that no acceptable control has focus and without forcing the focus to be said control, the browser will catch it instead.
当用户关闭弹出窗口时，您可以使用
onClick事件将表单的焦点设置回 TextBox 吗？我认为这将允许用户恢复编辑文本框值。When a user closes the popup, can you use that
onClickevent to set the form's focus back to the TextBox? I would think this would allow the user to resume editing the TextBox value.我看到两种可能的解决方案：
I see 2 possible solutions :
如果光标在文本框中闪烁，则退格键也应由输入框处理，并且不应传播到文档对象或窗口对象。如果是这样，您需要调试或使用这个 在文档级别停止传播的技术
If the cursor is flashing in a text box, then the backspace should be handled by the input box as well and not supposed to get propagated to a document object or window object. If it does, you need to debug or use this technique to stop propagation on document level