如何识别字段值在ASP.Net已经改变 - C＃？ [英] How to identify field value has changed in ASP.Net - C#?

问题描述

我在ASP.NET的页面，要求是很常见的，当窗体打开进行编辑，如果用户在页面上改变任何领域的价值，并点击取消，那么code不禁要问网友认为有一些改变的值是否要继续。在节约是将被丢弃。
此外，如果用户不进行更改形成将不会显示警报消息。我需要它的C＃，如果可能的话。

I have a page in asp .net , requirement is very common, when the form is open for editing if a user changes value of any of the field on the page and click on cancel , then the code must ask user that "There are some changed value do you want to continue.". On yes saving will be discarded . Also if user do not make changes form will not show the alert message. I need it c# , if possible.

推荐答案

这听起来象是在客户端应该发生 - 无需干预ASP.NET此处

This sounds like something that should happen on the client side - no need for ASP.NET intervention here.

我会做的是输入字段线向上变动的事件。当一个领域发生了变化，设置一个全局变量。

What i would do is wire up change events for the input fields. When a field has changed, set a global variable.

然后在取消按钮的的onclick 的事件，调用一个JavaScript函数，如果变量设置，显示消息框。

Then on Cancel button onclick event, call a JavaScript function, if the variable is set, show the message box.

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