以编程方式更改内容时检测文本框更改 [英] detecting textbox change when changing the content programmatically

问题描述

我有一个链接到jQuery事件处理程序的文本框，如下所示:

I have a textbox that's linked to a jquery event handler like this:

$('#SomeDiv').on({

   mouseenter: ....
   mouseleave: ....
   blur: ....
   keyup: function() { HandlerForKeyUp($(this)); } ,
   change: function() { HandlerForKeyUp($(this)); } 

}, '.MyTextBoxes');

基本上，HandlerForKeyUp是一个显示文本框中字母数量计数器的功能.用户输入时可以正常工作.

Basically, HandlerForKeyUp is a function that shows a counter of the number of letters in the textbox. It works fine when the user is typing.

但是，如果我这样写:

$('#SomeTextBox').val(SomeValue);

HandlerForKeyUp函数不会触发，甚至以为我在.on处理程序中映射了change事件，并且SomeTextBox是类MyTextBoxes，并且对所有其他事件做出反应.基本上，如果用户键入计数器就可以了，但是如果我在运行时设置了文本框的值，则计数器功能不会触发.

the HandlerForKeyUp function doesn't trigger, even thought I have the change event mapped out in the .on handler and SomeTextBox is of class MyTextBoxes and reacts to all other events. Basically, if the user types the counter works but if I set the value of the textbox at runtime the counter function doesn't trigger.

关于如何更改此设置的任何想法吗?

Any idea on how I could change this?

感谢您的建议.

推荐答案

您需要手动触发更改事件.

You need to fire the change event manually.

$('#SomeTextBox').val(SomeValue).change();

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