通过以编程方式更改文本框值来调用Javascript onchange事件 [英] Call Javascript onchange event by programmatically changing textbox value
问题描述
我面临的问题是：
- 我在日历控件旁边有一个日期范围的文本框。
- 当用户从日历中选择日期时，它会将该日期填入文本框中
- 当发生这种情况时，我想触发一个javascript函数，然而，'onchange'事件似乎没有发生。
我希望能够将事件添加为文本框的属性，如：
I'd ideally like to be able to add the event as an attribute to the textbox, something like:
txtCreateDate.Attributes.Add("onchange", string.Format("JSfunction({0},'{1}');", arg1, arg2));
更多信息：
日期输入到c＃的文本框中。日历控件在页面上有一个事件处理程序。选择日期后，事件处理程序会将日期放入文本框中。我已经尝试将焦点设置到文本框，然后在文本框上放置一个onBlur属性，但文本框似乎永远不会得到焦点。
more info: The date is entered into the textbox in c#. The calendar control has an eventhandler on the page. When a date is selected, the eventhandler puts the date into the textbox. I have tried setting the focus to the textbox at this point, then putting an onBlur attribute on the textbox, but the textbox never seems to get focus.
我想我可以此时直接调用javascript函数做ClientScript.RegisterClientScriptBlock或类似的东西，但这似乎很草率，从来没有像我想要的那样工作。
I suppose I could directly call the javascript function at this point doing ClientScript.RegisterClientScriptBlock or something like that, but that seems sloppy and never works like I want it to.
推荐答案
你错误解释了onchange事件在应用于textarea时的作用。直到它失去焦点或你进入后它才会开火。为什么不从填充文本区域的选择的onchange上激活函数？
You're misinterpreting what the onchange event does when applied to a textarea. It won't fire until it loses focus or you hit enter. Why not fire the function from an onchange on the select that fills in the text area?
在这里查看有关onchange事件的更多信息： w3schools
Check out here for more on the onchange event: w3schools
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