你如何获得客户端脚本上的ASP.NET回发执行？ （来自一个UpdatePanel） [英] How do you get client-side script to execute on an ASP.NET postback? (from an UpdatePanel)

问题描述

基本上我想获得一些JavaScript被发送回客户端，并从UpdatePanel内回发执行。此外，这是一个可重用的WebControl里面。

Basically I want to get some javascript to be sent back to the client and executed from a postback inside an UpdatePanel. Furthermore this is inside of a reusable WebControl.

我试过 this.Page.ClientScript.RegisterStartupScript 和 this.Page.ClientScript.RegisterClientScriptBlock ，但萤火表明这些脚本没有在回发的响应发送回去。

I've tried this.Page.ClientScript.RegisterStartupScript and this.Page.ClientScript.RegisterClientScriptBlock but Firebug shows that those scripts aren't sent back in the postback's response.

我也试过直上写了＆LT;脚本＆GT; 在控件的主要DIV中标记渲染
方法，它发送回，但不执行。

I also tried straight up writing a <script> tag inside the control's main div in the Render method, which does get sent back but isn't executed.

我有一个哈克解决方案的工作，但最好找一个清洁的解决方案。该黑客是一个1x1像素 IMG 与宽度/高度设置为0，并使用了一个的onload 事件添加到执行脚本和作品，但好像必须有这样做一个更清洁的方式。

I got a hacky solution working, but ideally looking for a cleaner solution. The hack is to add a 1x1 pixel img with width/height set to 0 and use that for an onload event to execute the script and that works, but it seems like there has to be a cleaner way to do this.

推荐答案

如果我理解正确，你去找endRequest事件 - 以避免图像的onload事件。有了这个code你在JavaScript端的面板更新的事件。

If I understand correct you look for the endRequest event - to avoid the onload of your image. With this code you get the event of your panel update on javascript side.

var prm = Sys.WebForms.PageRequestManager.getInstance();    
prm.add_initializeRequest(InitializeRequest);
prm.add_endRequest(EndRequest);

function InitializeRequest(sender, args) {      
}

function EndRequest(sender, args) {
}

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