异步回发不会导致document.ready执行

Question

我必须对几页中使用的用户控件实施一些更改.用户控件包含一些JQuery来处理分页任务(显示3个月的数据并一次隐藏9个).加载控件后,它将自动显示当前季度并在$(document).ready()中执行此代码.

我遇到的问题是,在其中一个页面中使用了用户控件,该控件在页面加载时不可见.异步回发用于更改可见性,但这不执行ready().

我找到了一个片段,允许托管页面拦截部分回发的EndResponse,但我仍然无法在usercontrol中执行该功能.

有没有人有什么建议？

干杯

戴夫

Answer 1

就像我一样,你会讨厌微软规定的答案."规定"的答案是使用PageRequestManager来设置请求处理程序.在每个部分回发完成之后(然后)执行该请求处理程序.

请求处理程序示例:

<script id="events" type="text/javascript">

    jQuery(document).ready(function() {

        // Your normal code goes here
        setupSomething();
        initializeSomethingElse();

        // Setup your partial-postback event handler.
        // This is used to rewire all events since all are 'lost' after partial-postback.
        Sys.WebForms.PageRequestManager.getInstance().add_endRequest(requestHandler);
    });

    ///<summary>partial postback event handler. Executed after the partial postback is completed. Clears modal popup textboxes</summary>
    ///<param name="sender"></param>
    ///<param name="args">http://www.asp.net/ajax/documentation/live/ClientReference/Sys.WebForms/EndRequestEventArgsClass/default.aspx</param>
    function requestHandler(sender, args) {

        if (args.get_error() == undefined) {

            // Your normal code goes here
            setupSomething();
            initializeSomethingElse();
        }
        else
            alert(args.get_error()); // Do something
    }
</script>

这让我们回答简单的答案:
为什么不从代码隐藏中明确初始化用户控件,并在用户控件HTML(本身)中保持初始化JavaScript.

void YourUserControl_PreRender(object sender, EventArgs e)
{
    try
    {

    }
    catch (Exception ex)
    {

    }
    finally 
    {
        // Do this
        ScriptManager.RegisterStartupScript(this.Page, this.Page.GetType(), "registerInitializer", buildInitializer(), true);
    }
}

渲染完成后,"buildInitializer"逻辑说:"如果客户端上存在此函数,请调用它." 并且......每次都有效.

private string buildInitializer()
{
    StringBuilder javascript = new StringBuilder();

    javascript.Append("if (window.initializeMyControl) {");
    javascript.Append("if(typeof window.initializeMyControl == 'function') { initializeMyControl(); }");
    javascript.Append("}");

    return javascript.ToString();
}

现在,您的用户控件初始化可以存在于用户控件所在的位置:

<script type="text/javascript">
    function initializeMyControl() {

        // Your normal code goes here
        setupSomething();
        initializeSomethingElse();
    }
</script>