在更新表后维护重点AJAX更新面板上 [英] Maintaining focus on ajax update panel after updating form

问题描述

我已经有一个用来更新它的DataSource每个text_changed事件或下拉列表中已被改变的时间一个FormView。在每个text_changed事件，相当于其他控件我称之为formView.UpdateItem方法，这将导致的形式，从我已经标签下到控制失去焦点。

I've have a formview that is designed to update it's datasource each time a text_changed event or dropdown list has been changed. On every text_changed event and equivalent for other controls I call the formView.UpdateItem method and this causes the form to lose focus from the control I have tabbed down to.

我试图实现这种方法但我得到未知的运行时错误后，我试图选择第二次控制。

I've tried to implement this method but I get unknown runtime errors after I have tried to select a control for the second time.

我不禁觉得有处理这个问题的另一种方式。

I can't help but think there is another way of dealing with this.

您会如何去解决这个问题？

How would you go about solving this issue?

推荐答案

有关这样的事情，我经常在ASP藏匿的值：使用JavaScript隐藏控制（INPUT TYPE =隐藏），然后添加一个pageLoad函数中（在JavaScript）来解析该字段，然后设置焦点。通过这种方式，集中控制的ID是通过回传仍然存在。

For things like this, I often stash the value in an asp:Hidden control (input type="hidden") using the javascript and then add a pageLoad function (in the javascript) to parse that field and then set the focus. This way the id of the focused control is persisted through the postback.

是这样的（伪code）：

Something like this (pseudocode):

<input type="hidden" id="focusHolder" />

function onSubmit (registered via ClientScript.RegisterOnSubmitStatemnet) {
grab the target and stash id in #focusHolder
}

function pageLoad() {
$get($get('focusHolder').value).focus();
}

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