获取一个隐藏字段从IFRAME放进容器页面 [英] Getting a hidden field from an Iframe into container page

问题描述

我有一个包含一个IFRAME的ASP页。我会打电话给它的主页。我需要一次的iframe加载完成后在主要页面设置的隐藏字段的值。 iframe的是，也可以是其在Page_Load期间设置的隐藏字段的ASP页。然后，它需要这个值传递到一个隐藏领域的主要页面上。

我在调用主框架JavaScript方法的iframe页面在onload弯。我不得不把延迟在，因为它不能以其他方式找到他们就解决了一些Telerik控制功能。看来这个页面还没有完成初始化。

问题：
有没有更好的方式来做到这一点？
是否有一个页面就绪事件？
有没有得到这些页面同步的，所以我不需要时间延迟的方法？

Thansks，
布赖恩

在的iframe页面我

 的window.onload = doLoad;  功能doLoad（）{
      window.parent.SetHitCount（的document.getElementById（＆LT;％= hdnHitCount.ClientID％GT;值））;
      返回;
  }
 

在主网页，我有这个JavaScript函数：

  //从文件的iframe称为设置命中计数
  功能SetHitCount（计数）{
        变种hdnHitCount =的document.getElementById（＆下;％= hdnHitCount.ClientID％gt;中）
        hdnHitCount.value =计数;
        //工具栏中的设置。需要一个延迟，所以这个Telerik控制将准备
        window.setTimeout（函数（）{
            变种工具栏= $查找（＆下;％= RadToolBarDocument.ClientID％gt;中）;
            如果（工具栏！= NULL）{
                VAR键= toolbar.findItemByValue（NumberOfHits）;
                button.set_text（＆下;％= Resources.Review_Document.Hits％gt;中+ hdnHitCount.value）;
            }
       }，1000）;
  }
 

解决方案

这似乎自从被获得的 hdnHitCount 值喜欢你的问题无关的IFRAME，用没有问题。

相反，你有一个时机的问题 - 当值的控制并不总是可用

。

硬codeD超时并不是一个很好的解决方案。如果控制初始化比第二个需要更长的时间（例如在较慢的机器/连接）？

要做到这一点是建立一个体系，其中两个控制初始化和 SetHitCount 功能都将检查其他已经发生了正确的方法：

• 如果在 SetHintCount 运行时，可调节，运行你的逻辑，否则，保存命中次数一些变量


• 如果当控件初始化设置了该变量，从填充它的值控制。否则， SetHitCount 尚未执行，当它将填充控制。

I have an ASP page that contains an iframe. I'll call it the main page. I need to set a hidden field's value in the main page once the iframe has finished loading. The iframe is an ASP page that has a hidden field that is set during its page_load. It then needs to pass this value into a hidden field on the main page.

I have an onLoad hander in the iframe page calling a javascript method in the main frame. I had to put a delay in the function where it addresses some telerik controls because it couldn't find them otherwise. Seems that the page hasn't finished initializing.

Questions: Is there a better way to do this? Is there a "page is ready" event? Is there a way to get these pages synched up so I don't need time delays?

Thansks, Brian

In the iframe page I do

  window.onload = doLoad;

  function doLoad() {
      window.parent.SetHitCount(document.getElementById("<%=hdnHitCount.ClientID %>").value);
      return;
  }

In the main page, I have this javascript function:

  // called from document iframe to set the hit count
  function SetHitCount(count){
        var hdnHitCount = document.getElementById("<%=hdnHitCount.ClientID %>")
        hdnHitCount.value = count;
        // set in the toolbar. needs a delay so the telerik controls will be ready
        window.setTimeout(function() { 
            var toolbar = $find("<%=RadToolBarDocument.ClientID%>");
            if (toolbar != null) {
                var button = toolbar.findItemByValue("NumberOfHits");
                button.set_text("<%= Resources.Review_Document.Hits %>" + hdnHitCount.value);
            }
       }, 1000); 
  }

解决方案

It seems like your problem has nothing to do with the IFrame, since the hdnHitCount value is being obtained with no problem.

Rather, you have a timing issue - the control is not always available when the value is.

The hardcoded timeout is not a good solution. What if the control initialization takes longer than a second (for example on slower machines/connections)?

The right way to do it is to set up a system where both the control initialization and the SetHitCount function will both check if the other has already happened:

• If when SetHintCount is run, the control is available, run your logic, otherwise, save the hit count to some variable
• If when the control is initialized this variable is set, populate the control from its value. Otherwise, SetHitCount has not executed yet and will populate the control when it does.

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