列表框的页面加载中未包含值 [英] Value is not coming in page load from list box

问题描述

大家好，

我正在尝试从页面加载时的列表框中获取值.然后使用XmlHttp Header从Java Script填充列表框中的值.
从Ajax，我可以从服务器端获取列表框中的值，但我也无法在页面加载时获取列表框的值.

这是xml Http标头的代码，其中值在响应中的列表框中更新:

Hi All,

I am trying to get the value from a list box on page load. And the values in list box are populating from Java Script using XmlHttp Header.
From Ajax I am able to get Values in list box from server side but I am nor getting the list box value on page load.

Here is the code for xml Http header where the values are updated in list box from response :

var customerList = document.getElementById("ListBox");
for (var count = customerList.options.length-1; count > -1; count--)
{
    customerList.options[count] = null;
}

var customerNodes = customerNode.getElementsByTagName(''customer_name'');
var textValue;
var optionItem;
for (var count = 0; count < customerNodes.length; count++)
{
    textValue = GetInnerText(customerNodes[count]);
    optionItem = new Option( textValue, textValue, false, false);
    customerList.options.add(optionItem);
}

请帮助我解决我的问题.感谢advacne！
问候，
Divya

Please help me in resolving my problem. Thanks in advacne !
Regards,
Divya

推荐答案

尝试类似的方法:

Try something like this:

var typeElem = responseElem[0].getElementsByTagName("Table");       
for (var i = 0; i <typeElem.length;i++)
 {
          var textNode = document.createTextNode(typeElem[i].firstChild.text);
         AppendToSelect(typeElem[i].lastChild.text, textNode);
 }

function AppendToSelect(value, content)
{   
    var opt;
    customerList = window.document.getElementById("ListBox");     
    opt = document.createElement("option");        
    opt.value = value;     
    opt.appendChild(content);    
    customerList.appendChild(opt);
}

您应该能够获得回发期间选择的值.

You should be able to get the values selected during postback.

您好，

感谢您的答复，但在页面加载时我仍然无法从列表框中获取值，并且给出了错误提示对象设置为空引用".

问候，
DIvya

Hi,

Thanks for your response but I am still not able to get the values from list box at page load and it gives error stating "Object set to null reference".

Regards,
DIvya

我得到了解决方案:

http://forums.devshed.com/net-development-87/problem-with-a-listbox-populated-from-javascript-184068.html

这对我有用！ :)

谢谢你的时间.

问候，
Divya

I got the solution :

http://forums.devshed.com/net-development-87/problem-with-a-listbox-populated-from-javascript-184068.html

This Worked for me ! :)

Thanks for your time.

Regards,
Divya

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