RadPanelBar items count not rendering

[Satyajeet]

Hi,

1. I am trying to get the count of the Radpanelbar items. But i am getting Null reference exception sometimes as attached in the screenshot 1.
2. The same issue occurs when i am trying to fetch HtmlListItems. Please see attached scrrenshot 2.

The same code gives the exact Count/fetches HtmlListItems at times  and some times  gives a null reference exception. I am unable to understand this wierd behaviour.
Could you please help.

Thanks,
Satya

[Anthony]

Hello Satya,

The issue comes when you use a number in the FOR statement that is larger than number of list items.

To avoid this, you can get the count of list items first, then ensure the index number does not go higher than that. Take the following HTML as an example:

<div id="lister">
  <ul>
    <li>One
    <br/>
    <a href="http://bing.com">Bing</a>
    </li>
    <li>Two</li>
    <li>Three</li>
  </ul>
</div>

and use the following code:

HtmlDiv d = Find.ById<HtmlDiv>("lister");
HtmlUnorderedList list = d.Find.ByTagIndex<HtmlUnorderedList>("ul", 0);

int count = list.ChildNodes.Count;
Log.WriteLine(count.ToString());

for (int i = 0; i < count; i++)
{
    HtmlListItem li = d.Find.ByTagIndex<HtmlListItem>("li", i);
    Log.WriteLine(li.TextContent);
}

Greetings,

Anthony
the Telerik team

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