I am attempting to get a list of items in the drop down via javascript. It appears to return a length of 0 in the collection. The dropdown has about 40 items.....
What gives?
Excellent....thanks.
Hi,
you can do item.select() to select it and have visual styles applied, and item.unselect() to remove styling and remove selected state . set_selected(true/false) only sets the internal CSOM state, that's useful if you want to select and postback, without having immediate styles applied visually.
There are actually a couple of shortcuts for client-side selection (dropdown is the control object, or "sender", as it is usually passed in client-side event handlers):
dropDown.selectItem(item);
dropDown.selectItemByIndex(itemIndex);
Hope it helps. Thanks,
Angel
Ok, All i what to do at this point is select the item in the list, client side. It runs but nothing happens??
var items = _wddRoles.get_items();
var length = items.getLength();
var item;
for (var i = 0; i < length; i++) {
item = items.getItem(i);
if (item.get_value() == txtPreviousRole.value) {
item.set_selected(
true);
items.add(item);
break;
}
hi,
what you have in your application is "get_length()", while i wrote "getLength()". These are two different functions. The first one returns the actual number of CSOM javascript objects for the items - while the second one returns the size of the dom elements in the list - this is what you are looking for. When the control has AutoFiltering=Server and Off, there is automatic "Lazy Loading", which means javascript objects for the items are not created all at once, but on demand.
Thanks,
I know this. What i am saying is it is returning 0. <%@ Register assembly="Infragistics4.Web.v10.2, Version=10.2.20102.2091, Culture=neutral, PublicKeyToken=7dd5c3163f2cd0cb" namespace="Infragistics.Web.UI.ListControls" tagprefix="ig"%>
.
..
function
wddRoles_Initialize(sender, eventArgs){
alert(_wddRoles.get_items().get_length())
It is loaded by DataSource = DataTable.
Is there something that i am missing??