listBox.get_items().add(item) and Count=0

[Jonathan Torres]

I am transferring the contents of one radlistbox to another using javascript:

item.set_text(doc10.get_text());
item.set_value(doc10.get_text());
listBox.get_items().add(item);

After I have added all the items, the following statement will return the # of items in the listbox: listBox.get_items()._array.length

After this, I submit my page and I'm trying to access the contents of the listbox in the codebehind, but RadListbox.Items.Count returns 0.

Can anyone explain why this is happening?  I am using Q2 2009 RadListbox.

Thanks,
Jon

[Yana]

Hi Jon,

You should use trackChanges() and commitChanges() methods of the listbox in order to preserve the changes to the server. You can check this help article about this.

Best regards,
Yana
the Telerik team

[Jonathan Torres]

Thank you, that worked.

[Hanso Gnana]

Hello,

In this thread, Jon said "After I have added all the items, the following statement will return the # of items in the listbox: listBox.get_items()._array.length".

It worked for me too. But could someone please comment on where in the documentation its mentioned that this is the way to access the count of a collection. I spent some time looking for it and did not find it anywhere - only when I came across this thread (kudos to this forum).

Thanks!

[Yana]

Hello Hanso,

Actually _array is a private property, that's why it's not mentioned in the documentation, the correct way is to use get_count() method of the items collection as shown here.

Best regards,
Yana
the Telerik team

[Hanso Gnana]

Many thanks.