Clientside selecting of items | Infragistics Forums

799

Clientside selecting of items

Razieltje posted over 13 years ago

Hi,

I have a webdropdownlist of lets say 5 items

First item is ALWAYS empty (Key = -1, text = "")

the other items, are not (of course)

my dropdown is defined by

Displaymode="DropDownList"
EnableMultipleSelection="true"
EnableClosingDropDownOnSelect="false"

What I'm trying to achieve, in JS, is

If the first item (Key = -1) is selected, then all other items need to be unselected
If any other item is selected, the first needs to get unselected.
It must remain possible to select multiple items (other then -1)

Sorry for the weird question perhaps.

799

Razieltje posted over 13 years ago in reply to Konstantin Dinev

Thanks, seems to do what it needs to do in my case :)
Cancel
Reply

Cancel
5105

Verified Answer
Offline Konstantin Dinev posted over 13 years ago in reply to Razieltje

Yeah that doesn't quite work. Here is what I have that worked for me:

function CheckAllCheckboxes(sender, eventArgs)
{
if (eventArgs.getNewSelection()[eventArgs.getNewSelection().length - 1]._address && eventArgs.getNewSelection()[eventArgs.getNewSelection().length - 1]._address == 0)
{
  for (var i = 1; i < sender.get_items().getLength(); i++)
  {
   sender.get_items().getItem(i).unselect();
   sender.get_items().getItem(i)._element.childNodes[0].checked = false;
  }
}
else {
  sender.get_items().getItem(0).unselect();
  sender.get_items().getItem(0)._element.childNodes[0].checked = false;
}
}

Try it and let me know if you need anything else!

Thank you for using the Infragistics forums!
Cancel
Reply

Reject Answer

Cancel
799

Razieltje posted over 13 years ago in reply to Konstantin Dinev

First of all , thanks for the reply.

My code, being based on that post. Seems to always return the first item (being the empty item - autoselected- and the new selected item, resulting in nothing changing.(because he loops through it first..?

What seems to be wrong? (this is called in the selectionChanging..

function CheckAllCheckboxes(sender, eventArgs) {
    if (eventArgs.getNewSelection().length == 0) {
        sender.get_items().getItem(0).set_selected(true);
        sender.get_items().getItem(0).select();
        sender.get_items().getItem(0)._element.childNodes[0].checked = true;
        for (var i = 1; i < sender.get_items().getLength(); i++) {
            sender.get_items().getItem(i).set_selected(false);
            sender.get_items().getItem(i).unselect();
            sender.get_items().getItem(i)._element.childNodes[0].checked = false;
        }
    }
    else {
        if (eventArgs.getNewSelection()[0]._address && eventArgs.getNewSelection()[0]._address == 0) {
            for (var i = 1; i < sender.get_items().getLength(); i++) {
                sender.get_items().getItem(i).set_selected(false);
                sender.get_items().getItem(i).unselect();
                sender.get_items().getItem(i)._element.childNodes[0].checked = false;
            }
        }
        else {
            sender.get_items().getItem(0).set_selected(false);
            sender.get_items().getItem(0).unselect();
            sender.get_items().getItem(0)._element.childNodes[0].checked = false;
        }
    }
    return true;
}
Cancel
Reply

Cancel
5105

Offline Konstantin Dinev posted over 13 years ago

Hi there Razieltje,

Take a look at the following forum thread: http://forums.infragistics.com/forums/t/55898.aspx

It deals with pretty much the same thing, except in this case it is checkboxes and you want to work with the selection. All you have to change in that example is to hook to selection changing and if the newly selected item is the first one to loop through all the rest and unselect them, otherwise to get the first item and unselect it. This is done through set_selected(boolean).

I hope this would do the job!
Cancel
Reply

Cancel