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Dynamic ListBoxes

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ListBox

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Tomas asked on 12 Nov 2013, 08:15 AM

Hi everybody,

I need to solve the following problem: I have a dynamic set of properties (ObservableCollections of strings or integers) and for each of them I need to create a listbox. I have succeeded creating listboxes, however I cannot select items, I cannot scroll the content etc.

The code generating the list box follows:

private UIElement GetRadListBox(int number, string block)

{

var lb = new Telerik.Windows.Controls.ListBox();

lb.Name = string.Format(DYNAMIC_SELECTOR_NAME_FORMAT, block, number.ToString("00"));

lb.HorizontalAlignment = System.Windows.HorizontalAlignment.Left;

lb.SelectionMode = Telerik.Windows.Controls.SelectionMode.Multiple;

lb.Width = 240;

lb.MaxHeight = 300;

// bind item source

var binder = new Binding(string.Format(DYNAMIC_LIST_PROPERTY_FORMAT, block, number.ToString("00")));

binder.Mode = BindingMode.TwoWay;

lb.SetBinding(Telerik.Windows.Controls.ListBox.ItemsSourceProperty, binder);

lb.ItemsPanel = (ItemsPanelTemplate)Resources["VirtualizingStackPanelTemplate"];

return lb;

}

The returned element is added as a child to a StackPanel.

I would appreciate any help.

3 Answers, 1 is accepted

answered on 14 Nov 2013, 11:07 AM

Hi Tomas,

Try replacing the ListBox with RadListBox and everything should start working as expected:

...

// var lb = new Telerik.Windows.Controls.ListBox();

var lb = new Telerik.Windows.Controls.RadListBox();

...

The first ListBox is obsolete and shouldn't be used any more, the correct one is RadListBox.

Hope this helps.

Regards,
Kalin
Telerik

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answered on 15 Nov 2013, 04:02 PM

Hi Tomas,

The RadListBox should be present in the Telerik.Windows.Controls assembly as you can see in the Controls Dependencies article from our online help documentation. If you don't have it you are probably using old version and we recommend that you upgrade to the newest Q3 2013 version of the controls.

Regards,
Kalin
Telerik