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Select multiple items

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ListPicker

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Accepted

answered on 20 Jul 2012, 07:21 AM

Hi,

I do not have any custom styles or templates.

This is my XAML:

            <telerikInput:RadListPicker Header="user shelf" PopupHeader="user shelf" InlineModeThreshold="5"
                                         x:Name="lpUserShelf" SelectionMode="Multiple"
                                         SelectionChanged="lpUserShelf_SelectionChanged">
                 <telerikInput:RadListPicker.ItemTemplate>
                      <DataTemplate>
                         <StackPanel Orientation="Horizontal">
                             <TextBlock Text="{Binding Name}" />
                         </StackPanel>
                     </DataTemplate>
                 </telerikInput:RadListPicker.ItemTemplate>
                 <telerikInput:RadListPicker.PopupItemTemplate>
                     <DataTemplate>
                         <StackPanel Orientation="Horizontal">
                             <TextBlock Text="{Binding Name}" />
                         </StackPanel>
                     </DataTemplate>
                 </telerikInput:RadListPicker.PopupItemTemplate>
             </telerikInput:RadListPicker>

I see no text in the control when I return from the popup.

Karsten

answered on 20 Jul 2012, 08:47 AM

private void lpUserShelf_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    this.lpUserShelf.SummaryForSelectedItemsDelegate = SummaryForSelectedItemsDelegate;
}         

private object SummaryForSelectedItemsDelegate(IList list)
{
    var summary = String.Empty;
    for (var i = 0; i < list.Count; i++)
    {
        var isLast = i == list.Count - 1;
        var item = (UserShelf)list[i];
        summary = String.Concat(summary, item.Name);
        summary += isLast ? string.Empty : ", ";
    }             
    if (summary == String.Empty)
    {                 
        summary = "No selection";
    }             
    return summary;         
}

As explained in my previous post, then if I do not use the delegate, I get a text if only one item is selected,
class name if two (ore more are selected) and nothing if the delegate is used if at least one is selected.

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Select multiple items

22 Answers, 1 is accepted