CheckedItems Binding

[Robert]

Hi,
since the CheckedItems collection is no DependencyProperty of the DataBoundListBox, I can not use something like

<RadDataBoundListBox ItemsSource="{Binding List}" CheckedItems="{Binding FilteredList, Mode=TwoWay}" ...

in XAML code. Is there an easy way to achieve this behaviour?

Thank you in advance
Robert

[Deyan]

Hi Robert,

Currently we do not support bound mode for the CheckedItems collection in RadDataBoundListBox/RadJumpList. Since we have had a couple of requests to implement this feature, we will consider it for our next major release but currently our plans for Q1 2012 are already tight in schedule and we will not be able to include this feature in the upcoming package.

Greetings,
Deyan
the Telerik team

[Ilija]

Hi Robert,

a simple workaround for this problem is, to implement the ItemCheckedStateChange Event in your xaml code behind file and to fill a ObservableCollection<T> and set object for the type parameter. Then when you check or uncheck your add/remove the currently checked item to this collection. You then simply bind to this collection:

private void lstBrowser_ItemCheckedStateChanged(object sender, Telerik.Windows.Controls.ItemCheckedStateChangedEventArgs e)
      {
          if (e.IsChecked)
          {
              App.ViewModelForApp.CheckedItems.Add(e.Item);
          }
          else
          {
              App.ViewModelForApp.CheckedItems.Remove(e.Item);
          }
      }

This is against the MVVM rules, but it is a workaround that can be used, until the Telerik implementation is working. Afterwards you can get your bound data like this (maybe there is a shorter way to get the values):

foreach (var item in this.CheckedItems)
            {
                itemsFileInformation.Enqueue(
                    ((Telerik.Windows.Data.IDataSourceItem)item).Value as SkyDriveFileInformation);
            }

[Andrew]

has there been any updates to the controls since this thread ended? If not, I'll give this workaround a shot. thanks all

[Deyan]

Hi Andrew,

You can use the workaround mentioned in this thread.

Let us know should you have additional questions.

Regards,
Deyan
Telerik

[Matheus]

Did you guys managed to add the Dependency Property to the RadDataBoundListBox or should I use the workaround? Thanks a lot. It would be great to simply add the binding to keep my MVVM clean.

[Deyan]

Hello Matheus,

This feature is still not implemented. We will escalate its priority in our TODO list though and will try to implement it for our next major release.

Regards,
Deyan
Telerik

[Derik]

Sucks that things like this would not be designed w/ MVVM in mind from the onset.  Really is a disappointment.  Oh well I guess I will use the work around....

[esskar]

Hello,

the workaround is fine but how do i uncheck the items from code?

Regards,
Sascha

[Deyan]

Hello Sascha,

To uncheck or check items in code you simply need to remove or add them from/to the CheckedItems collection. Or there is something specific to your scenario that prevents you from  doing that?

Regards,
Deyan
Telerik

[esskar]

thanks. works!