Automatically expand all nodes in RadTreeListView v2010.2.714 by default

[Rami Abughazaleh]

RadControls for Silverlight 4 v2010.2.714

In the previous version (RadControls for Silverlight 4 v2010.1.603) I was able to use the following syntax to automatically expand all nodes by default:

<telerikNavigation:RadTreeListView>

        <telerikNavigation:RadTreeListView.ItemContainerStyle>

            <Style TargetType="telerikNavigation:RadTreeListViewItem">

                <Setter Property="IsExpanded" Value="True" />

            </Style>

        </telerikNavigation:RadTreeListView.ItemContainerStyle>

    </telerikNavigation:RadTreeListView>

As indicated here:
http://www.telerik.com/community/forums/silverlight/treelist/when-to-call-expandall.aspx

However, I have tried similar syntax but it is not working as expected.
<telerik:RadTreeListView.ItemContainerStyle>
  <Style TargetType="telerik:GridViewRow">
    <Setter Property="IsExpanded" Value="True" />
  </Style>
</telerik:RadTreeListView.ItemContainerStyle>

Is this feature not available with the latest release (RadControls for Silverlight 4 v2010.2.714)?

Thank you.

[Mike]

I was able to resolve this issue by calling the ExpandAllHierarchyItems() method on the RadTreeListView.

[Stephen]

I would like to be able to do this in xaml, without having the code-behind. Is it possible with the current version?

 Cheers,
 Steve

[Andy Fry]

I am also interested in how you bind the IsExpanded property to a property on the objects that I have the TreeListView bound to.

[Rami Abughazaleh]

I'm thinking you can use the ContainerBindingCollection.

http://www.telerik.com/support/kb/silverlight/treeview/radtreeview-and-hierarchicaldatatemplate.aspx

http://www.telerik.com/community/forums/silverlight/tabcontrol/setting-isselected-via-databinding-at-runtime.aspx

[Stefan Dobrev]

Hello all,

Container bindings are not yet supported in the new version of RadTreeListView. What you can do currently is to use RowLoaded and RowUnloaded events. In the loaded event you will bind specific row properties to the respective properties of your data items. In the unloaded event you can unbind them - using ClearValue(...) method.

Best wishes,
Stefan Dobrev
the Telerik team

[David Schnebly]

Is there an estimated time when container bindings will be working for the RadTreeListView?

[Stefan Dobrev]

Hello David,

We did not have an estimate when the container bindings will be implemented for RadTreeListView. Can you share more details about your scenario? Why is the RowLoaded event not sufficient for your case?

Greetings,
Stefan Dobrev
the Telerik team

[Tim Tos]

Hello Stefan,

I also need this functionality although I don't want to expand all nodes by default.
I want to expand a node according to the ViewModel! I used the XAML-Code below and it was working very well!
Now - with Q2 - I don't know how to solve this elegant and at least for my scenario it is very ugly to use the event you spoke about!
My XAML-Code:

<my:RadTreeListView.ItemContainerStyle>
    <Style TargetType="local:TableItemViewModel">
     <Setter Property="util:SetterValueBindingHelper.PropertyBinding">
      <Setter.Value>
       <util:SetterValueBindingHelper
                                Property="IsExpanded"
                                Binding="{Binding IsExpanded}"/>
      </Setter.Value>
     </Setter>
    </Style>
</my:RadTreeListView.ItemContainerStyle>

Any ideas?
Thanks,
Tim.

[Stefan Dobrev]

Hello Tim,

You should use RowStyle property for your scenario.

Kind regards,
Stefan Dobrev
the Telerik team

[Tim Tos]

Hello Stefan,

thanks a lot for your time and help! RowStyle was just what I needed!
Tim.

[Dimitri Rakviashvili]

Tim, could you  provide full example of your code ? 
Or could you explain how can i obtain this :

util:SetterValueBindingHelper class ?

Thanks

[Tim Tos]

Hello Dimitri,

sorry for the late response!
I found the solution here!
Hope this helps!

Best Wishes,
Tim.

[JJ Loubser]

 radTreeListView_New.ExpandAllGroups();
 radTreeListView_New.ExpandAllHierarchyItems();
not working in my case:

try it to solve this problem:
http://www.telerik.com/community/forums/silverlight/treelist/radtreelistview-containerbinding-not-binding.aspx



used RowLoaded and RowUnLoaded,

Error HRESULT E_FAIL has been returned from a call to a COM component

at line:

Row_.IsExpanded = oldRow_.IsExpanded;

in:

private RadTreeListView radTreeListView_;
        private bool mTreeViewListLeftScreen = false;
        private bool mTreeViewSetAllExapnd = false;
        public void radTreeViewlist_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
        {
            if (!mTreeViewListLeftScreen)
            {
                radTreeListView_ = (RadTreeListView)sender;
                if (radTreeListView_ != null && radTreeListView_.ItemsSource != null && radTreeListView_.Items.Count > 0)
                {
                    
                    foreach (TreeViewListItem item in radTreeListView_.Items)
                    {
                        
                        if (radTreeListView_.ItemContainerGenerator.ContainerFromItem(item) != null && radTreeListView_.ItemContainerGenerator.ContainerFromItem(item) is TreeListViewRow)
                        {

                            TreeListViewRow Row_ = (TreeListViewRow)radTreeListView_.ItemContainerGenerator.ContainerFromItem(item);
                            item.IsItemCollectionExpanded = Row_.IsExpanded;
                            Row_.SetBinding(TreeListViewRow.IsExpandedProperty, new Binding()
                                                                                {
                                                                                    Source = item,
                                                                                    Path = new PropertyPath("IsItemCollectionExpanded")
                                                                                }
                                           );


                        }
                    }
                }
            }
            else
            {
                RadTreeListView radTreeListView_New = (RadTreeListView)sender;
                if (radTreeListView_New != null && radTreeListView_New.ItemsSource != null && radTreeListView_New.Items.Count > 0)
                {
                                      

                    foreach (TreeViewListItem item in radTreeListView_New.Items)
                    {
                       
                        if (radTreeListView_New.ItemContainerGenerator.ContainerFromItem(item) != null && radTreeListView_New.ItemContainerGenerator.ContainerFromItem(item) is TreeListViewRow)
                        {
                            foreach (TreeViewListItem olditem in radTreeListView_.Items)
                            {
                                if (olditem.Id == item.Id)
                                {
                                    if (radTreeListView_.ItemContainerGenerator.ContainerFromItem(olditem) != null && radTreeListView_.ItemContainerGenerator.ContainerFromItem(olditem) is TreeListViewRow)
                                    {
                                        TreeListViewRow Row_ = (TreeListViewRow)radTreeListView_New.ItemContainerGenerator.ContainerFromItem(item);
                                        TreeListViewRow oldRow_ = (TreeListViewRow)radTreeListView_.ItemContainerGenerator.ContainerFromItem(olditem);

                                        if (oldRow_.IsExpanded)
                                        {}
                                        Row_.IsExpanded = oldRow_.IsExpanded;
                                        
                                        Row_.SetBinding(TreeListViewRow.IsExpandedProperty, new Binding()
                                        {
                                            Source = item,
                                            Path = new PropertyPath("IsItemCollectionExpanded")
                                        }
                                           );

                                    }
                                }
                            }
                        }
                    }
                }
            }
        }

[JJ Loubser]

working when I update this code:

try
                                        {
                                            Row_.IsExpanded = oldRow_.IsExpanded;
                                            Row_.SetBinding(TreeListViewRow.IsExpandedProperty, new Binding()
                                                                                                {
                                                                                                  Source = item,
                                                                                                  Path = new PropertyPath("IsItemCollectionExpanded")
                                                                                                }
                                                           );
                                           
                                        }
                                        catch (Exception eeee)
                                        { }

in:

 private RadTreeListView radTreeListView_;
        private bool mTreeViewListLeftScreen = false;
        private bool mTreeViewSetAllExapnd = false;
        public void radTreeViewlist_RowLoaded(object sender, Telerik.Windows.Controls.GridView.RowLoadedEventArgs e)
        {
            if (!mTreeViewListLeftScreen)
            {
                radTreeListView_ = (RadTreeListView)sender;
                if (radTreeListView_ != null && radTreeListView_.ItemsSource != null && radTreeListView_.Items.Count > 0)
                {
                    
                    foreach (TreeViewListItem item in radTreeListView_.Items)
                    {
                        
                        if (radTreeListView_.ItemContainerGenerator.ContainerFromItem(item) != null && radTreeListView_.ItemContainerGenerator.ContainerFromItem(item) is TreeListViewRow)
                        {

                            TreeListViewRow Row_ = (TreeListViewRow)radTreeListView_.ItemContainerGenerator.ContainerFromItem(item);
                            item.IsItemCollectionExpanded = Row_.IsExpanded;
                            Row_.SetBinding(TreeListViewRow.IsExpandedProperty, new Binding()
                                                                                {
                                                                                    Source = item,
                                                                                    Path = new PropertyPath("IsItemCollectionExpanded")
                                                                                }
                                           );


                        }
                    }
                }
            }
            else
            {
                RadTreeListView radTreeListView_New = (RadTreeListView)sender;
                if (radTreeListView_New != null && radTreeListView_New.ItemsSource != null && radTreeListView_New.Items.Count > 0)
                {
                                      

                    foreach (TreeViewListItem item in radTreeListView_New.Items)
                    {
                       
                        if (radTreeListView_New.ItemContainerGenerator.ContainerFromItem(item) != null && radTreeListView_New.ItemContainerGenerator.ContainerFromItem(item) is TreeListViewRow)
                        {
                            foreach (TreeViewListItem olditem in radTreeListView_.Items)
                            {
                                if (olditem.Id == item.Id)
                                {
                                    if (radTreeListView_.ItemContainerGenerator.ContainerFromItem(olditem) != null && radTreeListView_.ItemContainerGenerator.ContainerFromItem(olditem) is TreeListViewRow)
                                    {
                                        TreeListViewRow Row_ = (TreeListViewRow)radTreeListView_New.ItemContainerGenerator.ContainerFromItem(item);
                                        TreeListViewRow oldRow_ = (TreeListViewRow)radTreeListView_.ItemContainerGenerator.ContainerFromItem(olditem);

                                        if (oldRow_.IsExpanded)
                                        {}
                                        try
                                        {
                                            Row_.IsExpanded = oldRow_.IsExpanded;
                                            Row_.SetBinding(TreeListViewRow.IsExpandedProperty, new Binding()
                                                                                                {
                                                                                                  Source = item,
                                                                                                  Path = new PropertyPath("IsItemCollectionExpanded")
                                                                                                }
                                                           );
                                           
                                        }
                                        catch (Exception eeee)
                                        { }

                                       

                                    }
                                }
                            }
                        }
                    }
                }
            }
        }

        public void radTreeViewlist_RowUnloaded(object sender, Telerik.Windows.Controls.GridView.RowUnloadedEventArgs e)
        {
           
        }


just need to upgrade this code for 3 time + loads... Remember this is in ViewModel code not code behind...