expand parent level row to show second level row

[Christopher]

Thanks for the new TreeListView control. By default the TreeListView loads my collection of data only showing the parent level.  The children levels are collapsed on the grid.  I was wondering if its possible to expand to show the second level rows of my hierarchy data by default.  I don't see anywhere to do this in the API.  Please help.

Thanks

[Christopher]

Never mind. I did the following and I got the second hierarchy level to expand--

RadTreeListView1.ExpandHierarchyItem(

 

this.RadTreeListView1.Items[0]);

 

Is there a way to do this declaratively in xaml?

[Milan]

Hello Christopher,

Currently this is the preferred way of expanding items. We are considering to properties that will allow you to easily expand all items.

All the best,
Milan
the Telerik team

[Corey]

Any progress on this? Having to iterate the ItemsCollection, etc to save/restore the state of a tree view isn't ideally how this should be done in WPF.

Thanks,

Corey

[Milan]

Hi Corey,

I am afraid that there is not improvement on the matter. You might want to create a feature request using our Public Issue Tracking System so that other users can vote for this feature and boost its priority by doing so.

All the best,
Milan
the Telerik team

[Sharada]

 Please try out this. This will expand the upto level 1.

Add below Event 
 RadTreeListView1.ItemContainerGenerator.StatusChanged += new EventHandler(ItemContainerGenerator_StatusChanged);

 

 

void

 

 

ItemContainerGenerator_StatusChanged(object sender, EventArgs e) {
if (RadTreeListView1.ItemContainerGenerator.Status == System.Windows.Controls.Primitives.GeneratorStatus.ContainersGenerated)
{

 

 

 

 

if (RadTreeListView1.Items != null && RadTreeListView1.Items.Count > 0)

 

 

{

 

for (int i = 0; i < RadTreeListView1.Items.Count; i++)

 

 

{

 

 

TreeListViewRow objRow = (TreeListViewRow)RadTreeListView1.ItemContainerGenerator.ContainerFromIndex(i);

 if (objRow != null && !objRow.IsExpanded)

 

 

{

 

 

 

if (objRow.Level == 0 || objRow.Level == 1) 
 objRow.IsExpanded = true; }

 

 

}

}

}
}