public void AddItem()
{
DataItem parent = (DataItem)TreeView.SelectedItem;
if (parent == null)
{
parent = TreeView.Items.OfType <DataItem>().First();
}
for (int i = 0; i < 1; i++)
{
DataItem item = new DataItem("New Item " + i);
item.Parent = parent;
parent.Children.Add(item);
}
VirtualizingItemContainer itemContainer = TreeView.GetItemContainer(parent);
if (itemContainer != null)
{
//Update arrow visiblity
TreeView.DataBindItem(parent, itemContainer);
TreeView.Expand(parent);
}
}
public static void ExpandTo <T>(this VirtualizingTreeView treeView, T item, Func <T, T> getParent)
{
if (item == null)
{
return;
}
ItemContainerData containerData = treeView.GetItemContainerData(item);
if (containerData == null)
{
treeView.ExpandTo(getParent(item), getParent);
treeView.Expand(item);
}
else
{
treeView.Expand(item);
}
}
public static void ExpandTo <T>(
this VirtualizingTreeView treeView,
T item,
Func <T, T> getParent)
{
if ((object)item == null)
{
return;
}
if (treeView.GetItemContainerData((object)item) == null)
{
treeView.ExpandTo <T>(getParent(item), getParent);
treeView.Expand((object)item);
}
else
{
treeView.Expand((object)item);
}
}
public void AddItem()
{
DataItem item = new DataItem("New Item");
DataItem parent = m_dataItems[m_counter];
parent.Children.Add(item);
TreeView.AddChild(parent, item);
TreeView.Expand(parent);
DataItem subItem = new DataItem("New Sub Item");
item.Children.Add(subItem);
TreeView.AddChild(item, subItem);
TreeView.Expand(item);
m_counter++;
m_counter %= m_dataItems.Count;
}
public void Add()
{
foreach (DataItem parent in TreeView.SelectedItems)
{
DataItem item = new DataItem("New Item");
parent.Children.Add(item);
item.Parent = parent;
TreeView.AddChild(parent, item);
TreeView.Expand(parent);
DataItem subItem = new DataItem("New Sub Item");
item.Children.Add(subItem);
subItem.Parent = item;
TreeView.AddChild(item, subItem);
TreeView.Expand(item);
m_counter++;
}
}
public static void ExpandChildren <T>(this VirtualizingTreeView treeView, T item, Func <T, IEnumerable> getChildren)
{
IEnumerable children = getChildren(item);
if (children != null)
{
treeView.Expand(item);
foreach (T child in children)
{
treeView.ExpandChildren(child, getChildren);
}
}
}
public static void ExpandChildren <T>(
this VirtualizingTreeView treeView,
T item,
Func <T, IEnumerable> getChildren)
{
IEnumerable enumerable = getChildren(item);
if (enumerable == null)
{
return;
}
treeView.Expand((object)item);
foreach (T obj in enumerable)
{
treeView.ExpandChildren <T>(obj, getChildren);
}
}