protected override void OnBeforeExpand(TreeViewCancelEventArgs e)
{
// Remove the placeholder node.
e.Node.Nodes.Clear();
// We stored the ShellItem object in the node's Tag property - hah!
ShellItem shNode = (ShellItem)e.Node.Tag;
ArrayList arrSub = shNode.GetSubFolders();
foreach (ShellItem shChild in arrSub)
{
TreeNode tvwChild = new TreeNode();
tvwChild.Text = shChild.DisplayName;
tvwChild.ImageIndex = shChild.IconIndex;
tvwChild.SelectedImageIndex = shChild.IconIndex;
tvwChild.Tag = shChild;
// If this is a folder item and has children then add a place holder node.
if (shChild.IsFolder && shChild.HasSubFolder)
{
tvwChild.Nodes.Add("PH");
}
e.Node.Nodes.Add(tvwChild);
}
base.OnBeforeExpand(e);
}
/// <summary>
/// Loads the root TreeView nodes.
/// </summary>
private void LoadRootNodes()
{
// Create the root shell item.
ShellItem m_shDesktop = new ShellItem();
// Create the root node.
TreeNode tvwRoot = new TreeNode();
tvwRoot.Text = m_shDesktop.DisplayName;
tvwRoot.ImageIndex = m_shDesktop.IconIndex;
tvwRoot.SelectedImageIndex = m_shDesktop.IconIndex;
tvwRoot.Tag = m_shDesktop;
// Now we need to add any children to the root node.
ArrayList arrChildren = m_shDesktop.GetSubFolders();
foreach (ShellItem shChild in arrChildren)
{
TreeNode tvwChild = new TreeNode();
tvwChild.Text = shChild.DisplayName;
tvwChild.ImageIndex = shChild.IconIndex;
tvwChild.SelectedImageIndex = shChild.IconIndex;
tvwChild.Tag = shChild;
// If this is a folder item and has children then add a place holder node.
if (shChild.IsFolder && shChild.HasSubFolder)
tvwChild.Nodes.Add("PH");
tvwRoot.Nodes.Add(tvwChild);
}
// Add the root node to the tree.
treeWnd.Nodes.Clear();
treeWnd.Nodes.Add(tvwRoot);
tvwRoot.Expand();
}
/// <summary>
/// Loads the root TreeView nodes.
/// </summary>
private void LoadRootNodes()
{
// Create the root shell item.
m_shDesktop = new ShellItem();
// Create the root node.
TreeNode tvwRoot = new TreeNode();
tvwRoot.Text = m_shDesktop.DisplayName;
tvwRoot.ImageIndex = m_shDesktop.IconIndex;
tvwRoot.SelectedImageIndex = m_shDesktop.IconIndex;
tvwRoot.Tag = m_shDesktop;
// Now we need to add any children to the root node.
ArrayList arrChildren = m_shDesktop.GetSubFolders();
foreach (ShellItem shChild in arrChildren)
{
TreeNode tvwChild = new TreeNode();
tvwChild.Text = shChild.DisplayName;
tvwChild.ImageIndex = shChild.IconIndex;
tvwChild.SelectedImageIndex = shChild.IconIndex;
tvwChild.Tag = shChild;
// If this is a folder item and has children then add a place holder node.
if (shChild.IsFolder && shChild.HasSubFolder)
{
tvwChild.Nodes.Add("PH");
}
tvwRoot.Nodes.Add(tvwChild);
}
// Add the root node to the tree.
treeWnd.Nodes.Clear();
treeWnd.Nodes.Add(tvwRoot);
tvwRoot.Expand();
}