// Mechanism to build a custom BoundTreeNode, supplies the data, currency and position...
private BoundTreeNode CreateNode(DataRowView drv, CurrencyManager cm, int position)
{
// TableBinding object allows us to customize the DisplayMember and ValueMember for each binding
TableBinding tableBinding = GetBinding(drv.Row.Table.TableName);
BoundTreeNode node = null;
if (tableBinding != null)
{
node = new BoundTreeNode(drv[tableBinding.DisplayMember].ToString(), drv[tableBinding.ValueMember], cm, position, tableBinding.ImageIndex, tableBinding.SelectedImageIndex);
}
else
{
// when no binding is supplied, default to the first datarow column...
node = new BoundTreeNode(drv[0].ToString(), drv[0], cm, position, -1, -1);
}
return(node);
}
// When the BoundTreeView's nodes are selected, we must synchronize the CurrencyManagers...
private void tv_AfterSelect(object sender, TreeViewEventArgs e)
{
// We have to move the currency manager positions for every node in the
// selected heirarchy because the parent node selection determines the
// currency manager "list" contents for the children
ArrayList nodeList = new ArrayList();
// Start with the node that has been selected
BoundTreeNode node = (BoundTreeNode)((TreeView)sender).SelectedNode;
nodeList.Add(node);
// Recursively add all the parent nodes
node = (BoundTreeNode)node.Parent;
while (node != null)
{
nodeList.Add(node);
node = (BoundTreeNode)node.Parent;
}
// Don't fire the our own position change event other controls bound to the
// currency managers will move accordingly because we are setting the position
// explicitly
DisablePositionChanged = true;
// Start at the highest parent node
for (int i = nodeList.Count; i > 0; i--)
{
node = (BoundTreeNode)nodeList[i - 1];
((IBindingList)node.CurrencyManager.List).ListChanged -= handlerListChanged;
node.CurrencyManager.Position = node.Position;
((IBindingList)node.CurrencyManager.List).ListChanged += handlerListChanged;
}
DisablePositionChanged = false;
}
