treeview的checkbox展开节点

protected void ListTreeView_TreeNodeExpanded(object sender, TreeNodeEventArgs e)
{
//同级只展开一个使用下列程序
//TreeNodeCollection ts = null;
if (e.Node.Parent == null)
{
ts = ((TreeView)sender).Nodes;
}
else
ts = e.Node.Parent.ChildNodes;
foreach (TreeNode node in ts)
{
if (node != e.Node)
{
node.Collapse();
}
}
//只展开一个第一级使用下列程序
TreeNodeCollection ts = null;
if (e.Node.Parent == null)
{
ts = ((TreeView)sender).Nodes;
foreach (TreeNode node in ts)
{
if (node != e.Node)
{
node.Collapse();
}
}
}
}
protected void ListTreeView_SelectedNodeChanged(object sender, EventArgs e)
{
for (int i = 0; i < this.ListTreeView.Nodes.Count; i++ )
{
if (this.ListTreeView.SelectedValue == this.ListTreeView.Nodes[i].Value)
{
this.ListTreeView.SelectedNode.Expanded = true;
}
else
{
for (int j = 0; j < this.ListTreeView.SelectedNode.Parent.ChildNodes.Count;j++ )
{
this.ListTreeView.SelectedNode.Parent.ChildNodes[j].CollapseAll();

}
this.ListTreeView.SelectedNode.Parent.Expanded = true;
this.ListTreeView.SelectedNode.Expanded = true;
}
}
}