/// <summary>
/// 设置当即选中树节点
/// </summary>
/// <param name="node">The node.</param>
/// User:Ryan CreateTime:2012-9-27 20:14.
private void SetSelectedNode(TreeNodeEx node)
{
this.UpdateText(node);
if (node is DefaultTreeNode)
{
this.SelectedNode = null;
}
else
{
this.SelectedNode = node;
if (this.OnTreeNodeSelected != null)
{
TreeNodeEventArgs args = new TreeNodeEventArgs();
args.SelectedNode = this.SelectedNode;
this.OnTreeNodeSelected(this.PopDownTree, args);
}
}
}
/// <summary>
/// 树节点展开处理事件
/// </summary>
/// <param name="sender">(控件对象).The source of the event.</param>
/// <param name="e">(事件数据).The <see cref="System.Windows.Forms.TreeViewCancelEventArgs"/> instance containing the event data.</param>
/// User:Ryan CreateTime:2012-9-27 18:50.
void PopDownTree_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
TreeNodeEx node = e.Node as TreeNodeEx;
if (!node.LeafNode && node.Datasource == null && node.Nodes[0] != null && node.Nodes[0] is EmptyTreeNode)
{
//clear data
node.LeafNode = true;
node.Nodes.Clear();
//实现该事件以加载子节点数据
if (this.LoadChildNodesDataSource != null)
{
TreeNodeEventArgs args = new TreeNodeEventArgs();
args.SelectedNode = node;
this.LoadChildNodesDataSource(sender, args);
//bind data
this.BindChildNode(node, args.DataSource);
}
}
}