bindtree.cs

计算机学院网站及管理系统

using System;
using System.Data;
using System.Data.SqlClient;
using Microsoft.Web.UI.WebControls;

namespace ComputerWeb
{
	/// <summary>
	/// Summary description for BindTree.
	/// </summary>
	public class BindTree
	{		
		public void  BindTreeView(TreeView treeView,int nCurrentNodeID)
		{
			ClassTreeDB tree = new ClassTreeDB();

			treeView.Nodes.Clear();                   // 清空树

			TreeNode rootnode = new TreeNode();
			rootnode.Text = "目录根";                 // 给节点绑定显示值
			rootnode.NodeData = "0";                  // 给节点绑定key值
			rootnode.Expanded = true;                 //　默认根结点为展开
			treeView.Nodes.Add(rootnode);

			CreateChildNode(rootnode);                //　加入所有根结点以下的结点　												
		}
		
		public void CreateChildNode(TreeNode parentnode)
		{
			ClassTreeDB tree = new ClassTreeDB();
			SqlDataReader rect = tree.GetSubClass(Int32.Parse(parentnode.NodeData.ToString()));
			
			while(rect.Read())
			{
				TreeNode tempnode = new TreeNode();
				tempnode.Text = rect["Description"].ToString();
				tempnode.NodeData = rect["ClassID"].ToString();				
				tempnode.Expanded = true;
				parentnode.Nodes.Add(tempnode);
				CreateChildNode(tempnode);
			}
			rect.Close();
		}
	}
}