tree.cs

ASP C#代码实例 适合初学人士学习使用

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

namespace Example_12_12
{
	/// <summary>
	/// Tree 的摘要说明。
	/// </summary>
	public class Tree
	{		
		public void  BindTreeView(TreeView treeView,DataTable dt)
		{
			treeView.Nodes.Clear();                    // 清空树

			TreeNode rootnode = new TreeNode();
			rootnode.Text = "根目录";                  // 给节点绑定显示值
			rootnode.NodeData = "-1";                  // 给节点绑定key值
			rootnode.Expanded = true;                  //　默认根结点为展开
			treeView.Nodes.Add(rootnode);

			CreateChildNode(rootnode,dt);             //　加入所有根结点以下的结点　												
		}
		
		public void CreateChildNode(TreeNode parentnode,DataTable dt)
		{
			DataRow[] rowlist = dt.Select("FatherID='" + parentnode.NodeData.ToString() + "'");
			
			foreach(DataRow row in rowlist)
			{
				TreeNode tempnode = new TreeNode();
				tempnode.Text = row["Info"].ToString();
				tempnode.NodeData = row["DirectoryID"].ToString();				
				tempnode.Expanded = true;
				parentnode.Nodes.Add(tempnode);
				CreateChildNode(tempnode,dt);
			}
		}
	}
}