TreeView数据绑定方法

Code
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Data .SqlClient;
using System.Data.OleDb;

public partial class TreeView数据绑定方法 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            BindTree();
            //InitTree();
        }
    }
    主从表绑定#region 主从表绑定
    private void BindTree()
    {
        DataSet dst = GetTreeViewData();
        TreeView1.ShowCheckBoxes = TreeNodeTypes.All;
        foreach (DataRow masterRow in dst.Tables["province"].Rows)
        {
            TreeNode masterNode = new TreeNode((string)masterRow["province"]);
            TreeView1.Nodes.Add(masterNode);
            foreach (DataRow childRow in masterRow.GetChildRows("Children"))
            {
                TreeNode childNode =new TreeNode((string)childRow["city"]);
                masterNode.Expanded = false;
                masterNode.ChildNodes.Add(childNode);
            }
        }
    }

    private DataSet GetTreeViewData()
    {
        //string constring = ConfigurationManager.ConnectionStrings["ConnectionStr"].ToString();
        string constring = System.Configuration.ConfigurationSettings.AppSettings["OleConnection"].ToString(); 
        OleDbConnection con = new OleDbConnection(constring);
        OleDbDataAdapter daprovince = new OleDbDataAdapter("SELECT * FROM province", con);
        OleDbDataAdapter dacity = new OleDbDataAdapter("SELECT * FROM city", con);
        DataSet ds = new DataSet();
        daprovince.Fill(ds, "province");
        dacity.Fill(ds, "city");
        ds.Relations.Add("Children", ds.Tables["province"].Columns["provinceid"], ds.Tables["city"].Columns["father"]);
        return ds;
    }
    #endregion

    递归绑定同一个表数据#region 递归绑定同一个表数据
    private void InitTree()
    {
        DataTable dt = GetTreeViewTable();
        DataView dv = new DataView(dt);
        dv.RowFilter = "ParentID=0";
        TreeView1.ShowCheckBoxes = TreeNodeTypes.All;
        foreach (DataRowView drv in dv)
        {
            TreeNode node = new TreeNode();
            node.Text = drv["text"].ToString();
            node.Value = drv["ID"].ToString();
            node.Expanded = false;
            TreeView1.Nodes.Add(node);
            AddReplies(dt,node);
        }
    }

    private DataTable GetTreeViewTable()
    {
        string constring = ConfigurationManager.ConnectionStrings["ConnectionStr"].ToString();
        OleDbConnection con = new OleDbConnection(constring);
        OleDbDataAdapter da = new OleDbDataAdapter("SELECT * FROM treeview", con);
        DataTable dt = new DataTable();
        da.Fill(dt);
        return dt;
    }

    private void AddReplies(DataTable dt, TreeNode node)
    {
        DataView dv = new DataView(dt);
        dv.RowFilter = "ParentID='" + node.Value + "'";
        foreach (DataRowView row in dv)
        {
            TreeNode replyNode = new TreeNode();
            replyNode.Text = row["text"].ToString();
            replyNode.Value = row["ID"].ToString();
            replyNode.Expanded = false;
            node.ChildNodes.Add(replyNode);
            AddReplies(dt,replyNode);
        }
    }
    #endregion
}