datagridview结合treeview的应用

【实例截图】

【核心代码】

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace TreeViewTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        DataTable dt = new DataTable();
        private void Form1_Load(object sender, EventArgs e)
        {   
            dt.Columns.Add("id");
            dt.Columns.Add("value");
            dt.Columns.Add("dis");
            dt.Columns.Add("pre");
            dt.Rows.Add(0, "00", "000", 0);
            dt.Rows.Add(1, "11", "111", 0);
            dt.Rows.Add(2,"22","222",1);
            dt.Rows.Add("a", "a3", "a000", "a");
            dt.Rows.Add("b", "b2", "b111", "a");
            dt.Rows.Add("c", "c1", "c222", "a");
            creatTree(dt, treeView1);
            creatDataGridView(dt, dataGridView1);
            dataGridView1.RowHeadersVisible = false;
            treeView1.ItemHeight = dataGridView1.ColumnHeadersHeight 2;
            treeView1.Indent = 5;
            tableChange();
        }
        void creatDataGridView(DataTable dt,DataGridView dgv)
        {           
            dgv.DataSource=dt.DefaultView;           
          
        }
        void creatTree(DataTable dt,TreeView tv)
        {
            if (dt.Rows.Count == 0) return;
            
            
            foreach (DataRow dr in dt.Rows)
            {
              
                if (dr["id"].ToString() == dr["pre"].ToString())
                {
                    
                        tv.Nodes.Add(dr["id"].ToString(), dr["id"].ToString());
                   
                }
                else
                {
                    TreeNode[] t=tv.Nodes.Find(dr["pre"].ToString(),true);

                    if (t.Length < 1)
                        return;
                    else
                        t[0].Nodes.Add(dr["id"].ToString(), dr["id"].ToString());
                }
                
            }
            tv.Nodes.Insert(0, "ID");
            tv.Nodes[0].BackColor = Color.Silver;
        }

      

       

        private void treeView1_AfterExpand(object sender, TreeViewEventArgs e)
        {
            tableChange();
        }

        private void treeView1_AfterCollapse(object sender, TreeViewEventArgs e)
        {
            tableChange();
        }
        string s;
        public void GetNode(TreeNodeCollection tc)
        {
            foreach (TreeNode TNode in tc)
            {
                if (TNode.IsVisible == false)
                {
                    s  = "id<>'"   TNode.Name   "' and ";
                }
                GetNode(TNode.Nodes);
            }
        }

        void tableChange()
        {
            s = "";
            TreeNodeCollection tc = treeView1.Nodes;
            GetNode(tc);
            if(s.Length>4)
            s = s.Remove(s.Length - 4);
            dt.DefaultView.RowFilter = s;
            dataGridView1.DataSource = dt.DefaultView;
        }
       
    }
}