TreeView 配合mdb数据库动态加载数据

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using CPKFLandCheck.src.utils;
using System.Data;

namespace CPKFLandCheck.src.mainWindow
{
    class LoadCheckTree
    {
        /**
         * 加载质检树数据
         * 
         */
        public  void load_CheckTree(TreeView treeView)
        {
            addParent(treeView);
        }

        /// <summary>
        /// 迭代填充父节点
        /// </summary>
        void addParent(TreeView treeView)
        {
            MDBHelp mdbHelp = new MDBHelp();
            var db = mdbHelp.GetDataSet("select ERROR_CODE,ERROR_REQUIRE from CPKF_ERROR where ERROR_REQUIRE_CONTENT is null order by ID");

            foreach (DataTable dt in db.Tables)
            {
                foreach (DataRow dr in dt.Rows) //遍历所有的行
                {
                    String ErrorCode = dr.ItemArray[0].ToString();
                    String ErrorRequire = dr.ItemArray[1].ToString();
                    var node = new TreeNode(ErrorCode + " " + ErrorRequire);
                    treeView.Nodes.Add(node);
                    //迭代填充子节点
                    AddChildren(node, ErrorCode);
                }
            }
        }


        
        /// <summary>
        /// 添加子节点
        /// </summary>
        /// <param name="node"></param>
        /// <param name="pid">pid = parent_id</param>
        void AddChildren(TreeNode pnode,String pid)
        {

            MDBHelp mdbHelp = new MDBHelp();
            var db = mdbHelp.GetDataSet("select ERROR_CODE,ERROR_REQUIRE from (select ERROR_CODE,ERROR_REQUIRE,ERROR_REQUIRE_CONTENT,ERROR_SUGGESTION,ERROR_SUGGESTION_CONTENT from CPKF_ERROR where ERROR_REQUIRE_CONTENT is not null and ERROR_CODE like '" + pid + "%' order by ID) group by ERROR_CODE,ERROR_REQUIRE");
            foreach (DataTable dt in db.Tables)
            {
                foreach (DataRow dr in dt.Rows) //遍历所有的行
                {
                    String ErrorCode = dr.ItemArray[0].ToString();
                    String ErrorRequire = dr.ItemArray[1].ToString();
                    var node = new TreeNode(ErrorCode + " " + ErrorRequire);
                    pnode.Nodes.Add(node);
                }
            }
        }
    }



}