Winform TreeView的用法

   C# 中 TreeView绑定数据库数据，目前这个这个只是一个demo,在项目中运用有些欠缺，以后会进行完善...

 

DataSet ds = sysDicTypeBll.GetAllList();
            //把其他节点加上去   
            if (ds != null)
            {
                //往TreeView中添加树节点
                //添加根节点
                TreeNode tn = new TreeNode();
                tn.Text = "所有数据字典类型";
                tn.Name = "0";
                tv.Nodes.Add(tn);
                tv.SelectedNode = tv.TopNode;
                //把其他节点加上去
                if (ds != null)
                {
                    foreach (DataRow dr in ds.Tables[0].Rows)
                    {
                        tn = new TreeNode();
                        tn.Text = dr["DicTypeName"].ToString();
                        tn.Name = dr["DicTypeId"].ToString();
                        tv.SelectedNode.Nodes.Add(tn);
                    }
                    tv.ExpandAll();//展开TreeView   
                    tv.SelectedNode = tv.TopNode; //最顶端节点选中   
                }
            }

C# 中 TreeView  常用的一些方法，属于个人收集及总结

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace ShangwuFrame.CommonUI
{
    public class TreeUtil
    {
        /// <summary>
        /// 从数据库查询添加新的树节点到指定的父接点上
        /// </summary>
        /// <param name="parenTn">父接点</param>
        /// <param name="newTn">新节点</param>
        /// <param name="nodeText">新节点显示文本</param>
        /// <param name="nodeName">新接点唯一值，数据表中的ID</param>
        public static void AddTreeNode(TreeNode parenTn, TreeNode newTn, string nodeText, string nodeName)
        {
            newTn = new TreeNode(nodeText);
            newTn.Name = nodeName;
            parenTn.Nodes.Add(newTn);
        }

        /// <summary>
        /// 添加数据到数据库的同时把数据添加到指定的树节点
        /// </summary>
        /// <param name="treeview">treeview组件</param>
        /// <param name="parenTn">父节点</param>
        /// <param name="newTn">新节点</param>
        /// <param name="nodeText">新节点显示文本</param>
        /// <param name="id">新接点唯一值，数据表中的ID</param>
        /// <param name="selectName">所选数据的ID，用于查询指定的树节点</param>
        public static void InsertTreeNode(TreeView treeview, TreeNode parenTn, TreeNode newTn, string nodeText, int id, string selectName)
        {
            int ok = 0;  //0代表还没找到节点，1为找到节点
            TreeNode selectedNode;
            newTn = new TreeNode(nodeText);
            newTn.Name = id.ToString();
            if (selectName != "")
            {
                for (int i = 0; i < treeview.Nodes.Count; i++)
                {
                    parenTn = treeview.Nodes[i];
                    for (int j = 0; j < parenTn.Nodes.Count; j++)
                    {
                        if (parenTn.Nodes[j].Name == selectName)
                        {
                            selectedNode = parenTn.Nodes[j];
                            selectedNode.Nodes.Add(newTn);
                            ok = 1;
                            break;
                        }
                    }
                    if (ok == 1)
                    {
                        break;
                    }
                }
            }
            else
            {
                treeview.Nodes.Add(newTn);
            }
        }


        public static void InsertTreeNode(TreeView treeview, TreeNode parenTn, string nodeText, int id, string selectName)
        {
            int ok = 0;  //0代表还没找到节点，1为找到节点
            TreeNode selectedNode;
            parenTn = new TreeNode(nodeText);
            parenTn.Name = id.ToString();
            if (selectName != "")
            {
                for (int j = 0; j < treeview.Nodes.Count; j++)
                {
                    if (treeview.Nodes[j].Name == selectName)
                    {
                        selectedNode = treeview.Nodes[j];
                        selectedNode.Nodes.Add(parenTn);
                        ok = 1;
                        break;
                    }
                }
            }
        }


        /// <summary>
        /// 添加数据到数据库的同时把数据添加到指定的树节点
        /// </summary>
        /// <param name="parenTn">父节点</param>
        /// <param name="newTn">新节点</param>
        /// <param name="nodeText">新节点显示文本</param>
        /// <param name="id">新接点唯一值，数据表中的ID</param>
        /// <param name="selectName">所选数据的ID，用于查询指定的树节点</param>
        public static void DirectInsertTreeNode(TreeNode parenTn, TreeNode newTn, string nodeText, int id)
        {
            newTn = new TreeNode(nodeText);
            newTn.Name = id.ToString();
            parenTn.Nodes.Add(newTn);
        }
    }
}