仿资源浏览器

//仿资源浏览器

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;using System.IO;

namespace TreeViewDemo{ public partial class Form1 : Form { public Form1() { InitializeComponent(); }

private void Form1_Load(object sender, EventArgs e) { //get all drives DriveInfo[] drives = DriveInfo.GetDrives(); //show all drives in the tree foreach (DriveInfo d in drives) { DirectoryInfo root = d.RootDirectory; //create a root node TreeNode node = new TreeNode(); node.Text = root.Name; node.Tag = root; treeView1.Nodes.Add(node); node.Nodes.Add(new TreeNode()); } }

private void treeView1_AfterExpand(object sender, TreeViewEventArgs e) { if (e.Action ==TreeViewAction.Expand) { DirectoryInfo parentFolder = (DirectoryInfo)e.Node.Tag; //get all sub folders DirectoryInfo[] folders = parentFolder.GetDirectories(); e.Node.Nodes.Clear(); //construct sub node foreach (DirectoryInfo folder in folders) { TreeNode folderNode = new TreeNode(); folderNode.Text = folder.Name; folderNode.Tag = folder; e.Node.Nodes.Add(folderNode); } } }

private void btnExpend_Click(object sender, EventArgs e) { //获取当前选中节点 TreeNode selectNode = this.treeView1.SelectedNode; if (selectNode != null) { selectNode.Expand(); } }

private void btnClose_Click(object sender, EventArgs e) { //获取当前选中节点 TreeNode selectNode = this.treeView1.SelectedNode; if (selectNode != null) { selectNode.Collapse(); } }

private void btnExpandAndCollapse_Click(object sender, EventArgs e) { TreeNode selectNode = this.treeView1.SelectedNode; if (selectNode != null) { selectNode.Toggle(); } }

private void btnAdd_Click(object sender, EventArgs e) { TreeNode selectNode = this.treeView1.SelectedNode; if (selectNode != null) { selectNode.Nodes.Add(new TreeNode("新建文件夹")); } }

private void btnDelete_Click(object sender, EventArgs e) { TreeNode selectNode = this.treeView1.SelectedNode; if (selectNode != null) { selectNode.Parent.Nodes.Remove(selectNode); } } }}

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