cscの作法 その475

概要

cscの作法、調べてみた。
練習問題やってみた。

練習問題

treeviewを、使え。

参考にしたページ

写真

サンプルコード

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;

namespace App
{
	class DirTreeNode: TreeNode {
		public DirTreeNode() {
		}
		public DirTreeNode(string directoryName, string directoryPath) : base(directoryName) {
			DirectoryPath = directoryPath;
		}
		public string DirectoryPath {
			get;
			set;
		}
	}
	public partial class Form1: Form {
		private TreeView treeView1;
		public Form1() {
			ClientSize = new Size(500, 300);
			Text = "TreeView";
			treeView1 = new TreeView();
			SuspendLayout();
			treeView1.Dock = DockStyle.Fill;
			treeView1.HotTracking = true;
			//treeView1.ImageList = imageList1;
			treeView1.Location = new Point(10, 10);
			treeView1.Name = "treeView1";
			treeView1.Size = new Size(480, 280);
			treeView1.TabIndex = 0;
			treeView1.BeforeExpand += new TreeViewCancelEventHandler(treeView1_BeforeExpand);
			Controls.AddRange(new Control[] {
				treeView1
			});
			DirTreeNode driveNode = new DirTreeNode("C:Neos", "C:\\Neos");
			treeView1.Nodes.Add(driveNode);
			driveNode.Nodes.Add(new DirTreeNode());
		}
		private void treeView1_BeforeExpand(object sender, TreeViewCancelEventArgs e) {
			DirTreeNode dirNode = (DirTreeNode) e.Node;
			dirNode.Nodes.Clear();
			foreach (string directoryPath in Directory.GetDirectories(dirNode.DirectoryPath))
			{
				DirectoryInfo directoryInfo = new DirectoryInfo(directoryPath);
				if ((directoryInfo.Attributes & FileAttributes.System) != FileAttributes.System)
				{
					DirTreeNode subDirNode = new DirTreeNode(directoryInfo.Name, directoryPath);
					dirNode.Nodes.Add(subDirNode);
					if (Directory.GetDirectories(directoryPath).Length > 0)
					{
						subDirNode.Nodes.Add(new DirTreeNode());
					}
				}
			}
		}
		[STAThread]
		static void Main() {
			Application.Run(new Form1());
		}
	}
}

以上。