ADO-ODBC

Development Platform:
C#

Form1.cs：Code Content
							using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
namespace ch3_4
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.TreeView treeView1;
		private System.Windows.Forms.ImageList imageList1;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.CheckBox checkBox1;
		private System.Windows.Forms.CheckBox checkBox2;
		private System.Windows.Forms.CheckBox checkBox3;
		private System.Windows.Forms.CheckBox checkBox4;
		private System.Windows.Forms.CheckBox checkBox5;
		private System.Windows.Forms.CheckBox checkBox6;
		private System.Windows.Forms.CheckBox checkBox7;
		private System.ComponentModel.IContainer components;
		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();
			//初始化TreeView的根节点
			InitialTreeView();
		
			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}
		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}
           
		private void InitialTreeView()
		{
		    //将驱动器字符串数组设为空
			string[] drivers=null;
			//检索此计算机上逻辑驱动器的名称
			drivers=Directory.GetLogicalDrives();
			int i=0;
			//初始化每一个逻辑驱动器
			while ( i<drivers.GetLength(0))
			{
				this.treeView1.Nodes.Add(new TreeNode(drivers[i],1,1));
				string path=drivers[i];
				string[] dirs=null;
				try
				{
					//获得指定驱动器中第一级目录的名称
					dirs=Directory.GetDirectories(path);
				}
				catch(Exception  error)
				{
					//错误处理为空，即忽略
				}
				if (dirs!=null)
				{
					//为每一个代表驱动器的根节点添加子节点
					for (int j=0;j<dirs.Length;j++)
					{
						//获得节点的去掉路径后的目录名
						TreeNode node = new TreeNode(dirs[j].ToString().Substring(dirs[j].ToString().LastIndexOf("\")+1));
						//设置不选定状态下的图标
						node.ImageIndex =2;
						//设置打开状态下的图标
						node.SelectedImageIndex =0;
						//添加节点
						this.treeView1.Nodes[i].Nodes.Add(node);
					}
				}
				//继续下一个循环
				i++; 
			}
		
		}
		#region Windows Form Designer generated code
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			this.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
			this.treeView1 = new System.Windows.Forms.TreeView();
			this.imageList1 = new System.Windows.Forms.ImageList(this.components);
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.checkBox1 = new System.Windows.Forms.CheckBox();
			this.checkBox2 = new System.Windows.Forms.CheckBox();
			this.checkBox3 = new System.Windows.Forms.CheckBox();
			this.checkBox4 = new System.Windows.Forms.CheckBox();
			this.checkBox5 = new System.Windows.Forms.CheckBox();
			this.checkBox6 = new System.Windows.Forms.CheckBox();
			this.checkBox7 = new System.Windows.Forms.CheckBox();
			this.groupBox1.SuspendLayout();
			this.SuspendLayout();
			// 
			// treeView1
			// 
			this.treeView1.Dock = System.Windows.Forms.DockStyle.Left;
			this.treeView1.ImageList = this.imageList1;
			this.treeView1.Name = "treeView1";
			this.treeView1.Size = new System.Drawing.Size(292, 341);
			this.treeView1.TabIndex = 0;
			this.treeView1.BeforeExpand += new System.Windows.Forms.TreeViewCancelEventHandler(this.treeView1_BeforeExpand);
			// 
			// imageList1
			// 
			this.imageList1.ColorDepth = System.Windows.Forms.ColorDepth.Depth8Bit;
			this.imageList1.ImageSize = new System.Drawing.Size(16, 16);
			this.imageList1.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList1.ImageStream")));
			this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
			// 
			// groupBox1
			// 
			this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
																					this.checkBox7,
																					this.checkBox6,
																					this.checkBox5,
																					this.checkBox4,
																					this.checkBox3,
																					this.checkBox2,
																					this.checkBox1});
			this.groupBox1.Location = new System.Drawing.Point(320, 24);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(200, 304);
			this.groupBox1.TabIndex = 1;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "样式";
			// 
			// checkBox1
			// 
			this.checkBox1.Location = new System.Drawing.Point(40, 32);
			this.checkBox1.Name = "checkBox1";
			this.checkBox1.TabIndex = 0;
			this.checkBox1.Text = "排序";
			this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
			// 
			// checkBox2
			// 
			this.checkBox2.Checked = true;
			this.checkBox2.CheckState = System.Windows.Forms.CheckState.Checked;
			this.checkBox2.Location = new System.Drawing.Point(40, 69);
			this.checkBox2.Name = "checkBox2";
			this.checkBox2.Size = new System.Drawing.Size(128, 24);
			this.checkBox2.TabIndex = 1;
			this.checkBox2.Text = "显示节点间线条";
			this.checkBox2.CheckedChanged += new System.EventHandler(this.checkBox2_CheckedChanged);
			// 
			// checkBox3
			// 
			this.checkBox3.Checked = true;
			this.checkBox3.CheckState = System.Windows.Forms.CheckState.Checked;
			this.checkBox3.Location = new System.Drawing.Point(40, 106);
			this.checkBox3.Name = "checkBox3";
			this.checkBox3.Size = new System.Drawing.Size(136, 24);
			this.checkBox3.TabIndex = 2;
			this.checkBox3.Text = "显示根节点间线条";
			this.checkBox3.CheckedChanged += new System.EventHandler(this.checkBox3_CheckedChanged);
			// 
			// checkBox4
			// 
			this.checkBox4.Location = new System.Drawing.Point(40, 143);
			this.checkBox4.Name = "checkBox4";
			this.checkBox4.TabIndex = 3;
			this.checkBox4.Text = "显示复选框";
			this.checkBox4.CheckedChanged += new System.EventHandler(this.checkBox4_CheckedChanged);
			// 
			// checkBox5
			// 
			this.checkBox5.Checked = true;
			this.checkBox5.CheckState = System.Windows.Forms.CheckState.Checked;
			this.checkBox5.Location = new System.Drawing.Point(40, 180);
			this.checkBox5.Name = "checkBox5";
			this.checkBox5.TabIndex = 4;
			this.checkBox5.Text = "显示+ - 按钮";
			this.checkBox5.CheckedChanged += new System.EventHandler(this.checkBox5_CheckedChanged);
			// 
			// checkBox6
			// 
			this.checkBox6.Checked = true;
			this.checkBox6.CheckState = System.Windows.Forms.CheckState.Checked;
			this.checkBox6.Location = new System.Drawing.Point(40, 217);
			this.checkBox6.Name = "checkBox6";
			this.checkBox6.TabIndex = 5;
			this.checkBox6.Text = "隐藏选择";
			this.checkBox6.CheckedChanged += new System.EventHandler(this.checkBox6_CheckedChanged);
			// 
			// checkBox7
			// 
			this.checkBox7.Location = new System.Drawing.Point(40, 254);
			this.checkBox7.Name = "checkBox7";
			this.checkBox7.TabIndex = 6;
			this.checkBox7.Text = "鼠标变色";
			this.checkBox7.CheckedChanged += new System.EventHandler(this.checkBox7_CheckedChanged);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(552, 341);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.groupBox1,
																		  this.treeView1});
			this.Name = "Form1";
			this.Text = "查看磁盘与目录";
			this.groupBox1.ResumeLayout(false);
			this.ResumeLayout(false);
		}
		#endregion
		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}
		private void treeView1_BeforeExpand(object sender, System.Windows.Forms.TreeViewCancelEventArgs e)
		{
			
            //获取发出信息的节点
			TreeNode node=e.Node;
			//设置它为treeView的当前节点
			this.treeView1.SelectedNode=node;
			string path=node.FullPath;
			string[] dirs=null;
			try
			{
				//获得当前节点所有的子节点
				dirs=Directory.GetDirectories(path);
			}
			catch(Exception  error)
			{
				//错误处理为空，即忽略
			}
            
			if (dirs!=null)
			{
				//为每一个当前节点的字节点添加子节点
				for (int j=0;j<dirs.Length;j++)
				{	
					//如果当前节点的子节点数为0，则为它添加子节点
					//否则说明已经添加过或则没有子目录
					if (node.Nodes[j].Nodes.Count==0)
					{
						//调用函数为子节点添加子节点
						addDirectroy(node.Nodes[j],dirs[j]);
					}
					
				}
			}
		}
		private void addDirectroy(TreeNode node,string path)
		{
			
				string[] dirs=null;
				try
				{
					dirs=Directory.GetDirectories(path);
				}
				catch(Exception  e)
				{
					//错误处理为空，即忽略
				}
				for (int j=0;j<dirs.Length;j++)
				{
					//添加新的子节点
					TreeNode nodeNew= new TreeNode(dirs[j].ToString().Substring(dirs[j].ToString().LastIndexOf("\")+1));
					//设置不选定状态下的图标
					nodeNew.ImageIndex =2;
					//设置打开状态下的图标
					nodeNew.SelectedImageIndex =0;
					node.Nodes.Add(nodeNew);
				}
		
		}
		
		private void checkBox1_CheckedChanged(object sender, System.EventArgs e)
		{
			this.treeView1.Sorted = this.checkBox1.Checked;
		}
		private void checkBox2_CheckedChanged(object sender, System.EventArgs e)
		{
			this.treeView1.ShowLines=this.checkBox2.Checked;
		}
		private void checkBox3_CheckedChanged(object sender, System.EventArgs e)
		{
			this.treeView1.ShowRootLines=this.checkBox3.Checked;
		}
		private void checkBox4_CheckedChanged(object sender, System.EventArgs e)
		{
			this.treeView1.CheckBoxes=this.checkBox4.Checked;
		}
        private void checkBox5_CheckedChanged(object sender, System.EventArgs e)
		{
			this.treeView1.ShowPlusMinus=this.checkBox5.Checked;
		}
		private void checkBox6_CheckedChanged(object sender, System.EventArgs e)
		{
			this.treeView1.HideSelection=this.checkBox6.Checked;
		}
		private void checkBox7_CheckedChanged(object sender, System.EventArgs e)
		{
			this.treeView1.HotTracking=this.checkBox7.Checked;
		}
	}
}

						