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/* Quote from
Programming .NET Windows Applications
By Jesse Liberty, Dan Hurwitz
First Edition October 2003
Pages: 1246 (More details)
*/
using System;
using System.Drawing;
using System.Windows.Forms;
using System.IO; // necessary for Directory info
public class TreeViewDirectories : Form
{
TreeView tvw;
CheckBox cb;
Button btnSelected;
Button btnExpand;
Button btnExpandAll;
Button btnCollapse;
Button btnCollapseAll;
Button btnToggle;
public TreeViewDirectories()
{
Size = new Size(400,600);
ImageList imgList = new ImageList();
Image img;
String[] arFiles = {"1.ico","2.ico","3.ico",".ico"};
for (int i = 0; i < arFiles.Length; i++)
{
img = Image.FromFile(arFiles[i]);
imgList.Images.Add(img);
}
tvw = new TreeView();
tvw.Parent = this;
tvw.Location = new Point(10,10);
tvw.Size = new Size(ClientSize.Width - 20, Height - 200);
tvw.Anchor = AnchorStyles.Top | AnchorStyles.Left |
AnchorStyles.Right | AnchorStyles.Bottom;
tvw.BackColor = Color.Moccasin;
tvw.ForeColor = Color.DarkRed;
tvw.BorderStyle = BorderStyle.Fixed3D;
tvw.FullRowSelect = false;
tvw.ShowLines = true;
tvw.ShowPlusMinus = true;
tvw.Scrollable = true;
tvw.HideSelection = false;
tvw.HotTracking = true;
tvw.ImageList = imgList;
tvw.ImageIndex = 1;
tvw.SelectedImageIndex = 2;
tvw.Indent = 35;
tvw.Font = new Font("Times New Roman", 20f);
tvw.ItemHeight = tvw.Font.Height * 2;
tvw.BeforeExpand += new TreeViewCancelEventHandler(tvw_BeforeExpand);
cb = new CheckBox();
cb.Parent = this;
cb.Location = new Point((Width - cb.Width) * 2 / 10, tvw.Bottom + 25);
cb.Text = "Show Files";
cb.Anchor = AnchorStyles.Bottom;
cb.CheckedChanged += new EventHandler(cb_CheckedChanged);
btnSelected = new Button();
btnSelected.Parent = this;
btnSelected.Text = "&SelectedNode";
int xSize = ((int)(Font.Height * .75) * btnSelected.Text.Length);
int ySize = Font.Height + 10;
btnSelected.Size = new Size(xSize, ySize);
btnSelected.Location = new Point(cb.Left, cb.Bottom + ySize);
btnSelected.Anchor = AnchorStyles.Bottom;
btnSelected.Click += new EventHandler(btnSelected_Click);
btnToggle = new Button();
btnToggle.Parent = this;
btnToggle.Location = new Point((Width - cb.Width) * 7 / 10,
cb.Top);
btnToggle.Text = "&Toggle";
btnToggle.Size = new Size(btnSelected.Width, btnSelected.Height);
btnToggle.Anchor = AnchorStyles.Bottom;
btnToggle.Click += new EventHandler(btnToggle_Click);
btnExpand = new Button();
btnExpand.Parent = this;
btnExpand.Location = new Point(btnToggle.Left, btnToggle.Bottom);
btnExpand.Text = "&Expand";
btnExpand.Size = new Size(btnSelected.Width, btnSelected.Height);
btnExpand.Anchor = AnchorStyles.Bottom;
btnExpand.Click += new EventHandler(btnExpand_Click);
btnExpandAll = new Button();
btnExpandAll.Parent = this;
btnExpandAll.Location = new Point(btnExpand.Left, btnExpand.Bottom);
btnExpandAll.Text = "Expand &All";
btnExpandAll.Size = new Size(btnSelected.Width, btnSelected.Height);
btnExpandAll.Anchor = AnchorStyles.Bottom;
btnExpandAll.Click += new EventHandler(btnExpandAll_Click);
btnCollapse = new Button();
btnCollapse.Parent = this;
btnCollapse.Location = new Point(btnExpandAll.Left, btnExpandAll.Bottom);
btnCollapse.Text = "&Collapse";
btnCollapse.Size = new Size(btnSelected.Width, btnSelected.Height);
btnCollapse.Anchor = AnchorStyles.Bottom;
btnCollapse.Click += new EventHandler(btnCollapse_Click);
btnCollapseAll = new Button();
btnCollapseAll.Parent = this;
btnCollapseAll.Location = new Point(btnCollapse.Left, btnCollapse.Bottom);
btnCollapseAll.Text = "Colla&pse All";
btnCollapseAll.Size = new Size(btnSelected.Width, btnSelected.Height);
btnCollapseAll.Anchor = AnchorStyles.Bottom;
btnCollapseAll.Click += new EventHandler(btnCollapseAll_Click);
FillDirectoryTree();
}
static void Main()
{
Application.Run(new TreeViewDirectories());
}
private void FillDirectoryTree()
{
tvw.BeginUpdate();
tvw.Nodes.Clear();
string[] strDrives = Environment.GetLogicalDrives();
foreach (string rootDirectoryName in strDrives)
{
try
{
Directory.GetDirectories(rootDirectoryName);
TreeNode ndRoot = new TreeNode(rootDirectoryName);
tvw.Nodes.Add(ndRoot);
if (ndRoot.Index % 2 == 0)
{
ndRoot.BackColor = Color.LightYellow;
ndRoot.ForeColor = Color.Green;
}
GetSubDirectoryNodes(ndRoot, cb.Checked);
}
catch (System.IO.IOException)
{
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
}
tvw.EndUpdate();
}
private void GetSubDirectoryNodes(TreeNode parentNode, bool getFileNames)
{
DirectoryInfo di = new DirectoryInfo(parentNode.FullPath);
if ((di.Attributes & FileAttributes.Directory) == 0)
{
return;
}
parentNode.Nodes.Clear();
string[] arSubs = Directory.GetDirectories(parentNode.FullPath);
foreach (string subDir in arSubs)
{
DirectoryInfo dirInfo = new DirectoryInfo(subDir);
if ((dirInfo.Attributes & FileAttributes.Hidden)!= 0)
{
continue;
}
TreeNode subNode = new TreeNode(dirInfo.Name);
parentNode.Nodes.Add(subNode);
// Set colors based on Index property.
if (subNode.Index % 2 == 0)
subNode.BackColor = Color.LightPink;
}
if (getFileNames)
{
// Get any files for this node.
string[] files = Directory.GetFiles(parentNode.FullPath);
// After placing the nodes,
// now place the files in that subdirectory.
foreach (string str in files)
{
FileInfo fi = new FileInfo(str);
TreeNode fileNode = new TreeNode(fi.Name);
parentNode.Nodes.Add(fileNode);
// Set the icon
fileNode.ImageIndex = 0;
fileNode.SelectedImageIndex = 3;
// Set colors based on Index property.
if (fileNode.Index % 2 == 0)
fileNode.BackColor = Color.LightGreen;
}
}
} // close GetSubDirectoryNodes
private void cb_CheckedChanged(object sender, EventArgs e)
{
FillDirectoryTree();
}
private void tvw_BeforeExpand(object sender,
TreeViewCancelEventArgs e)
{
tvw.BeginUpdate();
foreach (TreeNode tn in e.Node.Nodes)
{
GetSubDirectoryNodes(tn, cb.Checked);
}
tvw.EndUpdate();
}
private void btnSelected_Click(object sender, EventArgs e)
{
MessageBox.Show(tvw.SelectedNode.ToString() + "\n" +
"FullPath:\t" + tvw.SelectedNode.FullPath.ToString() + "\n" +
"Index:\t" + tvw.SelectedNode.Index.ToString());
}
private void btnExpand_Click(object sender, EventArgs e)
{
tvw.SelectedNode.Expand();
}
private void btnExpandAll_Click(object sender, EventArgs e)
{
tvw.SelectedNode.ExpandAll();
}
private void btnCollapse_Click(object sender, EventArgs e)
{
tvw.SelectedNode.Collapse();
}
private void btnCollapseAll_Click(object sender, EventArgs e)
{
tvw.CollapseAll();
}
private void btnToggle_Click(object sender, EventArgs e)
{
tvw.SelectedNode.Toggle();
}
}
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