Csharp/C Sharp by API/System.Windows.Forms/TreeNode
new TreeNode
<source lang="csharp"> using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; public class Form1 : Form {
private System.Windows.Forms.TreeView directoryTreeView;
string substringDirectory;
public Form1() {
InitializeComponent();
directoryTreeView.Nodes.Clear();
String path = "c:\\Temp";
directoryTreeView.Nodes.Add( path );
PopulateTreeView(path, directoryTreeView.Nodes[ 0 ] );
}
public void PopulateTreeView(string directoryValue, TreeNode parentNode )
{
string[] directoryArray =
Directory.GetDirectories( directoryValue );
try
{
if ( directoryArray.Length != 0 )
{
foreach ( string directory in directoryArray )
{
substringDirectory = directory.Substring(
directory.LastIndexOf( "\\" ) + 1,
directory.Length - directory.LastIndexOf( "\\" ) - 1 );
TreeNode myNode = new TreeNode( substringDirectory );
parentNode.Nodes.Add( myNode );
PopulateTreeView( directory, myNode );
}
}
} catch ( UnauthorizedAccessException ) {
parentNode.Nodes.Add( "Access denied" );
} // end catch
}
private void InitializeComponent()
{
this.directoryTreeView = new System.Windows.Forms.TreeView();
this.SuspendLayout();
//
// directoryTreeView
//
this.directoryTreeView.Location = new System.Drawing.Point(12, 77);
this.directoryTreeView.Name = "directoryTreeView";
this.directoryTreeView.Size = new System.Drawing.Size(284, 265);
this.directoryTreeView.TabIndex = 0;
//
// TreeViewDirectoryStructureForm
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(304, 354);
this.Controls.Add(this.directoryTreeView);
this.Name = "TreeViewDirectoryStructureForm";
this.Text = "TreeViewDirectoryStructure";
this.ResumeLayout(false);
this.PerformLayout();
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
</source>
TreeNode.BackColor
<source lang="csharp">
using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public partial class Form1 : Form {
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
treeView1.Nodes.Clear();
treeView1.ShowNodeToolTips = true;
TreeNode evenNumbers = treeView1.Nodes.Add("Even", "Even Numbers", 0,1);
evenNumbers.BackColor = Color.Blue;
evenNumbers.ForeColor = Color.Yellow;
evenNumbers.ToolTipText = "The even numbers";
TreeNode oddNumbers = treeView1.Nodes.Add("Odd", "Odd Numbers", 0,1);
oddNumbers.BackColor = Color.Yellow;
oddNumbers.ForeColor = Color.Blue;
oddNumbers.ToolTipText = "The odd numbers";
for (int i = 1; i < 50; i++)
{
if (i % 2 == 0)
{
evenNumbers.Nodes.Add(i.ToString());
} else {
oddNumbers.Nodes.Add(i.ToString() );
}
}
}
private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
TreeNode selectedNode = e.Node;
if (selectedNode.Nodes.ContainsKey("1"))
{
Console.WriteLine("This node contains "1"");
}
}
} partial class Form1 {
private void InitializeComponent()
{
this.treeView1 = new System.Windows.Forms.TreeView();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// treeView1
//
this.treeView1.Location = new System.Drawing.Point(16, 50);
this.treeView1.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.treeView1.Name = "treeView1";
this.treeView1.Size = new System.Drawing.Size(194, 149);
this.treeView1.TabIndex = 0;
this.treeView1.NodeMouseClick += new System.Windows.Forms.TreeNodeMouseClickEventHandler(this.treeView1_NodeMouseClick);
//
// button1
//
this.button1.Location = new System.Drawing.Point(16, 15);
this.button1.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(100, 28);
this.button1.TabIndex = 1;
this.button1.Text = "Load";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(229, 213);
this.Controls.Add(this.button1);
this.Controls.Add(this.treeView1);
this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
private System.Windows.Forms.TreeView treeView1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.ImageList imageList1;
} public class TreeViewNodeBackgroundForegroundTooltip {
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
</source>
TreeNode.ToolTipText
<source lang="csharp">
using System; using System.Collections.Generic; using System.ruponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public partial class Form1 : Form {
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
treeView1.Nodes.Clear();
treeView1.ShowNodeToolTips = true;
TreeNode evenNumbers = treeView1.Nodes.Add("Even", "Even Numbers", 0,1);
evenNumbers.BackColor = Color.Blue;
evenNumbers.ForeColor = Color.Yellow;
evenNumbers.ToolTipText = "The even numbers";
TreeNode oddNumbers = treeView1.Nodes.Add("Odd", "Odd Numbers", 0,1);
oddNumbers.BackColor = Color.Yellow;
oddNumbers.ForeColor = Color.Blue;
oddNumbers.ToolTipText = "The odd numbers";
for (int i = 1; i < 50; i++)
{
if (i % 2 == 0)
{
evenNumbers.Nodes.Add(i.ToString());
} else {
oddNumbers.Nodes.Add(i.ToString() );
}
}
}
private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
{
TreeNode selectedNode = e.Node;
if (selectedNode.Nodes.ContainsKey("1"))
{
Console.WriteLine("This node contains "1"");
}
}
} partial class Form1 {
private void InitializeComponent()
{
this.treeView1 = new System.Windows.Forms.TreeView();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// treeView1
//
this.treeView1.Location = new System.Drawing.Point(16, 50);
this.treeView1.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.treeView1.Name = "treeView1";
this.treeView1.Size = new System.Drawing.Size(194, 149);
this.treeView1.TabIndex = 0;
this.treeView1.NodeMouseClick += new System.Windows.Forms.TreeNodeMouseClickEventHandler(this.treeView1_NodeMouseClick);
//
// button1
//
this.button1.Location = new System.Drawing.Point(16, 15);
this.button1.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(100, 28);
this.button1.TabIndex = 1;
this.button1.Text = "Load";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(229, 213);
this.Controls.Add(this.button1);
this.Controls.Add(this.treeView1);
this.Margin = new System.Windows.Forms.Padding(4, 4, 4, 4);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
private System.Windows.Forms.TreeView treeView1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.ImageList imageList1;
} public class TreeViewNodeBackgroundForegroundTooltip {
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
</source>
