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TreeView.BorderStyle Property

Gets or sets the border style of the tree view control.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

public BorderStyle BorderStyle { get; set; }

Property Value

Type: System.Windows.Forms.BorderStyle
One of the BorderStyle values. The default is Fixed3D.


The assigned value is not one of the BorderStyle values.

When the BorderStyle property is set to Fixed3D, the TreeView has a sunken, three-dimensional appearance. To display a flat, thin border around the TreeView control, set the BorderStyle property to FixedSingle.

The following code example demonstrates how to use the BorderStyle enumeration and the BorderStyle, ShowLines, Scrollable, HideSelection and ShowRootLines properties. To run this example, paste the following code in a form and call the InitializeTreeView method in the form's constructor or Load method.

	// Declare the TreeView control. 
	internal System.Windows.Forms.TreeView TreeView1;

	// Initialize the TreeView to blend with the form, giving it the  
	// same color as the form and no border. 
	private void InitializeTreeView()

		// Create a new TreeView control and set the location and size. 
		this.TreeView1 = new System.Windows.Forms.TreeView();
		this.TreeView1.Location = new System.Drawing.Point(72, 48);
		this.TreeView1.Size = new System.Drawing.Size(200, 200);

		// Set the BorderStyle property to none, the BackColor property to   
		// the form's backcolor, and the Scrollable property to false.   
		// This allows the TreeView to blend in form. 

		this.TreeView1.BorderStyle = BorderStyle.None;
		this.TreeView1.BackColor = this.BackColor;
		this.TreeView1.Scrollable = false;

		// Set the HideSelection property to false to keep the  
		// selection highlighted when the user leaves the control.  
		// This helps it blend with form. 
		this.TreeView1.HideSelection = false;

		// Set the ShowRootLines and ShowLines properties to false to  
		// give the TreeView a list-like appearance. 
		this.TreeView1.ShowRootLines = false;
		this.TreeView1.ShowLines = false;

		// Add the nodes. 
		this.TreeView1.Nodes.AddRange(new TreeNode[]
			{new TreeNode("Features", 
				new TreeNode[]{
				new TreeNode("Full Color"), 
				new TreeNode("Project Wizards"), 
				new TreeNode("Visual C# and Visual Basic Support")}), 
				new TreeNode("System Requirements", 
				new TreeNode[]{
					new TreeNode("Pentium 133 MHz or faster processor "),
					new TreeNode("Windows 98 or later"), 
					new TreeNode("100 MB Disk space")})

		// Set the tab index and add the TreeView to the form. 
		this.TreeView1.TabIndex = 0;

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0