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TreeView.ShowRootLines-Eigenschaft

Aktualisiert: November 2007

Ruft einen Wert ab, der angibt, ob im Strukturansicht-Steuerelement Linien zwischen Stammknoten der Strukturansicht gezeichnet werden, oder legt diesen fest.

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

public bool ShowRootLines { get; set; }
/** @property */
public boolean get_ShowRootLines()
/** @property */
public  void set_ShowRootLines(boolean value)

public function get ShowRootLines () : boolean
public function set ShowRootLines (value : boolean)

Eigenschaftenwert

Typ: System.Boolean
true, wenn Linien zwischen Stammknoten der Strukturansicht gezeichnet werden, andernfalls false. Der Standardwert ist true.

Wenn die ShowRootLines-Eigenschaft false ist, werden neben den Stammknoten keine Schaltflächen mit Pluszeichen und Minuszeichen angezeigt, sodass die ShowPlusMinus-Eigenschaft keine Auswirkungen hat.

Im folgenden Codebeispiel wird die Verwendung der BorderStyle-Enumeration und der Eigenschaften BorderStyle, ShowLines, Scrollable, HideSelection und ShowRootLines veranschaulicht. Fügen Sie folgenden Code in ein Formular ein, um dieses Beispiel auszuführen, und rufen Sie die InitializeTreeView-Methode im Konstruktor des Formulars oder die Load-Methode auf.


	// 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;
		this.Controls.Add(this.TreeView1);
	}


// Declare the TreeView control.
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.set_Location(new System.Drawing.Point(72, 48));
    this.treeView1.set_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.set_BorderStyle(BorderStyle.None);
    this.treeView1.set_BackColor(this.get_BackColor());
    this.treeView1.set_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.set_HideSelection(false);
    // Set the ShowRootLines and ShowLines properties to false to 
    // give the TreeView a list-like appearance.
    this.treeView1.set_ShowRootLines(false);
    this.treeView1.set_ShowLines(false);
    // Add the nodes.
    this.treeView1.get_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.set_TabIndex(0);
    this.get_Controls().Add(this.treeView1);
} //InitializeTreeView


Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile für Smartphone, Windows Mobile für Pocket PC

.NET Framework und .NET Compact Framework unterstützen nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen für .NET Framework.

.NET Framework

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

.NET Compact Framework

Unterstützt in: 3.5, 2.0, 1.0
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