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TreeView.Scrollable-Eigenschaft

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Ruft einen Wert ab, der angibt, ob im Strukturansicht-Steuerelement nach Bedarf Bildlaufleisten angezeigt werden, oder legt diesen fest.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in system.windows.forms.dll)

Syntax

'Declaration
Public Property Scrollable As Boolean
'Usage
Dim instance As TreeView
Dim value As Boolean

value = instance.Scrollable

instance.Scrollable = value

public bool Scrollable { get; set; }

public:
property bool Scrollable {
    bool get ();
    void set (bool value);
}

/** @property */
public boolean get_Scrollable ()

/** @property */
public void set_Scrollable (boolean value)

public function get Scrollable () : boolean

public function set Scrollable (value : boolean)

Eigenschaftenwert

true, wenn im Strukturansicht-Steuerelement bei Bedarf Bildlaufleisten angezeigt werden, andernfalls false. Der Standardwert ist true.

Hinweise

Wenn diese Eigenschaft auf true festgelegt wird, werden in der TreeView Bildlaufleisten angezeigt, sobald sich eine TreeNode außerhalb des Clientbereichs des Steuerelements befindet.

Hinweis

Wenn die Scrollable-Eigenschaft zur Laufzeit festgelegt wird, wird das TreeView-Handle neu erstellt (siehe Control.RecreateHandle), um die Darstellung des Steuerelements zu aktualisieren. Dadurch werden alle Strukturknoten mit Ausnahme des ausgewählten TreeNode reduziert.

Beispiel

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.
Friend WithEvents TreeView1 As System.Windows.Forms.TreeView

' Initialize the TreeView to blend with the form, giving it the 
' same color as the form and no border.
Private Sub InitializeTreeView()

    ' Create a new TreeView control and set the location and size.
    Me.TreeView1 = New System.Windows.Forms.TreeView
    Me.TreeView1.Location = New System.Drawing.Point(72, 48)
    Me.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.
    Me.TreeView1.BorderStyle = BorderStyle.None
    Me.TreeView1.BackColor = Me.BackColor
    Me.TreeView1.Scrollable = False

    
    ' Set the ShowRootLines and ShowLines properties to false to 
    ' give the TreeView a list-like appearance.
    Me.TreeView1.ShowRootLines = False
    Me.TreeView1.ShowLines = False

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

    ' Set the tab index and add the TreeView to the form.
    Me.TreeView1.TabIndex = 0
    Me.Controls.Add(Me.TreeView1)
End Sub

// 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

Plattformen

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

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

TreeView-Klasse
TreeView-Member
System.Windows.Forms-Namespace