TreeView.Scrollable TreeView.Scrollable TreeView.Scrollable TreeView.Scrollable Property

Definición

Obtiene o establece un valor que indica si el control de vista de árbol mostrará barras de desplazamiento cuando sean necesarias.Gets or sets a value indicating whether the tree view control displays scroll bars when they are needed.

public:
 property bool Scrollable { bool get(); void set(bool value); };
public bool Scrollable { get; set; }
member this.Scrollable : bool with get, set
Public Property Scrollable As Boolean

Valor de propiedad

Es true si el control de vista de árbol mostrará barras de desplazamiento cuando sean necesarias; en caso contrario, es false.true if the tree view control displays scroll bars when they are needed; otherwise, false. De manera predeterminada, es true.The default is true.

Ejemplos

En el ejemplo de código siguiente se muestra cómo usar el BorderStyle enumeración y el BorderStyle, ShowLines, Scrollable, HideSelection y ShowRootLines propiedades.The following code example demonstrates how to use the BorderStyle enumeration and the BorderStyle, ShowLines, Scrollable, HideSelection and ShowRootLines properties. Para ejecutar este ejemplo, pegue el código siguiente en un formulario y llame a la InitializeTreeView método en el constructor del formulario o Load método.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;

private:
   // Initialize the TreeView to blend with the form, giving it the 
   // same color as the form and no border.
   void InitializeTreeView()
   {
      // Create a new TreeView control and set the location and size.
      this->TreeView1 = gcnew System::Windows::Forms::TreeView;
      this->TreeView1->Location = System::Drawing::Point( 72, 48 );
      this->TreeView1->Size = 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.
      array<TreeNode^>^temp0 = {gcnew TreeNode( "Full Color" ),gcnew TreeNode( "Project Wizards" ),gcnew TreeNode( "Visual C# and Visual Basic Support" )};
      array<TreeNode^>^temp1 = {gcnew TreeNode( "Pentium 133 MHz or faster processor " ),gcnew TreeNode( "Windows 98 or later" ),gcnew TreeNode( "100 MB Disk space" )};
      array<TreeNode^>^temp2 = {gcnew TreeNode( "Features",temp0 ),gcnew TreeNode( "System Requirements",temp1 )};
      this->TreeView1->Nodes->AddRange( temp2 );

      // Set the tab index and add the TreeView to the form.
      this->TreeView1->TabIndex = 0;
      this->Controls->Add( this->TreeView1 );
   }

// 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.
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

Comentarios

Si esta propiedad se establece en true, barras de desplazamiento se muestran en el TreeView cuando alguna TreeNode se encuentra fuera del área de cliente del control.If this property is set to true, scroll bars are displayed on the TreeView when any TreeNode is located outside the control's client region.

Nota

Al establecer el Scrollable propiedad en tiempo de ejecución, el TreeView se vuelve a crear el identificador (consulte Control.RecreateHandle) para actualizar la apariencia del control.When setting the Scrollable property at run time, the TreeView handle is recreated (see Control.RecreateHandle) to update the control's appearance. Esto hace que todos los nodos de árbol contraído, con la excepción seleccionada TreeNode.This causes all tree nodes to be collapsed, with the exception of the selected TreeNode.

Se aplica a