TreeNode.PrevVisibleNode Propiedad

Definición

Obtiene el anterior nodo de árbol visible.Gets the previous visible tree node.

public:
 property System::Windows::Forms::TreeNode ^ PrevVisibleNode { System::Windows::Forms::TreeNode ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.TreeNode PrevVisibleNode { get; }
public System.Windows.Forms.TreeNode PrevVisibleNode { get; }
member this.PrevVisibleNode : System.Windows.Forms.TreeNode
Public ReadOnly Property PrevVisibleNode As TreeNode

Valor de propiedad

TreeNode que representa el anterior nodo de árbol visible.A TreeNode that represents the previous visible tree node.

Atributos

Ejemplos

En el ejemplo de código siguiente se selecciona el TreeNode adecuado después de determinar si la TreeNode pasada está seleccionada y qué TreeNode seleccionar.The following code example selects the appropriate TreeNode after determining if the TreeNode passed in is selected and which TreeNode to select. Este ejemplo requiere que tenga un Form con un control TreeView que tenga un TreeNodeCollection que contenga varios objetos TreeNode.This example requires that you have a Form with a TreeView control that has a TreeNodeCollection that contains several TreeNode objects. También requiere que tenga un ComboBox con los siguientes elementos: "PREVIOUS", "PreviousVisible", "Next", "NextVisible", "First" y "Last".It also requires that you have a ComboBox with the following items: "Previous", "PreviousVisible", "Next", "NextVisible", "First", and "Last".

void SelectNode( TreeNode^ node )
{
   if ( node->IsSelected )
   {
      
      // Determine which TreeNode to select.
      String^ str = myComboBox->Text;
      if ( str->Equals( "Previous" ) )
               node->TreeView->SelectedNode = node->PrevNode;
      else
      if ( str->Equals( "PreviousVisible" ) )
               node->TreeView->SelectedNode = node->PrevVisibleNode;
      else
      if ( str->Equals( "Next" ) )
               node->TreeView->SelectedNode = node->NextNode;
      else
      if ( str->Equals( "NextVisible" ) )
               node->TreeView->SelectedNode = node->NextVisibleNode;
      else
      if ( str->Equals( "First" ) )
               node->TreeView->SelectedNode = node->FirstNode;
      else
      if ( str->Equals( "Last" ) )
               node->TreeView->SelectedNode = node->LastNode;
   }

   node->TreeView->Focus();
}
private void SelectNode(TreeNode node)
{
    if(node.IsSelected)
    {
        // Determine which TreeNode to select.
        switch(myComboBox.Text)
        {
            case "Previous":
                node.TreeView.SelectedNode = node.PrevNode;
                break;
            case "PreviousVisible":
                node.TreeView.SelectedNode = node.PrevVisibleNode;
                break;
            case "Next":
                node.TreeView.SelectedNode = node.NextNode;
                break;
            case "NextVisible":
                node.TreeView.SelectedNode = node.NextVisibleNode;
                break;
            case "First":
                node.TreeView.SelectedNode = node.FirstNode;
                break;
            case "Last":
                node.TreeView.SelectedNode = node.LastNode;
                break;
        }
    }
    node.TreeView.Focus();
}
Private Sub SelectNode(node As TreeNode)
   If node.IsSelected Then
      ' Determine which TreeNode to select.
      Select Case myComboBox.Text
         Case "Previous"
            node.TreeView.SelectedNode = node.PrevNode
         Case "PreviousVisible"
            node.TreeView.SelectedNode = node.PrevVisibleNode
         Case "Next"
            node.TreeView.SelectedNode = node.NextNode
         Case "NextVisible"
            node.TreeView.SelectedNode = node.NextVisibleNode
         Case "First"
            node.TreeView.SelectedNode = node.FirstNode
         Case "Last"
            node.TreeView.SelectedNode = node.LastNode
      End Select
   End If
   node.TreeView.Focus()
End Sub

Comentarios

El PrevVisibleNode puede ser un nodo secundario, relacionado o de árbol de otra bifurcación.The PrevVisibleNode can be a child, sibling, or a tree node from another branch. Si no hay ningún nodo de árbol anterior, la propiedad PrevVisibleNode devuelve null.If there is no previous tree node, the PrevVisibleNode property returns null.

Se aplica a

Consulte también: