TreeNode.PrevVisibleNode Propriedade

public:
 property System::Windows::Forms::TreeNode ^ PrevVisibleNode { System::Windows::Forms::TreeNode ^ get(); };

public System.Windows.Forms.TreeNode PrevVisibleNode { get; }

[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.TreeNode PrevVisibleNode { get; }

[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.TreeNode? PrevVisibleNode { get; }

member this.PrevVisibleNode : System.Windows.Forms.TreeNode

[<System.ComponentModel.Browsable(false)>]
member this.PrevVisibleNode : System.Windows.Forms.TreeNode

Public ReadOnly Property PrevVisibleNode As TreeNode

Valor da propriedade

Um TreeNode que representa o nó de árvore visível anterior.

Atributos

BrowsableAttribute

Exemplos

O exemplo de código a seguir seleciona o apropriado TreeNode depois de determinar se o TreeNode passado está selecionado e qual TreeNode selecionar. Este exemplo exige que você tenha um Form com um TreeView controle que tenha um TreeNodeCollection que contenha vários TreeNode objetos. Ele também exige que você tenha um ComboBox com os seguintes itens: "Anterior", "PreviousVisible", "Next", "NextVisible", "First" e "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

Comentários

O PrevVisibleNode pode ser um filho, um irmão ou um nó de árvore de outro branch. Se não houver nenhum nó de árvore anterior, a PrevVisibleNode propriedade retornará null.

Aplica-se a

Confira também

• NextVisibleNode
• IsVisible