TreeView.SelectedNode TreeView.SelectedNode TreeView.SelectedNode TreeView.SelectedNode Property

Definición

Obtiene o establece el nodo de árbol seleccionado actualmente en el control de vista de árbol.Gets or sets the tree node that is currently selected in the tree view control.

public:
 property System::Windows::Forms::TreeNode ^ SelectedNode { System::Windows::Forms::TreeNode ^ get(); void set(System::Windows::Forms::TreeNode ^ value); };
[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.TreeNode SelectedNode { get; set; }
member this.SelectedNode : System.Windows.Forms.TreeNode with get, set
Public Property SelectedNode As TreeNode

Valor de propiedad

TreeNode seleccionado actualmente en el control de vista de árbol.The TreeNode that is currently selected in the tree view control.

Ejemplos

En el ejemplo de código siguiente PathSeparator se establece la TreeView propiedad de un y se muestra el número de nodos de árbol secundarios TreeNodeCollection SelectedNodecontenidos en de.The following code example sets the PathSeparator property of a TreeView and displays the number of child tree nodes that is contained in the TreeNodeCollection of the SelectedNode. También se muestra el porcentaje del nodo de árbol secundario para el total de nodos de árbol en el control de vista de árbol.The percentage of child tree node to total tree nodes in the tree view control is also displayed. Este ejemplo requiere que Form tenga un Buttoncon y un TreeView control con un TreeNodeCollection que tenga varios TreeNode objetos (preferiblemente con tres o más niveles).This example requires that you have a Form with a Button, and a TreeView control with a TreeNodeCollection that has several TreeNode objects (preferably with three or more levels).

void myButton_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{

   // Set the tree view's PathSeparator property.
   myTreeView->PathSeparator = ".";

   // Get the count of the child tree nodes contained in the SelectedNode.
   int myNodeCount = myTreeView->SelectedNode->GetNodeCount( true );
   Decimal myChildPercentage = ((Decimal)myNodeCount / (Decimal)myTreeView->GetNodeCount( true )) * 100;

   // Display the tree node path and the number of child nodes it and the tree view have.
   MessageBox::Show( String::Concat( "The '", myTreeView->SelectedNode->FullPath, "' node has ", myNodeCount, " child nodes.\nThat is ", String::Format( "{0:###.##}", myChildPercentage ), "% of the total tree nodes in the tree view control." ) );
}
private void myButton_Click(object sender, System.EventArgs e)
{
   // Set the tree view's PathSeparator property.
   myTreeView.PathSeparator = ".";

   // Get the count of the child tree nodes contained in the SelectedNode.
   int myNodeCount = myTreeView.SelectedNode.GetNodeCount(true);
   decimal myChildPercentage = ((decimal)myNodeCount/
     (decimal)myTreeView.GetNodeCount(true)) * 100;

   // Display the tree node path and the number of child nodes it and the tree view have.
   MessageBox.Show("The '" + myTreeView.SelectedNode.FullPath + "' node has "
     + myNodeCount.ToString() + " child nodes.\nThat is "
     + string.Format("{0:###.##}", myChildPercentage)
     + "% of the total tree nodes in the tree view control.");
}
Private Sub myButton_Click(ByVal sender As Object, _
  ByVal e As System.EventArgs) Handles myButton.Click
   ' Set the tree view's PathSeparator property.
   myTreeView.PathSeparator = "."

   ' Get the count of the child tree nodes contained in the SelectedNode.
   Dim myNodeCount As Integer = myTreeView.SelectedNode.GetNodeCount(True)
   Dim myChildPercentage As Decimal = CDec(myNodeCount) / _
      CDec(myTreeView.GetNodeCount(True)) * 100

   ' Display the tree node path and the number of child nodes it and the tree view have.
   MessageBox.Show(("The '" + myTreeView.SelectedNode.FullPath + "' node has " _
      + myNodeCount.ToString() + " child nodes." + Microsoft.VisualBasic.ControlChars.Lf _
      + "That is " + String.Format("{0:###.##}", myChildPercentage) _
      + "% of the total tree nodes in the tree view control."))
End Sub

Comentarios

Si no TreeNode está seleccionado actualmente, la SelectedNode propiedad es null.If no TreeNode is currently selected, the SelectedNode property is null.

Al establecer esta propiedad, el nodo especificado se desplaza en la vista y todos los nodos primarios se expanden para que el nodo especificado esté visible.When you set this property, the specified node is scrolled into view and any parent nodes are expanded so that the specified node is visible.

Cuando el nodo primario o cualquier nodo antecesor del nodo seleccionado se contrae mediante programación o a través de la acción del usuario, el nodo contraído se convierte en el nodo seleccionado.When the parent node or any ancestor node of the selected node is collapsed either programmatically or through user action, the collapsed node becomes the selected node.

Se aplica a

Consulte también: