TreeView.GetNodeCount(Boolean) Metode

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

TreeView.cs

Mengambil jumlah simpul pohon, secara opsional termasuk yang ada di semua subtree, yang ditetapkan ke kontrol tampilan pohon.

public:
 int GetNodeCount(bool includeSubTrees);

public int GetNodeCount(bool includeSubTrees);

member this.GetNodeCount : bool -> int

Public Function GetNodeCount (includeSubTrees As Boolean) As Integer

Parameter

includeSubTrees

Boolean

true untuk menghitung TreeNode item yang dimuat subtrees; jika tidak, false.

Mengembalikan

Int32

Jumlah simpul pohon, secara opsional termasuk yang ada di semua subtree, yang ditetapkan ke kontrol tampilan pohon.

Contoh

Contoh kode berikut mengatur PathSeparator properti dan TreeView menampilkan jumlah simpul pohon anak yang terkandung dalam TreeNodeCollection dari SelectedNode. Persentase simpul pohon anak terhadap total simpul pohon dalam kontrol tampilan pohon juga ditampilkan. Contoh ini mengharuskan Anda memiliki Form dengan Button, dan TreeView kontrol dengan TreeNodeCollection yang memiliki beberapa TreeNode objek (sebaiknya dengan tiga tingkat atau lebih).

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

Keterangan

Jika includeSubTrees adalah true, hasilnya adalah jumlah semua simpul pohon di seluruh struktur pohon.

Lihat juga

• TreeNode