TreeNode Construtores

  • Referência

Definição

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll

Inicializa uma nova instância da classe TreeNode.

Sobrecargas

TreeNode()

Inicializa uma nova instância da classe TreeNode.
TreeNode(String)

Inicializa uma nova instância da classe TreeNode com o texto de rótulo especificado.
TreeNode(SerializationInfo, StreamingContext)

Inicializa uma nova instância da classe TreeNode usando as informações de serialização e o contexto especificados.
TreeNode(String, TreeNode[])

Inicializa uma nova instância da classe TreeNode com o texto do rótulo especificado e os nós da árvore filho.
TreeNode(String, Int32, Int32)

Inicializa uma nova instância da classe TreeNode com o texto do rótulo especificado e imagens a serem exibidas quando o nó de árvore está em um estado selecionado e não selecionado.
TreeNode(String, Int32, Int32, TreeNode[])

Inicializa uma nova instância da classe TreeNode com o texto do rótulo especificado, nós de árvore filho e imagens a serem exibidas quando o nó de árvore está em um estado selecionado e não selecionado.

TreeNode()

Inicializa uma nova instância da classe TreeNode.

public:
 TreeNode();
public TreeNode ();
Public Sub New ()

Exemplos

O exemplo de código a seguir cria um nó de árvore raiz para atribuir nós de árvore filho. Um nó de árvore filho para cada Customer objeto em um ArrayList é adicionado ao nó de árvore raiz, bem como a um nó de árvore filho para cada Order objeto atribuído ao Customer objeto. O Customer objeto é atribuído à Tag propriedade e os nós de árvore que representam Customer objetos são exibidos com Orange texto. Este exemplo exige que você tenha um Customer objeto definido, Order um TreeView controle em um Forme um ArrayList nome customerArray que contenha Customer objetos.

ref class Customer
{
public:
   ArrayList^ CustomerOrders;
   String^ CustomerName;
   Customer( String^ myName )
   {
      CustomerName = myName;
      CustomerOrders = gcnew ArrayList;
   }

};

ref class Order
{
public:
   String^ OrderID;
   Order( String^ myOrderID )
   {
      this->OrderID = myOrderID;
   }

};


   void AddRootNodes()
   {
      
      // Add a root node to assign the customer nodes to.
      TreeNode^ rootNode = gcnew TreeNode;
      rootNode->Text = "CustomerList";
      
      // Add a main root treenode.
      myTreeView->Nodes->Add( rootNode );
      
      // Add a root treenode for each 'Customer' object in the ArrayList.
      IEnumerator^ myEnum = customerArray->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Customer^ myCustomer = safe_cast<Customer^>(myEnum->Current);
         
         // Add a child treenode for each Order object.
         int i = 0;
         array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(5);
         IEnumerator^ myEnum = myCustomer->CustomerOrders->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            Order^ myOrder = safe_cast<Order^>(myEnum->Current);
            myTreeNodeArray[ i ] = gcnew TreeNode( myOrder->OrderID );
            i++;
         }
         TreeNode^ customerNode = gcnew TreeNode( myCustomer->CustomerName,myTreeNodeArray );
         
         // Display the customer names with and Orange font.
         customerNode->ForeColor = Color::Orange;
         
         // Store the Customer Object* in the Tag property of the TreeNode.
         customerNode->Tag = myCustomer;
         myTreeView->Nodes[ 0 ]->Nodes->Add( customerNode );
      }
   }

public class Customer
{
   public ArrayList CustomerOrders;
   public string CustomerName;
   public Customer(string myName)
   {
      CustomerName = myName;
      CustomerOrders = new ArrayList(); 
   }
}
public class Order
{
   public string OrderID;
   public Order(string myOrderID )
   {
      this.OrderID = myOrderID;
   }
}

public void AddRootNodes()
{
   // Add a root node to assign the customer nodes to.
   TreeNode rootNode = new TreeNode();
   rootNode.Text = "CustomerList";
   // Add a main root treenode.
   myTreeView.Nodes.Add(rootNode);

   // Add a root treenode for each 'Customer' object in the ArrayList.
   foreach(Customer myCustomer in customerArray)
   {
      // Add a child treenode for each Order object.
      int i = 0;
      TreeNode[] myTreeNodeArray = new TreeNode[5];
      foreach(Order myOrder in myCustomer.CustomerOrders)
      {
         myTreeNodeArray[i] = new TreeNode(myOrder.OrderID);
         i++;
      }
      TreeNode customerNode = new TreeNode(myCustomer.CustomerName,
        myTreeNodeArray);
        // Display the customer names with and Orange font.
        customerNode.ForeColor = Color.Orange;
        // Store the Customer object in the Tag property of the TreeNode.
        customerNode.Tag = myCustomer;
      myTreeView.Nodes[0].Nodes.Add(customerNode);
   }
}

Public Class Customer
   Public CustomerOrders As ArrayList
   Public CustomerName As String
   Public Sub New(myName As String)
      CustomerName = myName
      CustomerOrders = New ArrayList()
   End Sub
End Class

Public Class Order
   Public OrderID As String
   Public Sub New(myOrderID As String)
      Me.OrderID = myOrderID
   End Sub
End Class

Public Sub AddRootNodes()
   ' Add a root node to assign the customer nodes to.
   Dim rootNode As TreeNode
   rootNode = New TreeNode()
   rootNode.Text = "CustomerList"
   ' Add a main root treenode.
   myTreeView.Nodes.Add(rootNode)

   ' Add a root treenode for each Customer object in the ArrayList.
   Dim myCustomer As Customer
   For Each myCustomer In customerArray
      ' Add a child treenode for each Order object.
      Dim i As Integer = 0
      Dim myTreeNodeArray(4) As TreeNode
      Dim myOrder As Order
      For Each myOrder In  myCustomer.CustomerOrders
         myTreeNodeArray(i) = New TreeNode(myOrder.OrderID)
         i += 1
      Next myOrder
      Dim customerNode As New TreeNode(myCustomer.CustomerName, _
        myTreeNodeArray)
      ' Display the customer names with and Orange font.
      customerNode.ForeColor = Color.Orange
      ' Store the Customer object in the Tag property of the TreeNode.
      customerNode.Tag = myCustomer
      myTreeView.Nodes(0).Nodes.Add(customerNode)
   Next myCustomer
End Sub

Confira também

Aplica-se a

TreeNode(String)

Inicializa uma nova instância da classe TreeNode com o texto de rótulo especificado.

public:
 TreeNode(System::String ^ text);
public TreeNode (string text);
new System.Windows.Forms.TreeNode : string -> System.Windows.Forms.TreeNode
Public Sub New (text As String)

Parâmetros

text
String

O rótulo Text do novo nó da árvore.

Exemplos

O exemplo de código a seguir exibe informações do cliente em um TreeView controle. Os nós de árvore raiz exibem nomes de clientes e os nós de árvore filho exibem os números de pedido atribuídos a cada cliente. Neste exemplo, 1.000 clientes são exibidos com 15 pedidos cada. A repinção do TreeView é suprimida usando os métodos e EndUpdate os BeginUpdate métodos, e uma espera Cursor é exibida enquanto os TreeView cria e pinta os TreeNode objetos. Este exemplo exige que você tenha um Customer objeto que possa conter uma coleção de Order objetos. Ele também requer que você tenha criado uma instância de um TreeView controle em um Form.

// The basic Customer class.
ref class Customer: public System::Object
{
private:
   String^ custName;

protected:
   ArrayList^ custOrders;

public:
   Customer( String^ customername )
   {
      custName = "";
      custOrders = gcnew ArrayList;
      this->custName = customername;
   }


   property String^ CustomerName 
   {
      String^ get()
      {
         return this->custName;
      }

      void set( String^ value )
      {
         this->custName = value;
      }

   }

   property ArrayList^ CustomerOrders 
   {
      ArrayList^ get()
      {
         return this->custOrders;
      }

   }

};


// End Customer class
// The basic customer Order class.
ref class Order: public System::Object
{
private:
   String^ ordID;

public:
   Order( String^ orderid )
   {
      ordID = "";
      this->ordID = orderid;
   }


   property String^ OrderID 
   {
      String^ get()
      {
         return this->ordID;
      }

      void set( String^ value )
      {
         this->ordID = value;
      }

   }

};
// End Order class



void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for ( int x = 0; x < 1000; x++ )
   {
      customerArray->Add( gcnew Customer( "Customer " + x ) );
   }
   
   // Add orders to each Customer object in the ArrayList.
   IEnumerator^ myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer1 = safe_cast<Customer^>(myEnum->Current);
      for ( int y = 0; y < 15; y++ )
      {
         customer1->CustomerOrders->Add( gcnew Order( "Order " + y ) );
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   ::Cursor::Current = gcnew System::Windows::Forms::Cursor( "MyWait.cur" );
   
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1->BeginUpdate();
   
   // Clear the TreeView each time the method is called.
   treeView1->Nodes->Clear();
   
   // Add a root TreeNode for each Customer object in the ArrayList.
   myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer2 = safe_cast<Customer^>(myEnum->Current);
      treeView1->Nodes->Add( gcnew TreeNode( customer2->CustomerName ) );
      
      // Add a child treenode for each Order object in the current Customer object.
      IEnumerator^ myEnum = customer2->CustomerOrders->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Order^ order1 = safe_cast<Order^>(myEnum->Current);
         treeView1->Nodes[ customerArray->IndexOf( customer2 ) ]->Nodes->Add( gcnew TreeNode( customer2->CustomerName + "." + order1->OrderID ) );
      }
   }
   
   // Reset the cursor to the default for all controls.
   ::Cursor::Current = Cursors::Default;
   
   // Begin repainting the TreeView.
   treeView1->EndUpdate();
}


// The basic Customer class.
public class Customer : System.Object
{
   private string custName = "";
   protected ArrayList custOrders = new ArrayList();

   public Customer(string customername)
   {
      this.custName = customername;
   }

   public string CustomerName
   {      
      get{return this.custName;}
      set{this.custName = value;}
   }

   public ArrayList CustomerOrders 
   {
      get{return this.custOrders;}
   }
} // End Customer class 

// The basic customer Order class.
public class Order : System.Object
{
   private string ordID = "";

   public Order(string orderid)
   {
      this.ordID = orderid;
   }

   public string OrderID
   {      
      get{return this.ordID;}
      set{this.ordID = value;}
   }
} // End Order class

// Create a new ArrayList to hold the Customer objects.
private ArrayList customerArray = new ArrayList(); 

private void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for(int x=0; x<1000; x++)
   {
      customerArray.Add(new Customer("Customer" + x.ToString()));
   }

   // Add orders to each Customer object in the ArrayList.
   foreach(Customer customer1 in customerArray)
   {
      for(int y=0; y<15; y++)
      {
         customer1.CustomerOrders.Add(new Order("Order" + y.ToString()));    
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = new Cursor("MyWait.cur");
        
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate();

   // Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear();

   // Add a root TreeNode for each Customer object in the ArrayList.
   foreach(Customer customer2 in customerArray)
   {
      treeView1.Nodes.Add(new TreeNode(customer2.CustomerName));
          
      // Add a child treenode for each Order object in the current Customer object.
      foreach(Order order1 in customer2.CustomerOrders)
      {
         treeView1.Nodes[customerArray.IndexOf(customer2)].Nodes.Add(
           new TreeNode(customer2.CustomerName + "." + order1.OrderID));
      }
   }

   // Reset the cursor to the default for all controls.
   Cursor.Current = Cursors.Default;

   // Begin repainting the TreeView.
   treeView1.EndUpdate();
}

Public Class Customer
   Inherits [Object]
   Private custName As String = ""
   Friend custOrders As New ArrayList()

   Public Sub New(ByVal customername As String)
      Me.custName = customername
   End Sub

   Public Property CustomerName() As String
      Get
         Return Me.custName
      End Get
      Set(ByVal Value As String)
         Me.custName = Value
      End Set
   End Property

   Public ReadOnly Property CustomerOrders() As ArrayList
      Get
         Return Me.custOrders
      End Get
   End Property
End Class


Public Class Order
   Inherits [Object]
   Private ordID As String

   Public Sub New(ByVal orderid As String)
      Me.ordID = orderid
   End Sub

   Public Property OrderID() As String
      Get
         Return Me.ordID
      End Get
      Set(ByVal Value As String)
         Me.ordID = Value
      End Set
   End Property
End Class

' Create a new ArrayList to hold the Customer objects.
Private customerArray As New ArrayList()

Private Sub FillMyTreeView()
   ' Add customers to the ArrayList of Customer objects.
   Dim x As Integer
   For x = 0 To 999
      customerArray.Add(New Customer("Customer" + x.ToString()))
   Next x

   ' Add orders to each Customer object in the ArrayList.
   Dim customer1 As Customer
   For Each customer1 In customerArray
      Dim y As Integer
      For y = 0 To 14
         customer1.CustomerOrders.Add(New Order("Order" + y.ToString()))
      Next y
   Next customer1

   ' Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = New Cursor("MyWait.cur")

   ' Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate()

   ' Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear()

   ' Add a root TreeNode for each Customer object in the ArrayList.
   Dim customer2 As Customer
   For Each customer2 In customerArray
      treeView1.Nodes.Add(New TreeNode(customer2.CustomerName))

      ' Add a child TreeNode for each Order object in the current Customer object.
      Dim order1 As Order
      For Each order1 In customer2.CustomerOrders
         treeView1.Nodes(customerArray.IndexOf(customer2)).Nodes.Add( _
    New TreeNode(customer2.CustomerName + "." + order1.OrderID))
      Next order1
   Next customer2

   ' Reset the cursor to the default for all controls.
   Cursor.Current = System.Windows.Forms.Cursors.Default

   ' Begin repainting the TreeView.
   treeView1.EndUpdate()
End Sub

Comentários

O text valor do parâmetro é atribuído à propriedade do nó e se torna o rótulo de Text nó de árvore.

Confira também

Aplica-se a

TreeNode(SerializationInfo, StreamingContext)

Inicializa uma nova instância da classe TreeNode usando as informações de serialização e o contexto especificados.

protected:
 TreeNode(System::Runtime::Serialization::SerializationInfo ^ serializationInfo, System::Runtime::Serialization::StreamingContext context);
protected TreeNode (System.Runtime.Serialization.SerializationInfo serializationInfo, System.Runtime.Serialization.StreamingContext context);
new System.Windows.Forms.TreeNode : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Windows.Forms.TreeNode
Protected Sub New (serializationInfo As SerializationInfo, context As StreamingContext)

Parâmetros

serializationInfo
SerializationInfo

O SerializationInfo que contém os dados para desserializar a classe.

context
StreamingContext

O StreamingContext que contém a origem e o destino do fluxo serializado.

Aplica-se a

TreeNode(String, TreeNode[])

Inicializa uma nova instância da classe TreeNode com o texto do rótulo especificado e os nós da árvore filho.

public:
 TreeNode(System::String ^ text, cli::array <System::Windows::Forms::TreeNode ^> ^ children);
public TreeNode (string text, System.Windows.Forms.TreeNode[] children);
new System.Windows.Forms.TreeNode : string * System.Windows.Forms.TreeNode[] -> System.Windows.Forms.TreeNode
Public Sub New (text As String, children As TreeNode())

Parâmetros

text
String

O rótulo Text do novo nó da árvore.

children
TreeNode[]

Uma matriz de objetos filho TreeNode .

Exemplos

O exemplo de código a seguir cria um nó de árvore raiz para atribuir nós de árvore filho. Um nó de árvore filho para cada Customer objeto em um ArrayList é adicionado ao nó de árvore raiz, bem como a um nó de árvore filho para cada Order objeto atribuído ao Customer objeto. O Customer objeto é atribuído à Tag propriedade e os nós de árvore que representam Customer objetos são exibidos com Orange texto. Este exemplo exige que você tenha um Customer objeto definido, Order um TreeView controle em um Forme um ArrayList nome customerArray que contenha Customer objetos.

ref class Customer
{
public:
   ArrayList^ CustomerOrders;
   String^ CustomerName;
   Customer( String^ myName )
   {
      CustomerName = myName;
      CustomerOrders = gcnew ArrayList;
   }

};

ref class Order
{
public:
   String^ OrderID;
   Order( String^ myOrderID )
   {
      this->OrderID = myOrderID;
   }

};


   void AddRootNodes()
   {
      
      // Add a root node to assign the customer nodes to.
      TreeNode^ rootNode = gcnew TreeNode;
      rootNode->Text = "CustomerList";
      
      // Add a main root treenode.
      myTreeView->Nodes->Add( rootNode );
      
      // Add a root treenode for each 'Customer' object in the ArrayList.
      IEnumerator^ myEnum = customerArray->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Customer^ myCustomer = safe_cast<Customer^>(myEnum->Current);
         
         // Add a child treenode for each Order object.
         int i = 0;
         array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(5);
         IEnumerator^ myEnum = myCustomer->CustomerOrders->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            Order^ myOrder = safe_cast<Order^>(myEnum->Current);
            myTreeNodeArray[ i ] = gcnew TreeNode( myOrder->OrderID );
            i++;
         }
         TreeNode^ customerNode = gcnew TreeNode( myCustomer->CustomerName,myTreeNodeArray );
         
         // Display the customer names with and Orange font.
         customerNode->ForeColor = Color::Orange;
         
         // Store the Customer Object* in the Tag property of the TreeNode.
         customerNode->Tag = myCustomer;
         myTreeView->Nodes[ 0 ]->Nodes->Add( customerNode );
      }
   }

public class Customer
{
   public ArrayList CustomerOrders;
   public string CustomerName;
   public Customer(string myName)
   {
      CustomerName = myName;
      CustomerOrders = new ArrayList(); 
   }
}
public class Order
{
   public string OrderID;
   public Order(string myOrderID )
   {
      this.OrderID = myOrderID;
   }
}

public void AddRootNodes()
{
   // Add a root node to assign the customer nodes to.
   TreeNode rootNode = new TreeNode();
   rootNode.Text = "CustomerList";
   // Add a main root treenode.
   myTreeView.Nodes.Add(rootNode);

   // Add a root treenode for each 'Customer' object in the ArrayList.
   foreach(Customer myCustomer in customerArray)
   {
      // Add a child treenode for each Order object.
      int i = 0;
      TreeNode[] myTreeNodeArray = new TreeNode[5];
      foreach(Order myOrder in myCustomer.CustomerOrders)
      {
         myTreeNodeArray[i] = new TreeNode(myOrder.OrderID);
         i++;
      }
      TreeNode customerNode = new TreeNode(myCustomer.CustomerName,
        myTreeNodeArray);
        // Display the customer names with and Orange font.
        customerNode.ForeColor = Color.Orange;
        // Store the Customer object in the Tag property of the TreeNode.
        customerNode.Tag = myCustomer;
      myTreeView.Nodes[0].Nodes.Add(customerNode);
   }
}

Public Class Customer
   Public CustomerOrders As ArrayList
   Public CustomerName As String
   Public Sub New(myName As String)
      CustomerName = myName
      CustomerOrders = New ArrayList()
   End Sub
End Class

Public Class Order
   Public OrderID As String
   Public Sub New(myOrderID As String)
      Me.OrderID = myOrderID
   End Sub
End Class

Public Sub AddRootNodes()
   ' Add a root node to assign the customer nodes to.
   Dim rootNode As TreeNode
   rootNode = New TreeNode()
   rootNode.Text = "CustomerList"
   ' Add a main root treenode.
   myTreeView.Nodes.Add(rootNode)

   ' Add a root treenode for each Customer object in the ArrayList.
   Dim myCustomer As Customer
   For Each myCustomer In customerArray
      ' Add a child treenode for each Order object.
      Dim i As Integer = 0
      Dim myTreeNodeArray(4) As TreeNode
      Dim myOrder As Order
      For Each myOrder In  myCustomer.CustomerOrders
         myTreeNodeArray(i) = New TreeNode(myOrder.OrderID)
         i += 1
      Next myOrder
      Dim customerNode As New TreeNode(myCustomer.CustomerName, _
        myTreeNodeArray)
      ' Display the customer names with and Orange font.
      customerNode.ForeColor = Color.Orange
      ' Store the Customer object in the Tag property of the TreeNode.
      customerNode.Tag = myCustomer
      myTreeView.Nodes(0).Nodes.Add(customerNode)
   Next myCustomer
End Sub

Comentários

O text valor do parâmetro é atribuído à propriedade do nó e se torna o rótulo de Text nó de árvore. Os nós de árvore contidos na children matriz são adicionados ao TreeNodeCollection armazenado na Nodes propriedade.

Confira também

Aplica-se a

TreeNode(String, Int32, Int32)

Inicializa uma nova instância da classe TreeNode com o texto do rótulo especificado e imagens a serem exibidas quando o nó de árvore está em um estado selecionado e não selecionado.

public:
 TreeNode(System::String ^ text, int imageIndex, int selectedImageIndex);
public TreeNode (string text, int imageIndex, int selectedImageIndex);
new System.Windows.Forms.TreeNode : string * int * int -> System.Windows.Forms.TreeNode
Public Sub New (text As String, imageIndex As Integer, selectedImageIndex As Integer)

Parâmetros

text
String

O rótulo Text do novo nó da árvore.

imageIndex
Int32

O valor de índice Image a exibir quando o nó de árvore está desmarcado.

selectedImageIndex
Int32

O valor de índice Image a exibir quando o nó de árvore não está selecionado.

Exemplos

O exemplo de código a seguir cria e atribui um ImageList a um TreeView controle e preenche o TreeView controle com TreeNode objetos. Os nós de árvore recebem imagens do ImageList que é exibido quando o nó de árvore está em um estado selecionado ou não selecionado. Este exemplo exige que você tenha um Form que contenha um TreeViewe um ArrayList que contém Customer objetos que contêm Order objetos. Ele também requer que os objetos e os Customer Order objetos sejam definidos.

ref class Customer
{
public:
   ArrayList^ CustomerOrders;
   String^ CustomerName;
   Customer( String^ myName )
   {
      CustomerName = myName;
      CustomerOrders = gcnew ArrayList;
   }

};

ref class Order
{
public:
   String^ OrderID;
   Order( String^ myOrderID )
   {
      this->OrderID = myOrderID;
   }

};

   void FillTreeView()
   {
      
      // Load the images in an ImageList.
      ImageList^ myImageList = gcnew ImageList;
      myImageList->Images->Add( Image::FromFile( "Default.gif" ) );
      myImageList->Images->Add( Image::FromFile( "SelectedDefault.gif" ) );
      myImageList->Images->Add( Image::FromFile( "Root.gif" ) );
      myImageList->Images->Add( Image::FromFile( "UnselectedCustomer.gif" ) );
      myImageList->Images->Add( Image::FromFile( "SelectedCustomer.gif" ) );
      myImageList->Images->Add( Image::FromFile( "UnselectedOrder.gif" ) );
      myImageList->Images->Add( Image::FromFile( "SelectedOrder.gif" ) );
      
      // Assign the ImageList to the TreeView.
      myTreeView->ImageList = myImageList;
      
      // Set the TreeView control's default image and selected image indexes.
      myTreeView->ImageIndex = 0;
      myTreeView->SelectedImageIndex = 1;
      
      /* Set the index of image from the
        ImageList for selected and unselected tree nodes.*/
      this->rootImageIndex = 2;
      this->selectedCustomerImageIndex = 3;
      this->unselectedCustomerImageIndex = 4;
      this->selectedOrderImageIndex = 5;
      this->unselectedOrderImageIndex = 6;
      
      // Create the root tree node.
      TreeNode^ rootNode = gcnew TreeNode( "CustomerList" );
      rootNode->ImageIndex = rootImageIndex;
      rootNode->SelectedImageIndex = rootImageIndex;
      
      // Add a main root tree node.
      myTreeView->Nodes->Add( rootNode );
      
      // Add a root tree node for each Customer object in the ArrayList.
      IEnumerator^ myEnum = customerArray->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Customer^ myCustomer = safe_cast<Customer^>(myEnum->Current);
         
         // Add a child tree node for each Order object.
         int countIndex = 0;
         array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(myCustomer->CustomerOrders->Count);
         IEnumerator^ myEnum = myCustomer->CustomerOrders->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            Order^ myOrder = safe_cast<Order^>(myEnum->Current);
            
            // Add the Order tree node to the array.
            myTreeNodeArray[ countIndex ] = gcnew TreeNode( myOrder->OrderID,unselectedOrderImageIndex,selectedOrderImageIndex );
            countIndex++;
         }
         TreeNode^ customerNode = gcnew TreeNode( myCustomer->CustomerName,unselectedCustomerImageIndex,selectedCustomerImageIndex,myTreeNodeArray );
         myTreeView->Nodes[ 0 ]->Nodes->Add( customerNode );
      }
   }


public class Customer
{
   public ArrayList CustomerOrders;
   public string CustomerName;
   public Customer(string myName)
   {
      CustomerName = myName;
      CustomerOrders = new ArrayList(); 
   }
}
public class Order
{
   public string OrderID;
   public Order(string myOrderID )
   {
      this.OrderID = myOrderID;
   }
}

private void FillTreeView()
{
    // Load the images in an ImageList.
    ImageList myImageList = new ImageList();
    myImageList.Images.Add(Image.FromFile("Default.gif"));
    myImageList.Images.Add(Image.FromFile("SelectedDefault.gif"));
    myImageList.Images.Add(Image.FromFile("Root.gif"));
    myImageList.Images.Add(Image.FromFile("UnselectedCustomer.gif"));
    myImageList.Images.Add(Image.FromFile("SelectedCustomer.gif"));
    myImageList.Images.Add(Image.FromFile("UnselectedOrder.gif"));
    myImageList.Images.Add(Image.FromFile("SelectedOrder.gif"));
    
    // Assign the ImageList to the TreeView.
    myTreeView.ImageList = myImageList;
    
    // Set the TreeView control's default image and selected image indexes.
    myTreeView.ImageIndex = 0;
    myTreeView.SelectedImageIndex = 1;

    /* Set the index of image from the 
    ImageList for selected and unselected tree nodes.*/
    this.rootImageIndex = 2;
    this.selectedCustomerImageIndex = 3;
    this.unselectedCustomerImageIndex = 4;
    this.selectedOrderImageIndex = 5;
    this.unselectedOrderImageIndex = 6;
    
    // Create the root tree node.
    TreeNode rootNode = new TreeNode("CustomerList");
    rootNode.ImageIndex = rootImageIndex;
    rootNode.SelectedImageIndex = rootImageIndex;
      
    // Add a main root tree node.
    myTreeView.Nodes.Add(rootNode);

    // Add a root tree node for each Customer object in the ArrayList.
    foreach(Customer myCustomer in customerArray)
    {
        // Add a child tree node for each Order object.
        int countIndex=0;
        TreeNode[] myTreeNodeArray = new TreeNode[myCustomer.CustomerOrders.Count];
        foreach(Order myOrder in myCustomer.CustomerOrders)
        {
            // Add the Order tree node to the array.
            myTreeNodeArray[countIndex] = new TreeNode(myOrder.OrderID,
              unselectedOrderImageIndex, selectedOrderImageIndex);
            countIndex++;
        }
        // Add the Customer tree node.
        TreeNode customerNode = new TreeNode(myCustomer.CustomerName,
            unselectedCustomerImageIndex, selectedCustomerImageIndex, myTreeNodeArray);
        myTreeView.Nodes[0].Nodes.Add(customerNode);
    }
}

Public Class Customer
   Public CustomerOrders As ArrayList
   Public CustomerName As String
   
   Public Sub New(myName As String)
      CustomerName = myName
      CustomerOrders = New ArrayList()
   End Sub
End Class


Public Class Order
   Public OrderID As String
   
   Public Sub New(myOrderID As String)
      Me.OrderID = myOrderID
   End Sub
End Class

Private Sub FillTreeView()
   ' Load the images in an ImageList.
   Dim myImageList As New ImageList()
   myImageList.Images.Add(Image.FromFile("Default.gif"))
   myImageList.Images.Add(Image.FromFile("SelectedDefault.gif"))
   myImageList.Images.Add(Image.FromFile("Root.gif"))
   myImageList.Images.Add(Image.FromFile("UnselectedCustomer.gif"))
   myImageList.Images.Add(Image.FromFile("SelectedCustomer.gif"))
   myImageList.Images.Add(Image.FromFile("UnselectedOrder.gif"))
   myImageList.Images.Add(Image.FromFile("SelectedOrder.gif"))
   
   ' Assign the ImageList to the TreeView.
   myTreeView.ImageList = myImageList
   
   ' Set the TreeView control's default image and selected image indexes.
   myTreeView.ImageIndex = 0
   myTreeView.SelectedImageIndex = 1
   
   ' Set the index of image from the 
   ' ImageList for selected and unselected tree nodes.
   Me.rootImageIndex = 2
   Me.selectedCustomerImageIndex = 3
   Me.unselectedCustomerImageIndex = 4
   Me.selectedOrderImageIndex = 5
   Me.unselectedOrderImageIndex = 6
   
   ' Create the root tree node.
   Dim rootNode As New TreeNode("CustomerList")
   rootNode.ImageIndex = rootImageIndex
   rootNode.SelectedImageIndex = rootImageIndex
   
   ' Add a main root tree node.
   myTreeView.Nodes.Add(rootNode)
   
   ' Add a root tree node for each Customer object in the ArrayList.
   Dim myCustomer As Customer
   For Each myCustomer In  customerArray
      ' Add a child tree node for each Order object.
      Dim countIndex As Integer = 0
      Dim myTreeNodeArray(myCustomer.CustomerOrders.Count) As TreeNode
      Dim myOrder As Order
      For Each myOrder In  myCustomer.CustomerOrders
         ' Add the Order tree node to the array.
         myTreeNodeArray(countIndex) = New TreeNode(myOrder.OrderID, _
            unselectedOrderImageIndex, selectedOrderImageIndex)
         countIndex += 1
      Next myOrder
      ' Add the Customer tree node.
      Dim customerNode As New TreeNode(myCustomer.CustomerName, _
         unselectedCustomerImageIndex, selectedCustomerImageIndex, myTreeNodeArray)
      myTreeView.Nodes(0).Nodes.Add(customerNode)
   Next myCustomer
End Sub

Comentários

O text valor do parâmetro é atribuído à propriedade do nó e se torna o rótulo de Text nó de árvore. Os imageIndex valores e os valores selectedImageIndex são os valores de índice de um Image armazenado na ImageList propriedade atribuída TreeView.ImageList . A imagem referenciada na imageIndex propriedade é exibida quando o nó de árvore não está selecionado. Da mesma forma, a imagem referenciada na selectedImageIndex propriedade é exibida quando o nó de árvore está em um estado selecionado.

Confira também

Aplica-se a

TreeNode(String, Int32, Int32, TreeNode[])

Inicializa uma nova instância da classe TreeNode com o texto do rótulo especificado, nós de árvore filho e imagens a serem exibidas quando o nó de árvore está em um estado selecionado e não selecionado.

public:
 TreeNode(System::String ^ text, int imageIndex, int selectedImageIndex, cli::array <System::Windows::Forms::TreeNode ^> ^ children);
public TreeNode (string text, int imageIndex, int selectedImageIndex, System.Windows.Forms.TreeNode[] children);
new System.Windows.Forms.TreeNode : string * int * int * System.Windows.Forms.TreeNode[] -> System.Windows.Forms.TreeNode
Public Sub New (text As String, imageIndex As Integer, selectedImageIndex As Integer, children As TreeNode())

Parâmetros

text
String

O rótulo Text do novo nó da árvore.

imageIndex
Int32

O valor de índice Image a exibir quando o nó de árvore está desmarcado.

selectedImageIndex
Int32

O valor de índice Image a exibir quando o nó de árvore não está selecionado.

children
TreeNode[]

Uma matriz de objetos filho TreeNode .

Exemplos

O exemplo de código a seguir cria e atribui um ImageList a um TreeView controle e preenche o TreeView controle com TreeNode objetos. Os nós de árvore recebem imagens do ImageList que é exibido quando o nó de árvore está em um estado selecionado ou não selecionado. Este exemplo exige que você tenha um Form que contenha um TreeViewe um ArrayList que contém Customer objetos que contêm Order objetos. Ele também requer que os objetos e os Customer Order objetos sejam definidos.

ref class Customer
{
public:
   ArrayList^ CustomerOrders;
   String^ CustomerName;
   Customer( String^ myName )
   {
      CustomerName = myName;
      CustomerOrders = gcnew ArrayList;
   }

};

ref class Order
{
public:
   String^ OrderID;
   Order( String^ myOrderID )
   {
      this->OrderID = myOrderID;
   }

};

   void FillTreeView()
   {
      
      // Load the images in an ImageList.
      ImageList^ myImageList = gcnew ImageList;
      myImageList->Images->Add( Image::FromFile( "Default.gif" ) );
      myImageList->Images->Add( Image::FromFile( "SelectedDefault.gif" ) );
      myImageList->Images->Add( Image::FromFile( "Root.gif" ) );
      myImageList->Images->Add( Image::FromFile( "UnselectedCustomer.gif" ) );
      myImageList->Images->Add( Image::FromFile( "SelectedCustomer.gif" ) );
      myImageList->Images->Add( Image::FromFile( "UnselectedOrder.gif" ) );
      myImageList->Images->Add( Image::FromFile( "SelectedOrder.gif" ) );
      
      // Assign the ImageList to the TreeView.
      myTreeView->ImageList = myImageList;
      
      // Set the TreeView control's default image and selected image indexes.
      myTreeView->ImageIndex = 0;
      myTreeView->SelectedImageIndex = 1;
      
      /* Set the index of image from the
        ImageList for selected and unselected tree nodes.*/
      this->rootImageIndex = 2;
      this->selectedCustomerImageIndex = 3;
      this->unselectedCustomerImageIndex = 4;
      this->selectedOrderImageIndex = 5;
      this->unselectedOrderImageIndex = 6;
      
      // Create the root tree node.
      TreeNode^ rootNode = gcnew TreeNode( "CustomerList" );
      rootNode->ImageIndex = rootImageIndex;
      rootNode->SelectedImageIndex = rootImageIndex;
      
      // Add a main root tree node.
      myTreeView->Nodes->Add( rootNode );
      
      // Add a root tree node for each Customer object in the ArrayList.
      IEnumerator^ myEnum = customerArray->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Customer^ myCustomer = safe_cast<Customer^>(myEnum->Current);
         
         // Add a child tree node for each Order object.
         int countIndex = 0;
         array<TreeNode^>^myTreeNodeArray = gcnew array<TreeNode^>(myCustomer->CustomerOrders->Count);
         IEnumerator^ myEnum = myCustomer->CustomerOrders->GetEnumerator();
         while ( myEnum->MoveNext() )
         {
            Order^ myOrder = safe_cast<Order^>(myEnum->Current);
            
            // Add the Order tree node to the array.
            myTreeNodeArray[ countIndex ] = gcnew TreeNode( myOrder->OrderID,unselectedOrderImageIndex,selectedOrderImageIndex );
            countIndex++;
         }
         TreeNode^ customerNode = gcnew TreeNode( myCustomer->CustomerName,unselectedCustomerImageIndex,selectedCustomerImageIndex,myTreeNodeArray );
         myTreeView->Nodes[ 0 ]->Nodes->Add( customerNode );
      }
   }


public class Customer
{
   public ArrayList CustomerOrders;
   public string CustomerName;
   public Customer(string myName)
   {
      CustomerName = myName;
      CustomerOrders = new ArrayList(); 
   }
}
public class Order
{
   public string OrderID;
   public Order(string myOrderID )
   {
      this.OrderID = myOrderID;
   }
}

private void FillTreeView()
{
    // Load the images in an ImageList.
    ImageList myImageList = new ImageList();
    myImageList.Images.Add(Image.FromFile("Default.gif"));
    myImageList.Images.Add(Image.FromFile("SelectedDefault.gif"));
    myImageList.Images.Add(Image.FromFile("Root.gif"));
    myImageList.Images.Add(Image.FromFile("UnselectedCustomer.gif"));
    myImageList.Images.Add(Image.FromFile("SelectedCustomer.gif"));
    myImageList.Images.Add(Image.FromFile("UnselectedOrder.gif"));
    myImageList.Images.Add(Image.FromFile("SelectedOrder.gif"));
    
    // Assign the ImageList to the TreeView.
    myTreeView.ImageList = myImageList;
    
    // Set the TreeView control's default image and selected image indexes.
    myTreeView.ImageIndex = 0;
    myTreeView.SelectedImageIndex = 1;

    /* Set the index of image from the 
    ImageList for selected and unselected tree nodes.*/
    this.rootImageIndex = 2;
    this.selectedCustomerImageIndex = 3;
    this.unselectedCustomerImageIndex = 4;
    this.selectedOrderImageIndex = 5;
    this.unselectedOrderImageIndex = 6;
    
    // Create the root tree node.
    TreeNode rootNode = new TreeNode("CustomerList");
    rootNode.ImageIndex = rootImageIndex;
    rootNode.SelectedImageIndex = rootImageIndex;
      
    // Add a main root tree node.
    myTreeView.Nodes.Add(rootNode);

    // Add a root tree node for each Customer object in the ArrayList.
    foreach(Customer myCustomer in customerArray)
    {
        // Add a child tree node for each Order object.
        int countIndex=0;
        TreeNode[] myTreeNodeArray = new TreeNode[myCustomer.CustomerOrders.Count];
        foreach(Order myOrder in myCustomer.CustomerOrders)
        {
            // Add the Order tree node to the array.
            myTreeNodeArray[countIndex] = new TreeNode(myOrder.OrderID,
              unselectedOrderImageIndex, selectedOrderImageIndex);
            countIndex++;
        }
        // Add the Customer tree node.
        TreeNode customerNode = new TreeNode(myCustomer.CustomerName,
            unselectedCustomerImageIndex, selectedCustomerImageIndex, myTreeNodeArray);
        myTreeView.Nodes[0].Nodes.Add(customerNode);
    }
}

Public Class Customer
   Public CustomerOrders As ArrayList
   Public CustomerName As String
   
   Public Sub New(myName As String)
      CustomerName = myName
      CustomerOrders = New ArrayList()
   End Sub
End Class


Public Class Order
   Public OrderID As String
   
   Public Sub New(myOrderID As String)
      Me.OrderID = myOrderID
   End Sub
End Class

Private Sub FillTreeView()
   ' Load the images in an ImageList.
   Dim myImageList As New ImageList()
   myImageList.Images.Add(Image.FromFile("Default.gif"))
   myImageList.Images.Add(Image.FromFile("SelectedDefault.gif"))
   myImageList.Images.Add(Image.FromFile("Root.gif"))
   myImageList.Images.Add(Image.FromFile("UnselectedCustomer.gif"))
   myImageList.Images.Add(Image.FromFile("SelectedCustomer.gif"))
   myImageList.Images.Add(Image.FromFile("UnselectedOrder.gif"))
   myImageList.Images.Add(Image.FromFile("SelectedOrder.gif"))
   
   ' Assign the ImageList to the TreeView.
   myTreeView.ImageList = myImageList
   
   ' Set the TreeView control's default image and selected image indexes.
   myTreeView.ImageIndex = 0
   myTreeView.SelectedImageIndex = 1
   
   ' Set the index of image from the 
   ' ImageList for selected and unselected tree nodes.
   Me.rootImageIndex = 2
   Me.selectedCustomerImageIndex = 3
   Me.unselectedCustomerImageIndex = 4
   Me.selectedOrderImageIndex = 5
   Me.unselectedOrderImageIndex = 6
   
   ' Create the root tree node.
   Dim rootNode As New TreeNode("CustomerList")
   rootNode.ImageIndex = rootImageIndex
   rootNode.SelectedImageIndex = rootImageIndex
   
   ' Add a main root tree node.
   myTreeView.Nodes.Add(rootNode)
   
   ' Add a root tree node for each Customer object in the ArrayList.
   Dim myCustomer As Customer
   For Each myCustomer In  customerArray
      ' Add a child tree node for each Order object.
      Dim countIndex As Integer = 0
      Dim myTreeNodeArray(myCustomer.CustomerOrders.Count) As TreeNode
      Dim myOrder As Order
      For Each myOrder In  myCustomer.CustomerOrders
         ' Add the Order tree node to the array.
         myTreeNodeArray(countIndex) = New TreeNode(myOrder.OrderID, _
            unselectedOrderImageIndex, selectedOrderImageIndex)
         countIndex += 1
      Next myOrder
      ' Add the Customer tree node.
      Dim customerNode As New TreeNode(myCustomer.CustomerName, _
         unselectedCustomerImageIndex, selectedCustomerImageIndex, myTreeNodeArray)
      myTreeView.Nodes(0).Nodes.Add(customerNode)
   Next myCustomer
End Sub

Comentários

O text valor do parâmetro é atribuído à propriedade do nó e se torna o rótulo de Text nó de árvore. Os imageIndex valores e os valores selectedImageIndex são os valores de índice de um Image armazenado na ImageList propriedade atribuída TreeView.ImageList . A imagem referenciada no imageIndex parâmetro é exibida quando o nó de árvore não é selecionado. Da mesma forma, a imagem referenciada no selectedImageIndex parâmetro é exibida quando o nó de árvore está em um estado selecionado. Os nós de árvore contidos na children matriz são adicionados ao TreeNodeCollection armazenado na Nodes propriedade.

Confira também

Aplica-se a