TreeNode Construtores

Referência

Definição

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Importante

Algumas informações se referem a produtos de pré-lançamento que podem ser substancialmente modificados antes do lançamento. A Microsoft não oferece garantias, expressas ou implícitas, das informações aqui fornecidas.

Inicializa uma nova instância da classe TreeNode.

Sobrecargas

TreeNode()	Inicializa uma nova instância da classe TreeNode sem um texto ou valor.
TreeNode(String)	Inicializa uma nova instância da classe TreeNode usando o texto especificado.
TreeNode(String, String)	Inicializa uma nova instância da classe TreeNode usando o valor e o texto especificados.
TreeNode(TreeView, Boolean)	Inicializa uma nova instância da classe TreeNode usando o proprietário especificado.
TreeNode(String, String, String)	Inicializa uma nova instância da classe TreeNode usando a URL da imagem, valor e texto especificados.
TreeNode(String, String, String, String, String)	Inicializa uma nova instância da classe TreeNode usando o destino, a URL de navegação, a URL de imagem, o valor e o texto especificados.

TreeNode()

Inicializa uma nova instância da classe TreeNode sem um texto ou valor.

public:
 TreeNode();

public TreeNode ();

Public Sub New ()

Exemplos

O exemplo de código a seguir demonstra como usar esse construtor para adicionar dinamicamente um nó ao TreeView controle.


<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Init(Object sender, EventArgs e)
  {
  
    if(!IsPostBack)
    {

      // Add the first tree to the TreeView control.
      CreateTree("Section 1");

      // Add the second tree to the TreeView control.
      CreateTree("Section 2");
    
    }

  }

  void CreateTree(String NodeText)
  {

    // Create the root node using the default constructor.
    TreeNode root = new TreeNode();
    root.Text = NodeText;

    // Use the ChildNodes property of the root TreeNode to add child nodes.
    // Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(new TreeNode("Topic 1"));

    // Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(new TreeNode("Topic 2", "Value 2"));

    // Create the node using the constructor that takes the text, value, 
    // and imageUrl parameters.
    root.ChildNodes.Add(new TreeNode("Topic 3", "Value 3", "Image1.jpg"));

    // Create the node using the constructor that takes the text, value, 
    // imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(new TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"));

    // Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root);

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>


<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)

    If Not IsPostBack Then

      ' Add the first tree to the TreeView control.
      CreateTree("Section 1")

      ' Add the second tree to the TreeView control.
      CreateTree("Section 2")

    End If

  End Sub

  Sub CreateTree(ByVal NodeText As String)

    ' Create the root node using the default constructor.
    Dim root As TreeNode = New TreeNode
    root.Text = NodeText

    ' Use the ChildNodes property of the root TreeNode to add child nodes.
    ' Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(New TreeNode("Topic 1"))

    ' Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(New TreeNode("Topic 2", "Value 2"))

    ' Create the node using the constructor that takes the text, value, 
    ' and imageUrl parameters.
    root.ChildNodes.Add(New TreeNode("Topic 3", "Value 3", "Image1.jpg"))

    ' Create the node using the constructor that takes the text, value, 
    ' imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(New TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"))

    ' Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root)

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>

Comentários

Use esse construtor para inicializar uma nova instância da TreeNode classe usando os valores padrão.

Observação

Quando esse construtor é usado, todas as propriedades no TreeNode objeto são definidas como seus valores padrão. Certifique-se de definir as propriedades, conforme necessário, depois de criar o objeto.

Confira também

Aplica-se a

TreeNode(String)

Inicializa uma nova instância da classe TreeNode usando o texto especificado.

public:
 TreeNode(System::String ^ text);

public TreeNode (string text);

new System.Web.UI.WebControls.TreeNode : string -> System.Web.UI.WebControls.TreeNode

Public Sub New (text As String)

Parâmetros

text: String

O texto exibido no controle TreeView para o nó.

Exemplos

O exemplo de código a seguir demonstra como usar esse construtor para adicionar dinamicamente um nó ao TreeView controle.


<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Init(Object sender, EventArgs e)
  {
  
    if(!IsPostBack)
    {

      // Add the first tree to the TreeView control.
      CreateTree("Section 1");

      // Add the second tree to the TreeView control.
      CreateTree("Section 2");
    
    }

  }

  void CreateTree(String NodeText)
  {

    // Create the root node using the default constructor.
    TreeNode root = new TreeNode();
    root.Text = NodeText;

    // Use the ChildNodes property of the root TreeNode to add child nodes.
    // Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(new TreeNode("Topic 1"));

    // Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(new TreeNode("Topic 2", "Value 2"));

    // Create the node using the constructor that takes the text, value, 
    // and imageUrl parameters.
    root.ChildNodes.Add(new TreeNode("Topic 3", "Value 3", "Image1.jpg"));

    // Create the node using the constructor that takes the text, value, 
    // imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(new TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"));

    // Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root);

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>


<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)

    If Not IsPostBack Then

      ' Add the first tree to the TreeView control.
      CreateTree("Section 1")

      ' Add the second tree to the TreeView control.
      CreateTree("Section 2")

    End If

  End Sub

  Sub CreateTree(ByVal NodeText As String)

    ' Create the root node using the default constructor.
    Dim root As TreeNode = New TreeNode
    root.Text = NodeText

    ' Use the ChildNodes property of the root TreeNode to add child nodes.
    ' Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(New TreeNode("Topic 1"))

    ' Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(New TreeNode("Topic 2", "Value 2"))

    ' Create the node using the constructor that takes the text, value, 
    ' and imageUrl parameters.
    root.ChildNodes.Add(New TreeNode("Topic 3", "Value 3", "Image1.jpg"))

    ' Create the node using the constructor that takes the text, value, 
    ' imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(New TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"))

    ' Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root)

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>

Comentários

Use esse construtor para inicializar uma nova instância da TreeNode classe usando o texto especificado pelo text parâmetro.

A tabela a seguir mostra o valor da propriedade inicial de uma instância de TreeNode.

Propriedade	Valor inicial
Text	O valor do `text` parâmetro.

Confira também

Aplica-se a

TreeNode(String, String)

Inicializa uma nova instância da classe TreeNode usando o valor e o texto especificados.

public:
 TreeNode(System::String ^ text, System::String ^ value);

public TreeNode (string text, string value);

new System.Web.UI.WebControls.TreeNode : string * string -> System.Web.UI.WebControls.TreeNode

Public Sub New (text As String, value As String)

Parâmetros

text: String

O texto exibido no controle TreeView para o nó.

value: String

Os dados complementares associados ao nó, como dados usados para manipular eventos postback.

Exemplos

O exemplo de código a seguir demonstra como usar esse construtor para adicionar dinamicamente um nó ao TreeView controle.


<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Init(Object sender, EventArgs e)
  {
  
    if(!IsPostBack)
    {

      // Add the first tree to the TreeView control.
      CreateTree("Section 1");

      // Add the second tree to the TreeView control.
      CreateTree("Section 2");
    
    }

  }

  void CreateTree(String NodeText)
  {

    // Create the root node using the default constructor.
    TreeNode root = new TreeNode();
    root.Text = NodeText;

    // Use the ChildNodes property of the root TreeNode to add child nodes.
    // Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(new TreeNode("Topic 1"));

    // Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(new TreeNode("Topic 2", "Value 2"));

    // Create the node using the constructor that takes the text, value, 
    // and imageUrl parameters.
    root.ChildNodes.Add(new TreeNode("Topic 3", "Value 3", "Image1.jpg"));

    // Create the node using the constructor that takes the text, value, 
    // imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(new TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"));

    // Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root);

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>


<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)

    If Not IsPostBack Then

      ' Add the first tree to the TreeView control.
      CreateTree("Section 1")

      ' Add the second tree to the TreeView control.
      CreateTree("Section 2")

    End If

  End Sub

  Sub CreateTree(ByVal NodeText As String)

    ' Create the root node using the default constructor.
    Dim root As TreeNode = New TreeNode
    root.Text = NodeText

    ' Use the ChildNodes property of the root TreeNode to add child nodes.
    ' Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(New TreeNode("Topic 1"))

    ' Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(New TreeNode("Topic 2", "Value 2"))

    ' Create the node using the constructor that takes the text, value, 
    ' and imageUrl parameters.
    root.ChildNodes.Add(New TreeNode("Topic 3", "Value 3", "Image1.jpg"))

    ' Create the node using the constructor that takes the text, value, 
    ' imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(New TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"))

    ' Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root)

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>

Comentários

Use esse construtor para inicializar uma nova instância da TreeNode classe usando o texto e o text valor especificados pelo e value parâmetros, respectivamente.

A tabela a seguir mostra valores de propriedade iniciais para uma instância de TreeNode.

Propriedade	Valor inicial
Text	O valor do `text` parâmetro.
Value	O valor do `value` parâmetro.

Confira também

Aplica-se a

TreeNode(TreeView, Boolean)

Inicializa uma nova instância da classe TreeNode usando o proprietário especificado.

protected public:
 TreeNode(System::Web::UI::WebControls::TreeView ^ owner, bool isRoot);

protected internal TreeNode (System.Web.UI.WebControls.TreeView owner, bool isRoot);

new System.Web.UI.WebControls.TreeNode : System.Web.UI.WebControls.TreeView * bool -> System.Web.UI.WebControls.TreeNode

Protected Friend Sub New (owner As TreeView, isRoot As Boolean)

Parâmetros

owner: TreeView

O TreeView que conterá o novo TreeNode.

isRoot: Boolean

true se o TreeNode for um nó raiz; caso contrário, false.

Confira também

TreeNodeTypes

Aplica-se a

TreeNode(String, String, String)

Inicializa uma nova instância da classe TreeNode usando a URL da imagem, valor e texto especificados.

public:
 TreeNode(System::String ^ text, System::String ^ value, System::String ^ imageUrl);

public TreeNode (string text, string value, string imageUrl);

new System.Web.UI.WebControls.TreeNode : string * string * string -> System.Web.UI.WebControls.TreeNode

Public Sub New (text As String, value As String, imageUrl As String)

Parâmetros

text: String

O texto exibido no controle TreeView para o nó.

value: String

Os dados complementares associados ao nó, como dados usados para manipular eventos postback.

imageUrl: String

A URL para uma imagem exibida ao lado do nó.

Exemplos

O exemplo de código a seguir demonstra como usar esse construtor para adicionar dinamicamente um nó ao TreeView controle.


<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Init(Object sender, EventArgs e)
  {
  
    if(!IsPostBack)
    {

      // Add the first tree to the TreeView control.
      CreateTree("Section 1");

      // Add the second tree to the TreeView control.
      CreateTree("Section 2");
    
    }

  }

  void CreateTree(String NodeText)
  {

    // Create the root node using the default constructor.
    TreeNode root = new TreeNode();
    root.Text = NodeText;

    // Use the ChildNodes property of the root TreeNode to add child nodes.
    // Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(new TreeNode("Topic 1"));

    // Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(new TreeNode("Topic 2", "Value 2"));

    // Create the node using the constructor that takes the text, value, 
    // and imageUrl parameters.
    root.ChildNodes.Add(new TreeNode("Topic 3", "Value 3", "Image1.jpg"));

    // Create the node using the constructor that takes the text, value, 
    // imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(new TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"));

    // Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root);

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>


<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)

    If Not IsPostBack Then

      ' Add the first tree to the TreeView control.
      CreateTree("Section 1")

      ' Add the second tree to the TreeView control.
      CreateTree("Section 2")

    End If

  End Sub

  Sub CreateTree(ByVal NodeText As String)

    ' Create the root node using the default constructor.
    Dim root As TreeNode = New TreeNode
    root.Text = NodeText

    ' Use the ChildNodes property of the root TreeNode to add child nodes.
    ' Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(New TreeNode("Topic 1"))

    ' Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(New TreeNode("Topic 2", "Value 2"))

    ' Create the node using the constructor that takes the text, value, 
    ' and imageUrl parameters.
    root.ChildNodes.Add(New TreeNode("Topic 3", "Value 3", "Image1.jpg"))

    ' Create the node using the constructor that takes the text, value, 
    ' imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(New TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"))

    ' Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root)

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>

Comentários

Use esse construtor para inicializar uma nova instância da TreeNode classe usando o texto, o valor e a textURL de imagem especificados pelo , valuee imageUrl parâmetros, respectivamente.

A tabela a seguir mostra valores de propriedade iniciais para uma instância de TreeNode.

Propriedade	Valor inicial
Text	O valor do `text` parâmetro.
Value	O valor do `value` parâmetro.
ImageUrl	O valor do `imageUrl` parâmetro.

Confira também

Aplica-se a

TreeNode(String, String, String, String, String)

Inicializa uma nova instância da classe TreeNode usando o destino, a URL de navegação, a URL de imagem, o valor e o texto especificados.

public:
 TreeNode(System::String ^ text, System::String ^ value, System::String ^ imageUrl, System::String ^ navigateUrl, System::String ^ target);

public TreeNode (string text, string value, string imageUrl, string navigateUrl, string target);

new System.Web.UI.WebControls.TreeNode : string * string * string * string * string -> System.Web.UI.WebControls.TreeNode

Public Sub New (text As String, value As String, imageUrl As String, navigateUrl As String, target As String)

Parâmetros

text: String

O texto exibido no controle TreeView para o nó.

value: String

Os dados complementares associados ao nó, como dados usados para manipular eventos postback.

imageUrl: String

A URL para uma imagem exibida ao lado do nó.

navigateUrl: String

A URL à qual vincular quando o nó é clicado.

target: String

A janela ou o quadro de destino no qual deverá ser exibido o conteúdo da página da Web vinculada quando um usuário clicar no nó.

Exemplos

O exemplo de código a seguir demonstra como usar esse construtor para adicionar dinamicamente um nó ao TreeView controle.


<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Init(Object sender, EventArgs e)
  {
  
    if(!IsPostBack)
    {

      // Add the first tree to the TreeView control.
      CreateTree("Section 1");

      // Add the second tree to the TreeView control.
      CreateTree("Section 2");
    
    }

  }

  void CreateTree(String NodeText)
  {

    // Create the root node using the default constructor.
    TreeNode root = new TreeNode();
    root.Text = NodeText;

    // Use the ChildNodes property of the root TreeNode to add child nodes.
    // Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(new TreeNode("Topic 1"));

    // Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(new TreeNode("Topic 2", "Value 2"));

    // Create the node using the constructor that takes the text, value, 
    // and imageUrl parameters.
    root.ChildNodes.Add(new TreeNode("Topic 3", "Value 3", "Image1.jpg"));

    // Create the node using the constructor that takes the text, value, 
    // imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(new TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"));

    // Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root);

  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>


<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)

    If Not IsPostBack Then

      ' Add the first tree to the TreeView control.
      CreateTree("Section 1")

      ' Add the second tree to the TreeView control.
      CreateTree("Section 2")

    End If

  End Sub

  Sub CreateTree(ByVal NodeText As String)

    ' Create the root node using the default constructor.
    Dim root As TreeNode = New TreeNode
    root.Text = NodeText

    ' Use the ChildNodes property of the root TreeNode to add child nodes.
    ' Create the node using the constructor that takes the text parameter.
    root.ChildNodes.Add(New TreeNode("Topic 1"))

    ' Create the node using the constructor that takes the text and value parameters.
    root.ChildNodes.Add(New TreeNode("Topic 2", "Value 2"))

    ' Create the node using the constructor that takes the text, value, 
    ' and imageUrl parameters.
    root.ChildNodes.Add(New TreeNode("Topic 3", "Value 3", "Image1.jpg"))

    ' Create the node using the constructor that takes the text, value, 
    ' imageUrl, navigateUrl, and target parameters.
    root.ChildNodes.Add(New TreeNode("Topic 4", "Value 4", "Image1.jpg", "http://www.microsoft.com", "_blank"))

    ' Add the root node to the Nodes collection of the TreeView control.
    DynamicTreeView.Nodes.Add(root)

  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>TreeNode Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>TreeNode Constructor Example</h3>
      
      <asp:TreeView id="DynamicTreeView"
         EnableClientScript="false"
         ExpandDepth="2" 
         runat="server">
        
      </asp:TreeView>

    </form>
  </body>
</html>

Comentários

Use este construtor para inicializar uma nova instância da TreeNode classe usando o texto, o valor, a imagem e as URLs de navegação e o destino de exibição especificado pelo text, value, imageUrle target navigateUrlparâmetros, respectivamente.

A tabela a seguir mostra valores de propriedade inicial para uma instância de TreeNode.

Propriedade	Valor inicial
Text	O valor do `text` parâmetro.
Value	O valor do `value` parâmetro.
ImageUrl	O valor do `imageUrl` parâmetro.
NavigateUrl	O valor do `navigateUrl` parâmetro.
Target	O valor do `target` parâmetro.

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TreeNode Construtores

Definição

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TreeNode()

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TreeNode(String)

Parâmetros

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TreeNode(String, String)

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TreeNode(TreeView, Boolean)

Parâmetros

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TreeNode(String, String, String)

Parâmetros

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TreeNode(String, String, String, String, String)

Parâmetros

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