TreeNode Construtores

Definição

Espaço de Nomes:: System.Web.UI.WebControls

Assemblagem:: System.Web.dll

Importante

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Inicializa uma nova instância da TreeNode classe.

Sobrecargas

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

TreeNode()

Inicializa uma nova instância da TreeNode classe sem texto nem valor.

public:
 TreeNode();

public TreeNode();

Public Sub New ()

Exemplos

O exemplo de código seguinte demonstra como usar este construtor para adicionar dinamicamente um nó ao TreeView controlo.


<%@ 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>

Observações

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

Note

Quando este construtor é usado, todas as propriedades do TreeNode objeto são definidas para os seus valores padrão. Certifique-se de definir as propriedades, conforme necessário, depois de criar o objeto.

Ver também

Aplica-se a

TreeNode(String)

Inicializa uma nova instância da TreeNode classe 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 que é exibido no TreeView controlo do nó.

Exemplos

O exemplo de código seguinte demonstra como usar este construtor para adicionar dinamicamente um nó ao TreeView controlo.


<%@ 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>

Observações

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

A tabela seguinte mostra o valor inicial da propriedade para uma instância de TreeNode.

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

Ver também

Aplica-se a

TreeNode(String, String)

Inicializa uma nova instância da TreeNode classe usando o texto e valor 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 que é exibido no TreeView controlo do nó.

value: String

Os dados suplementares associados ao nó, como dados usados para gerir eventos de postback.

Exemplos

O exemplo de código seguinte demonstra como usar este construtor para adicionar dinamicamente um nó ao TreeView controlo.


<%@ 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>

Observações

Use este construtor para inicializar uma nova instância da TreeNode classe usando o texto e o valor especificados pelos text parâmetros e, value respetivamente.

A tabela seguinte mostra os valores iniciais das propriedades para uma instância de TreeNode.

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

Ver também

Aplica-se a

TreeNode(TreeView, Boolean)

Inicializa uma nova instância da TreeNode classe 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 for TreeNode um nó raiz; caso contrário, false.

Ver também

TreeNodeTypes

Aplica-se a

TreeNode(String, String, String)

Inicializa uma nova instância da TreeNode classe usando o texto, valor e URL da imagem 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 que é exibido no TreeView controlo do nó.

value: String

Os dados suplementares associados ao nó, como dados usados para gerir eventos de postback.

imageUrl: String

A URL de uma imagem que é exibida ao lado do nó.

Exemplos

O exemplo de código seguinte demonstra como usar este construtor para adicionar dinamicamente um nó ao TreeView controlo.


<%@ 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>

Observações

Use este construtor para inicializar uma nova instância da TreeNode classe usando o texto, valor e URL da imagem especificados pelos textparâmetros, , value, e imageUrl respectivamente.

A tabela seguinte mostra os valores iniciais das propriedades para uma instância de TreeNode.

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

Ver também

Aplica-se a

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

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

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 que é exibido no TreeView controlo do nó.

value: String

Os dados suplementares associados ao nó, como dados usados para gerir eventos de postback.

imageUrl: String

A URL de uma imagem que é exibida ao lado do nó.

navigateUrl: String

O URL para ligar quando o nó é clicado.

target: String

A janela ou frame alvo onde é exibido o conteúdo da página Web ligado quando o nó é clicado.

Exemplos

O exemplo de código seguinte demonstra como usar este construtor para adicionar dinamicamente um nó ao TreeView controlo.


<%@ 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>

Observações

Use este construtor para inicializar uma nova instância da TreeNode classe usando os URLs de texto, valor, imagem e navegação, e o alvo de exibição especificados pelos textparâmetros, , value, imageUrlnavigateUrl, e target , respetivamente.

A tabela seguinte mostra os valores iniciais das propriedades para uma instância de TreeNode.

Property	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.

Ver também

Aplica-se a

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