TreeNode Konstruktoren

Definition

Initialisiert eine neue Instanz der TreeNode-Klasse.Initializes a new instance of the TreeNode class.

Überlädt

TreeNode()

Initialisiert eine neue Instanz der TreeNode-Klasse ohne Text oder einen Wert.Initializes a new instance of the TreeNode class without text or a value.

TreeNode(String)

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Textes.Initializes a new instance of the TreeNode class using the specified text.

TreeNode(String, String)

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Texts und Werts.Initializes a new instance of the TreeNode class using the specified text and value.

TreeNode(TreeView, Boolean)

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Besitzers.Initializes a new instance of the TreeNode class using the specified owner.

TreeNode(String, String, String)

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Texts, des angegebenen Werts und der angegebenen Bild-URL.Initializes a new instance of the TreeNode class using the specified text, value, and image URL.

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

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Texts, des angegebenen Werts, der angegebenen URL zu einem Bild, der URL für die Navigation sowie eines Ziels.Initializes a new instance of the TreeNode class using the specified text, value, image URL, navigation URL, and target.

TreeNode()

Initialisiert eine neue Instanz der TreeNode-Klasse ohne Text oder einen Wert.Initializes a new instance of the TreeNode class without text or a value.

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

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie dieser Konstruktor verwendet wird, um dem-Steuerelement dynamisch einen Knoten hinzuzufügen TreeView .The following code example demonstrates how to use this constructor to dynamically add a node to the TreeView control.


<%@ 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>

Hinweise

Verwenden Sie diesen Konstruktor, um eine neue Instanz der- TreeNode Klasse mit den Standardwerten zu initialisieren.Use this constructor to initialize a new instance of the TreeNode class using the default values.

Hinweis

Wenn dieser Konstruktor verwendet wird, werden alle Eigenschaften im TreeNode Objekt auf ihre Standardwerte festgelegt.When this constructor is used, all properties in the TreeNode object are set to their default values. Stellen Sie sicher, dass Sie nach dem Erstellen des Objekts die Eigenschaften nach Bedarf festlegen.Be sure to set the properties, as necessary, after creating the object.

Weitere Informationen

TreeNode(String)

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Textes.Initializes a new instance of the TreeNode class using the specified text.

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)

Parameter

text
String

Der Text, der im TreeView-Steuerelement für den Knoten angezeigt wird.The text that is displayed in the TreeView control for the node.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie dieser Konstruktor verwendet wird, um dem-Steuerelement dynamisch einen Knoten hinzuzufügen TreeView .The following code example demonstrates how to use this constructor to dynamically add a node to the TreeView control.


<%@ 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>

Hinweise

Verwenden Sie diesen Konstruktor, um eine neue Instanz der- TreeNode Klasse mit dem durch den-Parameter angegebenen Text zu initialisieren text .Use this constructor to initialize a new instance of the TreeNode class using the text specified by the text parameter.

In der folgenden Tabelle wird der anfängliche Eigenschafts Wert für eine Instanz von angezeigt TreeNode .The following table shows the initial property value for an instance of TreeNode.

EigenschaftProperty AnfangswertInitial value
Text Der Wert des text-Parameters.The value of the text parameter.

Weitere Informationen

TreeNode(String, String)

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Texts und Werts.Initializes a new instance of the TreeNode class using the specified text and value.

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)

Parameter

text
String

Der Text, der im TreeView-Steuerelement für den Knoten angezeigt wird.The text that is displayed in the TreeView control for the node.

value
String

Ergänzende Daten, die dem Knoten zugeordnet sind (z. B. Daten zum Behandeln von Postbackereignissen).The supplemental data associated with the node, such as data used for handling postback events.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie dieser Konstruktor verwendet wird, um dem-Steuerelement dynamisch einen Knoten hinzuzufügen TreeView .The following code example demonstrates how to use this constructor to dynamically add a node to the TreeView control.


<%@ 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>

Hinweise

Verwenden Sie diesen Konstruktor initialisiert eine neue Instanz der dem TreeNode -Klasse mit dem Text und der angegebene Wert der text und value Parameter bzw.Use this constructor to initialize a new instance of the TreeNode class using the text and value specified by the text and value parameters, respectively.

In der folgenden Tabelle werden die anfänglichen Eigenschaftswerte für eine Instanz von angezeigt TreeNode .The following table shows initial property values for an instance of TreeNode.

EigenschaftProperty AnfangswertInitial value
Text Der Wert des text-Parameters.The value of the text parameter.
Value Der Wert des value-Parameters.The value of the value parameter.

Weitere Informationen

TreeNode(TreeView, Boolean)

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Besitzers.Initializes a new instance of the TreeNode class using the specified owner.

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)

Parameter

owner
TreeView

Die TreeView, die den neuen TreeNode enthalten wird.The TreeView that will contain the new TreeNode.

isRoot
Boolean

true, wenn TreeNode ein Stammknoten ist, andernfalls false.true if the TreeNode is a root node; otherwise, false.

Weitere Informationen

TreeNode(String, String, String)

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Texts, des angegebenen Werts und der angegebenen Bild-URL.Initializes a new instance of the TreeNode class using the specified text, value, and image URL.

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)

Parameter

text
String

Der Text, der im TreeView-Steuerelement für den Knoten angezeigt wird.The text that is displayed in the TreeView control for the node.

value
String

Ergänzende Daten, die dem Knoten zugeordnet sind (z. B. Daten zum Behandeln von Postbackereignissen).The supplemental data associated with the node, such as data used for handling postback events.

imageUrl
String

Die URL zu einem Bild, das neben dem Knoten angezeigt wird.The URL to an image that is displayed next to the node.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie dieser Konstruktor verwendet wird, um dem-Steuerelement dynamisch einen Knoten hinzuzufügen TreeView .The following code example demonstrates how to use this constructor to dynamically add a node to the TreeView control.


<%@ 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>

Hinweise

Verwenden Sie diesen Konstruktor initialisiert eine neue Instanz der dem TreeNode -Klasse mit dem Text, Wert und Bild-URL, die gemäß der text, value, und imageUrl Parameter bzw.Use this constructor to initialize a new instance of the TreeNode class using the text, value, and image URL specified by the text, value, and imageUrl parameters, respectively.

In der folgenden Tabelle werden die anfänglichen Eigenschaftswerte für eine Instanz von angezeigt TreeNode .The following table shows initial property values for an instance of TreeNode.

EigenschaftProperty AnfangswertInitial value
Text Der Wert des text-Parameters.The value of the text parameter.
Value Der Wert des value-Parameters.The value of the value parameter.
ImageUrl Der Wert des imageUrl-Parameters.The value of the imageUrl parameter.

Weitere Informationen

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

Initialisiert eine neue Instanz der TreeNode-Klasse unter Verwendung des angegebenen Texts, des angegebenen Werts, der angegebenen URL zu einem Bild, der URL für die Navigation sowie eines Ziels.Initializes a new instance of the TreeNode class using the specified text, value, image URL, navigation URL, and target.

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)

Parameter

text
String

Der Text, der im TreeView-Steuerelement für den Knoten angezeigt wird.The text that is displayed in the TreeView control for the node.

value
String

Ergänzende Daten, die dem Knoten zugeordnet sind (z. B. Daten zum Behandeln von Postbackereignissen).The supplemental data associated with the node, such as data used for handling postback events.

imageUrl
String

Die URL zu einem Bild, das neben dem Knoten angezeigt wird.The URL to an image that is displayed next to the node.

navigateUrl
String

Die URL, die geöffnet werden soll, wenn auf den Knoten geklickt wird.The URL to link to when the node is clicked.

target
String

Das Zielfenster oder der Zielframe, in dem der Inhalt der verknüpften Webseite dargestellt werden soll, wenn auf den Knoten geklickt wird.The target window or frame in which to display the Web page content linked to when the node is clicked.

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie dieser Konstruktor verwendet wird, um dem-Steuerelement dynamisch einen Knoten hinzuzufügen TreeView .The following code example demonstrates how to use this constructor to dynamically add a node to the TreeView control.


<%@ 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>

Hinweise

Verwenden Sie diesen Konstruktor, um eine neue Instanz der TreeNode -Klasse mit dem Text, dem Wert, den Bild-und Navigations-URLs und dem anzeigen Ziel zu initialisieren, die durch die text value Parameter,,, und angegeben imageUrl navigateUrl target werden.Use this constructor to initialize a new instance of the TreeNode class using the text, value, image and navigation URLs, and display target specified by the text, value, imageUrl, navigateUrl, and target parameters, respectively.

In der folgenden Tabelle werden die anfänglichen Eigenschaftswerte für eine Instanz von angezeigt TreeNode .The following table shows initial property values for an instance of TreeNode.

EigenschaftProperty AnfangswertInitial value
Text Der Wert des text-Parameters.The value of the text parameter.
Value Der Wert des value-Parameters.The value of the value parameter.
ImageUrl Der Wert des imageUrl-Parameters.The value of the imageUrl parameter.
NavigateUrl Der Wert des navigateUrl-Parameters.The value of the navigateUrl parameter.
Target Der Wert des target-Parameters.The value of the target parameter.

Weitere Informationen

Gilt für: