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

 

Initializes a new instance of the TreeNode class using the specified text, value, image URL, navigation URL, and target.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

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

Parameters

text
Type: System.String

The text that is displayed in the TreeView control for the node.

value
Type: System.String

The supplemental data associated with the node, such as data used for handling postback events.

imageUrl
Type: System.String

The URL to an image that is displayed next to the node.

navigateUrl
Type: System.String

The URL to link to when the node is clicked.

target
Type: System.String

The target window or frame in which to display the Web page content linked to when the node is clicked.

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.

The following table shows initial property values for an instance of TreeNode.

Property

Initial value

Text

The value of the text parameter.

Value

The value of the value parameter.

ImageUrl

The value of the imageUrl parameter.

NavigateUrl

The value of the navigateUrl parameter.

Target

The value of the target parameter.

The following code example demonstrates how to use this constructor to dynamically add a node to the TreeView control.


<%@ 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>

.NET Framework
Available since 2.0
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