Server Templates

NodeTemplate

You can use the NodeTemplate for both setting template to a single navigation node and to all nodes in a navigation(applied as global template). For example you can set a global template to all navigation nodes and if you need to further customize only a single orseveral nodes you can do so by applying the NodeTemplate again only to the needed nodes. This can be done in the TemplateNeeded event.

If a node has a template, it will not render an anchor (<a>) with the NavigateUrl property. If you want the node to act as an anchor, you should add the desired hyperlink in the template.

Example

The following example (Figure 1.) shows a navigation that uses a global template for all parent and child nodes:

Figure 1: Using NodeTemplate as a global template applied to all nodes.

navigation-server-template-runtime

<telerik:RadNavigation runat="server" ID="RadNavigation2"  DataKeyNames="Text,Checked" DataFieldID="Id" DataFieldParentID="ParentId" DataTextField="Text">
</telerik:RadNavigation>
protected void Page_Load(object sender, EventArgs e)
{
    List<CustomNavigatorNode> nodes = new List<CustomNavigatorNode>();

    nodes.Add(new CustomNavigatorNode(1, "Home", true, "http://localhost"));
    nodes.Add(new CustomNavigatorNode(2, "Products", false, "http://localhost/Products"));
    nodes.Add(new CustomNavigatorNode(3, "About", false, "http://localhost/About"));
    nodes.Add(new CustomNavigatorNode(4, "Product 1", false, "http://localhost/Product-1", 2));
    nodes.Add(new CustomNavigatorNode(5, "Product 2", false, "http://localhost/Product-2", 2));
    nodes.Add(new CustomNavigatorNode(6, "Product 3", false, "http://localhost/Product-3", 2));

    RadNavigation1.DataSource = nodes;
    RadNavigation1.NodeTemplate = new CustomDataBoundTemplate();
    RadNavigation1.DataBind();
}

public class CustomDataBoundTemplate : ITemplate
{
    public void InstantiateIn(Control container)
    {
        CheckBox checkbox = new CheckBox();
        checkbox.ID = "CheckBox1";
        checkbox.DataBinding += delegate
        {
            NavigationNode bindingContainer = (NavigationNode)checkbox.BindingContainer;
            checkbox.Checked = (bool)bindingContainer.TemplateData["Checked"];
        };
        container.Controls.Add(checkbox);

        Label label = new Label();
        label.ID = "Label1";
        label.DataBinding += delegate
        {
            NavigationNode bindingContainer = (NavigationNode)label.BindingContainer;
            label.Text = bindingContainer.TemplateData["Text"].ToString();
        };
        container.Controls.Add(label);
        Label label1 = new Label();
        label1.ID = "Toggle";
        label1.CssClass = "rnvToggle radIcon";

        label1.DataBinding += delegate
        {
            NavigationNode bindingContainer = (NavigationNode)label1.BindingContainer;
            if (bindingContainer.Nodes.Count > 0)
            {
                label1.Visible = true;
            }
            else
            {
                label1.Visible = false;
            }
        };
        container.Controls.Add(label1);
    }
}

public class CustomNavigatorNode
{
    public int Id { get; set; }
    public string Text { get; set; }
    public bool Checked { get; set; }
    public string Url { get; set; }
    public int? ParentId { get; set; }

    public CustomNavigatorNode() { }

    public CustomNavigatorNode(int id, string text, bool isChecked, string url, int? parentId = null)
    {
        Id = id;
        Text = text;
        Checked = isChecked;
        Url = url;
        ParentId = parentId;
    }
}
Protected Sub Page_Load(sender As Object, e As EventArgs)
    Dim nodes As New List(Of CustomNavigatorNode)()

    nodes.Add(New CustomNavigatorNode(1, "Home", True, "http://localhost"))
    nodes.Add(New CustomNavigatorNode(2, "Products", False, "http://localhost/Products"))
    nodes.Add(New CustomNavigatorNode(3, "About", False, "http://localhost/About"))
    nodes.Add(New CustomNavigatorNode(4, "Product 1", False, "http://localhost/Product-1", 2))
    nodes.Add(New CustomNavigatorNode(5, "Product 2", False, "http://localhost/Product-2", 2))
    nodes.Add(New CustomNavigatorNode(6, "Product 3", False, "http://localhost/Product-3", 2))

    RadNavigation1.DataSource = nodes
    RadNavigation1.NodeTemplate = New CustomDataBoundTemplate()
    RadNavigation1.DataBind()
End Sub

Public Class CustomDataBoundTemplate
    Implements ITemplate
    Public Sub InstantiateIn(container As Control)
        Dim checkbox As New CheckBox()
        checkbox.ID = "CheckBox1"
        checkbox.DataBinding += Sub()
                                    Dim bindingContainer As NavigationNode = DirectCast(checkbox.BindingContainer, NavigationNode)
                                    checkbox.Checked = CBool(bindingContainer.TemplateData("Checked"))

                                End Sub
        container.Controls.Add(checkbox)

        Dim label As New Label()
        label.ID = "Label1"
        label.DataBinding += Sub()
                                 Dim bindingContainer As NavigationNode = DirectCast(label.BindingContainer, NavigationNode)
                                 label.Text = bindingContainer.TemplateData("Text").ToString()

                             End Sub
        container.Controls.Add(label)
        Dim label1 As New Label()
        label1.ID = "Toggle"
        label1.CssClass = "rnvToggle radIcon"

        label1.DataBinding += Sub()
                                  Dim bindingContainer As NavigationNode = DirectCast(label1.BindingContainer, NavigationNode)
                                  If bindingContainer.Nodes.Count > 0 Then
                                      label1.Visible = True
                                  Else
                                      label1.Visible = False
                                  End If

                              End Sub
        container.Controls.Add(label1)
    End Sub
End Class

Public Class CustomNavigatorNode
    Public Property Id() As Integer
        Get
            Return m_Id
        End Get
        Set(value As Integer)
            m_Id = Value
        End Set
    End Property
    Private m_Id As Integer
    Public Property Text() As String
        Get
            Return m_Text
        End Get
        Set(value As String)
            m_Text = Value
        End Set
    End Property
    Private m_Text As String
    Public Property Checked() As Boolean
        Get
            Return m_Checked
        End Get
        Set(value As Boolean)
            m_Checked = Value
        End Set
    End Property
    Private m_Checked As Boolean
    Public Property Url() As String
        Get
            Return m_Url
        End Get
        Set(value As String)
            m_Url = Value
        End Set
    End Property
    Private m_Url As String
    Public Property ParentId() As System.Nullable(Of Integer)
        Get
            Return m_ParentId
        End Get
        Set(value As System.Nullable(Of Integer))
            m_ParentId = Value
        End Set
    End Property
    Private m_ParentId As System.Nullable(Of Integer)

    Public Sub New()
    End Sub

    Public Sub New(id**1 As Integer, text**2 As String, isChecked As Boolean, url**3 As String, Optional parentId**4 As System.Nullable(Of Integer) = Nothing)
        Id = id__1
        Text = text__2
        Checked = isChecked
        Url = url__3
        ParentId = parentId__4
    End Sub
End Class

See Also

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