SiteMapPath.RootNodeTemplate Propriedade

public:
 virtual property System::Web::UI::ITemplate ^ RootNodeTemplate { System::Web::UI::ITemplate ^ get(); void set(System::Web::UI::ITemplate ^ value); };

[System.ComponentModel.Browsable(false)]
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)]
[System.Web.UI.TemplateContainer(typeof(System.Web.UI.WebControls.SiteMapNodeItem))]
public virtual System.Web.UI.ITemplate RootNodeTemplate { get; set; }

[<System.ComponentModel.Browsable(false)>]
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)>]
[<System.Web.UI.TemplateContainer(typeof(System.Web.UI.WebControls.SiteMapNodeItem))>]
member this.RootNodeTemplate : System.Web.UI.ITemplate with get, set

Public Overridable Property RootNodeTemplate As ITemplate

Valor de Propriedade

Um ITemplate objeto que implementa o InstantiateIn(Control) método, para renderizar conteúdo personalizado para o nó raiz de um caminho de navegação.

Atributos

BrowsableAttribute PersistenceModeAttribute TemplateContainerAttribute

Exemplos

O exemplo de código seguinte demonstra como definir programaticamente uma classe que implementa a ITemplate interface para envolver um Image controlo. Depois, a RootNodeTemplate propriedade é definida como uma instância da classe.

<%@ 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">
    private void Page_Load(object sender, System.EventArgs e)
    {
        // Create the SiteMapPath control.
        SiteMapPath navpath = new SiteMapPath();

        // Make the root node look unique.
        // The Image that you can use in your Web page is an
        // instance of the WebControls.Image class, not the
        // Drawing.Image class.
        System.Web.UI.WebControls.Image rootNodeImage =
            new System.Web.UI.WebControls.Image();
        rootNodeImage.ImageUrl = "myimage.jpg";
        ImageTemplate rootNodeImageTemplate = new ImageTemplate();
        rootNodeImageTemplate.MyImage = rootNodeImage;
        navpath.RootNodeTemplate = rootNodeImageTemplate;

        // Make the current node look unique.
        Style currentNodeStyle = new Style();
        navpath.CurrentNodeStyle.ForeColor = System.Drawing.Color.AliceBlue;
        navpath.CurrentNodeStyle.BackColor = System.Drawing.Color.Bisque;

        // Set the path separator to be something other
        // than the default.
        navpath.PathSeparator = "::";

        PlaceHolder1.Controls.Add(navpath);
    }


    // A simple Template class to wrap an image.
    public class ImageTemplate : ITemplate
    {
        private System.Web.UI.WebControls.Image myImage;
        public System.Web.UI.WebControls.Image MyImage
        {
            get
            {
                return myImage;
            }
            set
            {
                myImage = value;
            }
        }
        public void InstantiateIn(Control container)
        {
            container.Controls.Add(MyImage);
        }
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>About Our Company</title>
</head>
<body>
    <form id="Form1" method="post" runat="server">

      <asp:PlaceHolder id="PlaceHolder1" runat="server"></asp:PlaceHolder>

      <h1>About Our Company</h1>

      <p>Our company was founded in 1886.</p>

      <p>We use only the finest ingredients, organically grown fruits, and
      natural spices in our homemade pies. We use no artificial preservatives
      or coloring agents. We would not have it any other way!</p>

    </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">

    Private Sub Page_Load(sender As Object, e As EventArgs)
        ' Create the SiteMapPath control.
        Dim navpath As New SiteMapPath()

        ' Make the root node look unique.
        ' The Image that you can use in your Web page is an
        ' instance of the WebControls.Image class, not the
        ' Drawing.Image class.
        Dim rootNodeImage As New System.Web.UI.WebControls.Image()
        rootNodeImage.ImageUrl = "myimage.jpg"
        Dim rootNodeImageTemplate As New ImageTemplate()
        rootNodeImageTemplate.MyImage = rootNodeImage
        navpath.RootNodeTemplate = rootNodeImageTemplate

        ' Make the current node look unique.
        Dim currentNodeStyle As New Style()
        navpath.CurrentNodeStyle.ForeColor = System.Drawing.Color.AliceBlue
        navpath.CurrentNodeStyle.BackColor = System.Drawing.Color.Bisque

        ' Set the path separator to be something other
        ' than the default.
        navpath.PathSeparator = "::"

        PlaceHolder1.Controls.Add(navpath)
    End Sub ' Page_Load


    ' A simple Template class to wrap an image.
    Public Class ImageTemplate
      Implements ITemplate

        Private anImage As System.Web.UI.WebControls.Image
        Public Property MyImage As System.Web.UI.WebControls.Image
          Get
            return anImage
          End Get
          Set
            anImage = value
          End Set
        End Property ' MyImage

        Public Overridable Sub InstantiateIn(ByVal container As Control) Implements ITemplate.InstantiateIn
            container.Controls.Add(MyImage)
        End Sub ' InstantiateIn

    End Class ' ImageTemplate
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>About Our Company</title>
</head>
<body>
    <form id="Form1" method="post" runat="server">

      <asp:PlaceHolder id="PlaceHolder1" runat="server"></asp:PlaceHolder>

      <h1>About Our Company</h1>

      <p>Our company was founded in 1886.</p>

      <p>We use only the finest ingredients, organically grown fruits, and
      natural spices in our homemade pies. We use no artificial preservatives
      or coloring agents. We would not have it any other way!</p>

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

Observações

Defina o RootNodeTemplate para um ITemplate objeto para usar um Image controlo ou outro controlo, como a Label , como elemento de interface do nó raiz em vez de uma string.

Se a RootNodeTemplate propriedade estiver definida, o modelo sobrepõe tanto o texto do nó de navegação raiz apresentado como qualquer RootNodeStyle texto aplicado a ele. O modelo também sobrepõe as CurrentNodeTemplate propriedades e CurrentNodeStyle se a página raiz for a página atualmente apresentada.

Pode definir declarativamente a propriedade RootNodeTemplate para qualquer controlo de servidor Web, e a infraestrutura ASP.NET realiza os passos necessários para envolver o controlo do servidor Web como um ITemplate. No entanto, os controlos do servidor Web não implementam a ITemplate interface; portanto, quando trabalha com as ITemplate propriedades programaticamente, deve escrever um ITemplate wrapper para qualquer código modelo. Depois, a RootNodeTemplate propriedade é definida como uma instância do ITemplate wrapper.

Consulte também

• RootNodeStyle
• NodeTemplate
• Controlo do Servidor Web SiteMapPath