SiteMapPath Costruttore
Definizione
Inizializza una nuova istanza della classe SiteMapPath.Initializes a new instance of the SiteMapPath class.
public:
SiteMapPath();public SiteMapPath ();Public Sub New ()Esempi
Nell'esempio di codice riportato di seguito viene illustrato SiteMapPath come utilizzare il costruttore SiteMapPath per aggiungere un controllo a una pagina.The following code example demonstrates how to use the SiteMapPath constructor to add a SiteMapPath control to a page. Per il corretto funzionamento dell'esempio, è necessario aggiungere un'immagine alla directory radice e modificare il nome dell'immagine nel codice di esempio da "image. jpg" al nome del file di immagine.For the example to work, you need to add an image to your root directory and change the image name in the example code from "myimage.jpg" to the name of your image file.
<%@ 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>
Commenti
Utilizzare questo costruttore per creare e inizializzare una nuova istanza della SiteMapPath classe.Use this constructor to create and initialize a new instance of the SiteMapPath class. Per aggiungere dinamicamente un SiteMapPath controllo a una pagina, creare un nuovo SiteMapPath oggetto, impostarne le proprietà e Control.Controls quindi aggiungerlo alla raccolta di un controllo contenitore, ad esempio PlaceHolder.To dynamically add a SiteMapPath control to a page, create a new SiteMapPath object, set its properties, and then add it to the Control.Controls collection of a container control such as PlaceHolder.