SiteMapPath 构造函数
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
初始化 SiteMapPath 类的新实例。
public:
SiteMapPath();public SiteMapPath ();Public Sub New ()示例
下面的代码示例演示如何使用 SiteMapPath 构造函数将控件添加到 SiteMapPath 页面。 若要使本示例正常工作，需要将映像添加到根目录，并将示例代码中的映像名称从“myimage.jpg”更改为映像文件的名称。
<%@ 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>
注解
使用此构造函数创建和初始化 类的新实例 SiteMapPath 。 若要将控件动态添加到 SiteMapPath 页面，请创建一个新的 SiteMapPath 对象，设置其属性，然后将其添加到容器控件的集合， Control.Controls 例如 PlaceHolder。
