以下为引用的内容：
Const DEFAULT_UNNAMED_PAGE_TITLE As String = "Untitled Page"
Const DEFAULT_PAGE_TITLE As String = "Welcome to my Website!!"
Protected Sub Page_Load(ByVal sender As Object， ByVal e As System.EventArgs) Handles Me.Load
'Set the page's title， if needed
If String.IsNullOrEmpty(Page.Title) OrElse Page.Title = DEFAULT_UNNAMED_PAGE_TITLE Then
If SiteMap.CurrentNode Is Nothing Then
Page.Title = DEFAULT_PAGE_TITLE
Else
Page.Title = GetPageTitleBasedOnSiteNavigation()
'Can also use the following if you'd rather
'Page.Title = GetPageTitleBasedOnSiteNavigationUsingRecursion(SiteMap.CurrentNode)
End If
End If
End Sub
Private Function GetPageTitleBasedOnSiteNavigation() As String
If SiteMap.CurrentNode Is Nothing Then
Throw New ArgumentException("currentNode cannot be Nothing")
End If
'We are visiting a page defined in the site map - build up the page title
'based on the site map node's place in the hierarchy
Dim output As String = String.Empty
Dim currentNode As SiteMapNode = SiteMap.CurrentNode
While currentNode IsNot Nothing
If output.Length > 0 Then
output = currentNode.Title & " :: " & output
Else
output = currentNode.Title
End If
currentNode = currentNode.ParentNode
End While
Return output
End Function | 
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