SiteMapNodeCollection.Contains Method (SiteMapNode)

 

Determines whether the collection contains a specific SiteMapNode object.

Namespace:   System.Web
Assembly:  System.Web (in System.Web.dll)

Public Overridable Function Contains (
	value As SiteMapNode
) As Boolean

Parameters

value
Type: System.Web.SiteMapNode

The SiteMapNode to locate in the SiteMapNodeCollection.

Return Value

Type: System.Boolean

true if the SiteMapNodeCollection contains the specified SiteMapNode; otherwise, false.

The Contains method determines equality by calling the Object.Equals method.

The following code example demonstrates how to use the Contains and IndexOf methods of the SiteMapNodeCollection class. The code checks two providers, AspNetXmlSiteMapProvider and MyXmlSiteMapProvider, for child nodes of the root node that are duplicates.

Dim providername1 As String = "xAspNetXmlSiteMapProvider"
Dim providername2 As String = "MyXmlSiteMapProvider"
Dim providers As SiteMapProviderCollection = SiteMap.Providers

If Not (providers(providername1) Is Nothing) AndAlso Not (providers(providername2) Is Nothing) Then
  Dim provider1 As SiteMapProvider = providers(providername1)
  Dim provider2 As SiteMapProvider = providers(providername2)
  Dim collection1 As SiteMapNodeCollection = provider1.RootNode.ChildNodes
  Dim collection2 As SiteMapNodeCollection = provider2.RootNode.ChildNodes
  Dim matches As Integer = 0
  Dim node As SiteMapNode
  For Each node In collection1
    If collection2.Contains(node) Then
      Response.Write("Match found at " & _
      providername1 & ", index = " & _
      collection1.IndexOf(node) & " with " & _
      providername2 & ", index = " & _
      collection2.IndexOf(node) & ".<br />")
      matches += 1
    End If
  Next node
  Response.Write("Number of matches found = " & _
  matches.ToString() + ".")
Else
  Response.Write(providername1 & " or " & _
  providername2 & " not found.")
End If    

.NET Framework
Available since 2.0
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