编辑

通过

SiteMapNodeCollection.IndexOf(SiteMapNode) Method

Definition

Namespace:
System.Web
Assembly:
System.Web.dll

Searches for the specified SiteMapNode object, and then returns the zero-based index of the first occurrence within the entire collection.

public:
 virtual int IndexOf(System::Web::SiteMapNode ^ value);
public virtual int IndexOf(System.Web.SiteMapNode value);
abstract member IndexOf : System.Web.SiteMapNode -> int
override this.IndexOf : System.Web.SiteMapNode -> int
Public Overridable Function IndexOf (value As SiteMapNode) As Integer

Parameters

value
SiteMapNode

The SiteMapNode to locate in the SiteMapNodeCollection.

Returns

Int32

The zero-based index of the first occurrence of value within the entire SiteMapNodeCollection, if found; otherwise, -1.

Examples

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.

String providername1 = "AspNetXmlSiteMapProvider";
String providername2 = "MyXmlSiteMapProvider";
SiteMapProviderCollection providers = SiteMap.Providers;

if (providers[providername1] != null && providers[providername2] != null)
{
  SiteMapProvider provider1 = providers[providername1];
  SiteMapProvider provider2 = providers[providername2];
  SiteMapNodeCollection collection1 = provider1.RootNode.ChildNodes;
  SiteMapNodeCollection collection2 = provider2.RootNode.ChildNodes;
  int matches = 0;
  foreach (SiteMapNode node in collection1)
  {
    if (collection2.Contains(node))
    {
      Response.Write("Match found at " +
        providername1 + ", index = " +
        collection1.IndexOf(node) + " with " +
        providername2 + ", index = " +
        collection2.IndexOf(node) + ".<br />");
      matches++;
    }
  }
  Response.Write("Number of matches found = " +
    matches.ToString() + ".");
}
else
{
  Response.Write(providername1 + " or " +
    providername2 + " not found.");
}

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

Remarks

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

Applies to