SiteMapNodeCollection.Contains(SiteMapNode) 方法

定义

命名空间:

System.Web

程序集:

System.Web.dll

确定集合是否包含特定的 SiteMapNode 对象。

public:
 virtual bool Contains(System::Web::SiteMapNode ^ value);

public virtual bool Contains (System.Web.SiteMapNode value);

abstract member Contains : System.Web.SiteMapNode -> bool
override this.Contains : System.Web.SiteMapNode -> bool

Public Overridable Function Contains (value As SiteMapNode) As Boolean

参数

value

SiteMapNode

要在 SiteMapNode 中定位的 SiteMapNodeCollection。

返回

Boolean

如果 SiteMapNodeCollection 包含指定的 SiteMapNode，则为 true；否则为 false。

示例

下面的代码示例演示如何使用 Contains 类的和 IndexOf 方法 SiteMapNodeCollection 。 该代码检查两个提供程序， AspNetXmlSiteMapProvider 以及 MyXmlSiteMapProvider是否检查重复的根节点的子节点。

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    

注解

该方法 Contains 通过调用 Object.Equals 该方法来确定相等性。

另请参阅

• Count
• IndexOf(SiteMapNode)