XNode.IsAfter(XNode) 方法

定义

确定当前节点是否按文档顺序显示在指定节点之后。Determines if the current node appears after a specified node in terms of document order.

public:
 bool IsAfter(System::Xml::Linq::XNode ^ node);
public bool IsAfter (System.Xml.Linq.XNode node);
member this.IsAfter : System.Xml.Linq.XNode -> bool
Public Function IsAfter (node As XNode) As Boolean

参数

node
XNode

要比较文档顺序的 XNodeThe XNode to compare for document order.

返回

如果此节点显示在指定节点之后,则为 true;否则为 falsetrue if this node appears after the specified node; otherwise false.

示例

下面的示例使用此方法。The following example uses this method.

XElement xmlTree = new XElement("Root",  
    new XText("Text content."),  
    new XElement("Child1", "child1 content"),  
    new XElement("Child2", "child2 content"),  
    new XElement("Child3", "child3 content"),  
    new XText("More text content."),  
    new XElement("Child4", "child4 content"),  
    new XElement("Child5", "child5 content")  
);  
XElement child3 = xmlTree.Element("Child3");  
XElement child5 = xmlTree.Element("Child5");  
if (child5.IsAfter(child3))  
    Console.WriteLine("Child5 is after Child3");  
else  
    Console.WriteLine("Child5 is not after Child3");  
Dim xmlTree As XElement = _   
        <Root>Text content.  
            <Child1>child1 content</Child1>  
            <Child2>child2 content</Child2>  
            <Child3>child3 content</Child3>More text content.  
            <Child4>child4 content</Child4>  
            <Child5>child5 content</Child5>  
        </Root>  
  
Dim child3 As XElement = xmlTree.<Child3>(0)  
Dim child5 As XElement = xmlTree.<Child5>(0)  
If (child5.IsAfter(child3)) Then  
    Console.WriteLine("Child5 is after Child3")  
Else  
    Console.WriteLine("Child5 is not after Child3")  
End If  

该示例产生下面的输出:This example produces the following output:

Child5 is after Child3  

注解

XContainer 将其子节点存储为 XNode 对象的单向链接列表。The XContainer stores its child nodes as a singly-linked list of XNode objects. 这意味着 CompareDocumentOrder 方法必须遍历所比较的两个节点的上级,直到它找到公共父级。This means that the CompareDocumentOrder method must traverse the ancestors of the two nodes being compared until it finds the common parent. 然后,它必须遍历公共父节点的列表,以确定所比较的两个节点的顺序。Then it must traverse the list of the common parent's child nodes to determine the order of the two nodes being compared. 因此,使用此方法可能会影响性能。Therefore, using this method might affect your performance.

适用于

另请参阅