XContainer.DescendantNodes 方法

定义

按文档顺序返回此文档或元素的子代节点集合。Returns a collection of the descendant nodes for this document or element, in document order.

public:
 System::Collections::Generic::IEnumerable<System::Xml::Linq::XNode ^> ^ DescendantNodes();
public System.Collections.Generic.IEnumerable<System.Xml.Linq.XNode> DescendantNodes ();
member this.DescendantNodes : unit -> seq<System.Xml.Linq.XNode>
Public Function DescendantNodes () As IEnumerable(Of XNode)

返回

XNodeIEnumerable<T>,其中按文档顺序包含 XContainer 的子代节点。An IEnumerable<T> of XNode containing the descendant nodes of the XContainer, in document order.

示例

下面的示例创建一个 XML 树,然后循环访问该DescendantNodes轴。The following example creates an XML tree, and then iterates through the DescendantNodes axis.

XElement xmlTree = new XElement("Root",  
    // Attributes are not nodes, so will not be returned by DescendantNodes.  
    new XAttribute("Att1", "AttributeContent"),  
    new XElement("Child",  
        new XElement("GrandChild", "element content")  
    )  
);  
IEnumerable<XNode> dnas =  
    from node in xmlTree.DescendantNodes()  
    select node;  
foreach (XNode node in dnas)  
{  
    if (node is XElement)  
        Console.WriteLine((node as XElement).Name);  
    else  
        Console.WriteLine(node);  
}  
' Attributes are not nodes, so will not be returned by DescendantNodes.  
Dim xmlTree As XElement = _   
    <Root Att1="AttributeContent">  
        <Child>  
            <GrandChild>element content</GrandChild>  
        </Child>  
    </Root>  
  
Dim dnas = From node In xmlTree.DescendantNodes _  
           Select node  
  
For Each node In dnas  
    If TypeOf node Is XElement Then  
        Console.WriteLine(DirectCast(node, XElement).Name)  
    Else  
        Console.WriteLine(node)  
    End If  
Next  

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

Child  
GrandChild  
element content  

注解

请注意,属性不被视为中LINQ to XMLLINQ to XML的节点,因此它们将不是此方法返回的集合的一部分。Note that attributes are not considered to be nodes in LINQ to XMLLINQ to XML, so they will not be part of the collection that is returned by this method.

此方法使用延迟执行。This method uses deferred execution.

适用于

另请参阅