XNode.NodesBeforeSelf Method

Definition

Namespace:

System.Xml.Linq

Assembly:

System.Xml.XDocument.dll

Source:

XNode.cs

Returns a collection of the sibling nodes before this node, in document order.

public:
 System::Collections::Generic::IEnumerable<System::Xml::Linq::XNode ^> ^ NodesBeforeSelf();

public System.Collections.Generic.IEnumerable<System.Xml.Linq.XNode> NodesBeforeSelf ();

member this.NodesBeforeSelf : unit -> seq<System.Xml.Linq.XNode>

Public Function NodesBeforeSelf () As IEnumerable(Of XNode)

Returns

IEnumerable<XNode>

An IEnumerable<T> of XNode of the sibling nodes before this node, in document order.

Examples

The following example creates an XML tree, and then queries the tree using this axis method.

XElement xmlTree = new XElement("Root",  
    new XText("Text content."),  
    new XElement("Child1", "child1 content"),  
    new XElement("Child2", "child2 content"),  
    new XText("More text content."),  
    new XElement("child3", "child3 content")  
);  
XElement child = xmlTree.Element("Child2");  
IEnumerable<XNode> nodes =  
    from node in child.NodesBeforeSelf()  
    select node;  
foreach (XNode node in nodes)  
    Console.WriteLine("Node type: {0}  {1}",  
        node.NodeType,  
        node.NodeType == XmlNodeType.Text ? (node as XText).Value : "");  

Dim xmlTree As XElement = New XElement("Root", _  
    New XText("Text content."), _  
    New XElement("Child1", "child1 content"), _  
    New XElement("Child2", "child2 content"), _  
    New XText("More text content."), _  
    New XElement("child3", "child3 content") _  
)  

Dim child As XElement = xmlTree.Element("Child2")  
Dim nodes As IEnumerable(Of XNode) = _  
    From node In child.NodesBeforeSelf() _  
    Select node  
For Each node As XNode In nodes  
    Dim s As String = ""  
    If node.NodeType = XmlNodeType.Text Then  
        s = DirectCast(node, XText).Value  
    End If  
    Console.WriteLine("Node type: {0}  {1}", node.NodeType, s)  
Next  

This example produces the following output:

Node type: Text  Text content.  
Node type: Element  

Remarks

This method only includes siblings in the returned collection. It does not include descendants.

This method uses deferred execution.

See also

• LINQ to XML overview