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XNode.NodesBeforeSelf Method

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

Namespace:  System.Xml.Linq
Assemblies:   System.Xml.XDocument (in System.Xml.XDocument.dll)
  System.Xml.Linq (in System.Xml.Linq.dll)

'Declaration
Public Function NodesBeforeSelf As IEnumerable(Of XNode)

Return Value

Type: System.Collections.Generic.IEnumerable(Of XNode)
An IEnumerable(Of T) of XNode of the sibling nodes before this node, in document order.

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

This method uses deferred execution.

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

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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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