ElementsBeforeSelf Method (XName)
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XNode.ElementsBeforeSelf Method (XName)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Returns a filtered collection of the sibling elements before this node, in document order. Only elements that have a matching XName are included in the collection.

Namespace:  System.Xml.Linq
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)

'Declaration
Public Function ElementsBeforeSelf ( _
	name As XName _
) As IEnumerable(Of XElement)

Parameters

name
Type: System.Xml.Linq.XName
The XName to match.

Return Value

Type: System.Collections.Generic.IEnumerable(Of XElement)
An IEnumerable(Of T) of XElement of the sibling elements before this node, in document order. Only elements that have a matching XName are included in the collection.

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

This method uses deferred execution.

The following example uses this method.


Dim output As New StringBuilder
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 child As XElement = xmlTree.<Child3>(0)
Dim elements As IEnumerable(Of XElement) = child.ElementsBeforeSelf("Child2")

For Each el In elements
    output.Append(el.Name)
    output.Append(Environment.NewLine)
Next

OutputTextBlock.Text = output.ToString()


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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