XNode.CompareDocumentOrder Method

Parameters

• n1
  Type: System.Xml.Linq.XNode
  First XNode to compare.

• n2
  Type: System.Xml.Linq.XNode
  Second XNode to compare.

Return Value

Type: System.Int32
An int containing 0 if the nodes are equal; -1 if n1 is before n2; 1 if n1 is after n2.

Dim output As New StringBuilder
Dim xmlTree As XElement = _
        <Root>
            <Child1>
                <GrandChild1>1</GrandChild1>
                <GrandChild2>2</GrandChild2>
                <GrandChild3>3</GrandChild3>
            </Child1>
            <Child2>
                <GrandChild4>4</GrandChild4>
                <GrandChild5>5</GrandChild5>
                <GrandChild6>6</GrandChild6>
            </Child2>
        </Root>

Dim el1 As XElement = xmlTree...<GrandChild2>(0)
Dim el2 As XElement = xmlTree...<GrandChild6>(0)

If (XElement.CompareDocumentOrder(el1, el2) = 0) Then
    output.Append("Compared elements are the same element")
    output.Append(Environment.NewLine)
ElseIf (XElement.CompareDocumentOrder(el1, el2) > 0) Then
    output.Append("el1 is after el2")
    output.Append(Environment.NewLine)
Else
    output.Append("el1 is before el2")
    output.Append(Environment.NewLine)
End If

OutputTextBlock.Text = output.ToString()

StringBuilder output = new StringBuilder();
XElement xmlTree = new XElement("Root",
    new XElement("Child1",
        new XElement("GrandChild1", 1),
        new XElement("GrandChild2", 2),
        new XElement("GrandChild3", 3)
    ),
    new XElement("Child2",
        new XElement("GrandChild4", 4),
        new XElement("GrandChild5", 5),
        new XElement("GrandChild6", 6)
    )
);
XElement el1 = xmlTree.Descendants("GrandChild2").First();
XElement el2 = xmlTree.Descendants("GrandChild6").First();
if (XElement.CompareDocumentOrder(el1, el2) == 0)
    output.Append("Compared elements are the same element" + Environment.NewLine);
else if (XElement.CompareDocumentOrder(el1, el2) > 0)
    output.Append("el1 is after el2" + Environment.NewLine);
else
    output.Append("el1 is before el2" + Environment.NewLine);

OutputTextBlock.Text = output.ToString();