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XNode.IsBefore Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Determines if the current node appears before a specified node in terms of document order.

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

Syntax

'Declaration
Public Function IsBefore ( _
    node As XNode _
) As Boolean

public bool IsBefore(
    XNode node
)

Parameters

Return Value

Type: System.Boolean
true if this node appears before the specified node; otherwise false.

Examples

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 child3 As XElement = xmlTree.<Child3>(0)
Dim child5 As XElement = xmlTree.<Child5>(0)
If (child5.IsBefore(child3)) Then
    output.Append("Child5 is before Child3")
    output.Append(Environment.NewLine)
Else
    output.Append("Child5 is not before Child3")
    output.Append(Environment.NewLine)
End If

OutputTextBlock.Text = output.ToString()

StringBuilder output = new StringBuilder();
XElement xmlTree = new XElement("Root",
    new XText("Text content."),
    new XElement("Child1", "child1 content"),
    new XElement("Child2", "child2 content"),
    new XElement("Child3", "child3 content"),
    new XText("More text content."),
    new XElement("Child4", "child4 content"),
    new XElement("Child5", "child5 content")
);
XElement child3 = xmlTree.Element("Child3");
XElement child5 = xmlTree.Element("Child5");
if (child5.IsBefore(child3))
    output.Append("Child5 is before Child3");
else
    output.Append("Child5 is not before Child3");

OutputTextBlock.Text = output.ToString();

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.