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XNode.AddBeforeSelf Method (Object)

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

Adds the specified content immediately before this node.

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

Syntax

'Declaration
Public Sub AddBeforeSelf ( _
    content As Object _
)

public void AddBeforeSelf(
    Object content
)

Parameters

  • content
    Type: System.Object
    A content object that contains simple content or a collection of content objects to be added before this node.

Exceptions

Exception Condition
InvalidOperationException

The parent is nulla null reference (Nothing in Visual Basic).

Remarks

For details about the valid content that can be passed to this function, see Valid Content of XElement and XDocument Objects in the .NET Framework documentation.

This method will raise the Changed and the Changing events.

Examples

The following example uses this method to add an element into the tree.

Dim output As New StringBuilder
Dim xmlTree As XElement = _
        <Root>
            <Child1>1</Child1>
            <Child2>2</Child2>
            <Child3>3</Child3>
            <Child4>4</Child4>
            <Child5>5</Child5>
        </Root>

Dim child1 As XElement = xmlTree.<Child1>(0)
child1.AddBeforeSelf(New XElement("NewChild", 10))
output.Append(xmlTree)
output.Append(Environment.NewLine)

OutputTextBlock.Text = output.ToString()

StringBuilder output = new StringBuilder();
XElement xmlTree = new XElement("Root",
    new XElement("Child1", 1),
    new XElement("Child2", 2),
    new XElement("Child3", 3),
    new XElement("Child4", 4),
    new XElement("Child5", 5)
);
XElement child1 = xmlTree.Element("Child1");
child1.AddBeforeSelf(
    new XElement("NewChild", 10)
);
output.Append(xmlTree + Environment.NewLine);

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.