Статья
11/18/2011

XDocument.Declaration Property

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

Gets or sets the XML declaration for this document.

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

Syntax

'Declaration
Public Property Declaration As XDeclaration

public XDeclaration Declaration { get; set; }

Property Value

Type: System.Xml.Linq.XDeclaration
An XDeclaration that contains the XML declaration for this document.

Remarks

Sometimes you have to create an XML declaration for a document. If you want to indicate that a document is standalone, you must use this property. If you want to encode your document with an encoding other than utf-8, you can specify an encoding through the XDeclaration. Another approach for encoding a document is to specify the encoding on an XmlWriter that you pass to LINQ to XML for writing.

Examples

The following example uses this property to retrieve the XML declaration of a document.

Dim output As New StringBuilder
Dim doc As XDocument = _
    <?xml version="1.0" encoding="utf-8" standalone="yes"?>
    <!--This is a comment-->
    <Root>content</Root>

output.Append(doc.Declaration)
output.Append(Environment.NewLine)

OutputTextBlock.Text = output.ToString()

StringBuilder output = new StringBuilder();
XDocument doc = new XDocument(
    new XDeclaration("1.0", "utf-8", "yes"),
    new XComment("This is a comment"),
    new XElement("Root", "content")
);

output.Append(doc.Declaration + 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.

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