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XDocumentType Constructor (String, String, String, String)

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

Initializes an instance of the XDocumentType class.

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

Syntax

'Declaration
Public Sub New ( _
    name As String, _
    publicId As String, _
    systemId As String, _
    internalSubset As String _
)

public XDocumentType(
    string name,
    string publicId,
    string systemId,
    string internalSubset
)

Parameters

  • name
    Type: System.String
    A String that contains the qualified name of the DTD, which is the same as the qualified name of the root element of the XML document.
  • publicId
    Type: System.String
    A String that contains the public identifier of an external public DTD.
  • systemId
    Type: System.String
    A String that contains the system identifier of an external private DTD.
  • internalSubset
    Type: System.String
    A String that contains the internal subset for an internal DTD.

Examples

The following example creates a document with an internal DTD. When it creates the XDocumentType object, it specifies the qualified name of the DTD (Pubs), and a string that contains the internal subset. Because the document does not use a public or private external DTD, the publicId and systemId are set to nulla null reference (Nothing in Visual Basic).

Dim output As New StringBuilder
Dim internalSubset = _
    "<!ELEMENT Pubs (Book+)>" & Environment.NewLine & _
    "<!ELEMENT Book (Title, Author)>" & Environment.NewLine & _
    "<!ELEMENT Title (#PCDATA)>" & Environment.NewLine & _
    "<!ELEMENT Author (#PCDATA)>"

Dim doc As XDocument = _
    <?xml version="1.0" encoding="utf-8" standalone="yes"?>
    <!--This is a comment.-->
    <?xml-stylesheet href="mystyle.css" title="Compact" type="text/css"?>
    <Pubs>
        <Book>
            <Title>Artifacts of Roman Civilization</Title>
            <Author>Moreno, Jordao</Author>
        </Book>
        <Book>
            <Title>Midieval Tools and Implements</Title>
            <Author>Gazit, Inbar</Author>
        </Book>
    </Pubs>
    <!--This is another comment.-->

doc.FirstNode.NextNode.AddAfterSelf(New XDocumentType("Pubs", Nothing, Nothing, internalSubset))

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

OutputTextBlock.Text = output.ToString()

    StringBuilder output = new StringBuilder();
    string internalSubset = @"<!ELEMENT Pubs (Book+)>
<!ELEMENT Book (Title, Author)>
<!ELEMENT Title (#PCDATA)>
<!ELEMENT Author (#PCDATA)>";

    string target = "xml-stylesheet";
    string data = "href=\"mystyle.css\" title=\"Compact\" type=\"text/css\"";

    XDocument doc = new XDocument(
        new XComment("This is a comment."),
        new XProcessingInstruction(target, data),
        new XDocumentType("Pubs", null, null, internalSubset),
        new XElement("Pubs",
            new XElement("Book",
                new XElement("Title", "Artifacts of Roman Civilization"),
                new XElement("Author", "Moreno, Jordao")
            ),
            new XElement("Book",
                new XElement("Title", "Midieval Tools and Implements"),
                new XElement("Author", "Gazit, Inbar")
            )
        ),
        new XComment("This is another comment.")
    );
    doc.Declaration = new XDeclaration("1.0", "utf-8", "true");

    output.Append(doc + 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.