XmlDocument.Save Method (XmlWriter)

 

Saves the XML document to the specified XmlWriter.

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

Public Overridable Sub Save (
	w As XmlWriter
)

Parameters

w
Type: System.Xml.XmlWriter

The XmlWriter to which you want to save.

Exception Condition
XmlException

The operation would not result in a well formed XML document (for example, no document element or duplicate XML declarations).

White space is preserved only if PreserveWhitespace is set to true.

The encoding on the XmlWriter determines the encoding that is written out (The encoding of the XmlDeclaration node is replaced by the encoding of the XmlWriter). If there was no encoding specified on the XmlWriter, the XmlDocument is saved without an encoding attribute.

When the document is saved, xmlns attributes are generated to persist the node identity (LocalName + NamespaceURI) correctly. For example, the following C# code

XmlDocument doc = new XmlDocument();
doc.AppendChild(doc.CreateElement("item","urn:1"));
doc.Save(Console.Out);

generates this xmls attribute:

<item
    xmls="urn:1"/>

This method is a Microsoft extension to the Document Object Model (DOM).

Note that only the Save method enforces a well-formed XML document. All other Save overloads only guarantee a well-formed fragment.

The following example loads XML into an XmlDocument object and saves it out to a file.

Imports System
Imports System.Xml

public class Sample 

  public shared sub Main() 

    ' Create the XmlDocument.
    Dim doc as XmlDocument = new XmlDocument()
    doc.LoadXml("<item><name>wrench</name></item>")

   ' Add a price element.
   Dim newElem as XmlElement = doc.CreateElement("price")
   newElem.InnerText = "10.95"
   doc.DocumentElement.AppendChild(newElem)

   Dim settings As New XmlWriterSettings()
   settings.Indent = True
   ' Save the document to a file and auto-indent the output.
   Dim writer As XmlWriter = XmlWriter.Create("data.xml", settings)
    doc.Save(writer)
  end sub
end class

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
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