The System.Xml.XmlWriter Class

Supported Versions

Public Members

Overview

XmlWriter is an abstract class that is implemented using the XmlTextWriter class. It provides the bulk of the members used by the XmlTextWriter class, and establishes an important part of the System.Xml library.

Example (VB.NET): How to pass an XmlTextWriter object to an XmlWriter declared parameter.

The following is a variation of the XmlTextWriter example. Here we create an XmlTextWriter object in one subroutine (Button1_Click), and then pass it to another routine (GetTheWriter) where it is received into the objXmlWriter parameter that is typed as an XmlWriter object. The XMLWriter object is then used to output the XML document content, using the WriteStartElement, WriteString, and WriteEndElement methods. An XmlTextReader is subsequently used to read in the document contents, which are then displayed with the XmlDocument.OuterXml property.

    Private Sub Button1_Click(...)

        Dim objXmlTextWriter As System.Xml.XmlTextWriter

        objXmlTextWriter = New XmlTextWriter("c:\newtest.xml", Nothing)

        GetTheWriter(objXmlTextWriter)

    End Sub

    Sub GetTheWriter(ByVal objXmlWriter As System.Xml.XmlWriter)

        Dim objXmlDocument As System.Xml.XmlDocument

        Dim objXmlTextReader As System.Xml.XmlTextReader

        objXmlWriter.WriteStartElement("sampleElement")

        objXmlWriter.WriteString("new value")

        objXmlWriter.WriteEndElement()

        objXmlWriter.Close()

        objXmlTextReader = New XmlTextReader("c:\newtest.xml")

        objXmlDocument = New System.Xml.XmlDocument

        objXmlDocument.Load(objXmlTextReader)

        TextBox1.Text = objXmlDocument.OuterXml

    End Sub