Tip

Reading and writing to an XML file

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ADO provides a rich infrastructure for interacting with a wide variety of data, including XML. With DataSets we can now read and write to an XML file with ease.

The following code sample demonstrates how to read and write to an XML file. We are going to read and write an XML file with the details as under: 

<?xml version="1.0" standalone="yes" ?> 

  <Detail>
    <Person>
      <Name>Manish</Name>
      <Age>22</Age>
 </Person>
</Detail>


Class : xml.vb

Imports System

Class WriteXML

    Shared Sub main()

      Dim objDataSet As New System.Data.DataSet()
      Dim strVirtualPath As String = "t.xml"

      'Load the XML file in the data set
      objDataSet.ReadXml("xmlfile.xml")

      'Read the XML content on the console
      Console.Write(objDataSet.GetXml)

      'Get data from the user to be saved in the XML file
      Console.Write("Enter Name : ")
      Dim fname, age As String
      fname = Console.ReadLine
      Console.Write("Enter Age : ")
      age = Console.ReadLine
      Console.Write(fname & age)
 
      Dim v(1) As String
      v(0) = fname
      v(1) = age

      'Add the data to the data set
      objDataSet.Tables(0).Rows.Add(v)

     'Write to updated data back to the XMl file
     objDataSet.WriteXml("xmlfile.xml")

     Console.Write(objDataSet.GetXml)
    End Sub
End Class


Compile the file as: 
vbc /r:system.dll /r:system.data.dll /r:system.xml.dll xml.vb

Source: DotNetExtreme.com

This was first published in June 2003

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