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How To Render DataTable Columns as XML Attributes Instead of Elements by Using Visual Basic .NET

This article was previously published under Q310345
For a Microsoft Visual C# .NET version of this article, see 311937.

This article refers to the following Microsoft .NET Framework Class Library namespaces:
  • System.Data
  • System.Data.SqlClient
  • System.Xml


This article demonstrates how to render DataTable columns as Extensible Markup Language (XML) attributes. A DataTable represents one table of in-memory relational data. You can create a DataTable and use it independently, or other Microsoft .NET Framework objects can use the DataTable, most commonly as a member of a DataSet object.

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The following list outlines the recommended hardware, software, networkinfrastructure, and service packs that you need:
  • Microsoft Windows XP, Windows 2000, or Windows NT 4.0 Service Pack 6a
  • Microsoft Visual Studio .NET
This article assumes that you are familiar with the following topics:
  • Visual Basic .NET syntax
  • Extensible Markup Language (XML)
  • ADO.NET fundamentals and syntax
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Steps to Create Visual Basic .NET Sample

  1. Start Microsoft Visual Studio .NET, and create a new Visual Basic Console Application project.
  2. Add the following code to the top of the Code window:
    Imports System.DataImports System.Data.SqlClient					
  3. Add the following code in the Sub Main procedure:
    Dim cnPubs As New SqlConnection("Data Source=<servername>;user id=<username>;" & _                                "password=<password>;Initial Catalog=Pubs;")Dim daAuthors As New SqlDataAdapter("Select * from Authors", cnPubs)Dim ds As New DataSet()cnPubs.Open()daAuthors.Fill(ds, "Authors")Dim dc As DataColumnFor Each dc In ds.Tables("Authors").Columns        dc.ColumnMapping = MappingType.AttributeNextds.WriteXml("c:\Authors.xml")Console.WriteLine("Completed writing XML file, using a DataSet")Console.Read()					
  4. Modify the SqlConnection string as appropriate for your environment.
  5. Press the F5 key to build and run the application. The message "Completed writing XML file, using a DataSet" appears in the Console window. Notice that the Authors.xml file is created in the specified location.
  6. Open Authors.xml. Notice that all of the columns are created as attributes for each row.
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Article ID: 310345 - Last Review: 07/14/2004 19:01:01 - Revision: 2.3

  • Microsoft ADO.NET 1.1
  • Microsoft ADO.NET 1.0
  • Microsoft Visual Basic .NET 2003 Standard Edition
  • Microsoft Visual Basic .NET 2002 Standard Edition
  • kbhowtomaster kbsystemdata KB310345