XmlDataDocument.DataSet Property

Definition

Namespace:

System.Xml

Assembly:

System.Data.Common.dll

Source:

XmlDataDocument.cs

Gets a DataSet that provides a relational representation of the data in the XmlDataDocument.

public:
 property System::Data::DataSet ^ DataSet { System::Data::DataSet ^ get(); };

public System.Data.DataSet DataSet { get; }

member this.DataSet : System.Data.DataSet

Public ReadOnly Property DataSet As DataSet

Property Value

DataSet

A DataSet that can be used to access the data in the XmlDataDocument using a relational model.

Examples

The following example modifies the price of a book using the DataSet methods.

#using <System.dll>
#using <System.Xml.dll>
#using <System.Data.dll>

using namespace System;
using namespace System::Data;
using namespace System::Xml;

int main()
{
   
   //Create an XmlDataDocument.
   XmlDataDocument^ doc = gcnew XmlDataDocument;
   
   //Load the schema file.
   doc->DataSet->ReadXmlSchema( "store.xsd" );
   
   //Load the XML data.
   doc->Load( "2books.xml" );
   
   //Update the price on the first book using the DataSet methods.
   DataTable^ books = doc->DataSet->Tables[ "book" ];
   books->Rows[ 0 ][ "price" ] = "12.95";
   Console::WriteLine( "Display the modified XML data..." );
   doc->Save( Console::Out );
}

using System;
using System.Data;
using System.Xml;

public class Sample
{
  public static void Main()
  {
     //Create an XmlDataDocument.
     XmlDataDocument doc = new XmlDataDocument();

     //Load the schema file.
     doc.DataSet.ReadXmlSchema("store.xsd");

     //Load the XML data.
     doc.Load("2books.xml");

     //Update the price on the first book using the DataSet methods.
     DataTable books = doc.DataSet.Tables["book"];
     books.Rows[0]["price"] = "12.95";

     Console.WriteLine("Display the modified XML data...");
     doc.Save(Console.Out);
  }
} // End class

imports System.Data
imports System.Xml

public class Sample

  public shared sub Main()

    'Create an XmlDataDocument.
    Dim doc as XmlDataDocument = new XmlDataDocument()

    'Load the schema.
    doc.DataSet.ReadXmlSchema("store.xsd") 
 
    'Load the XML data.
    doc.Load("2books.xml")

    'Change the price on the first book using the DataSet methods.
    Dim books as DataTable = doc.DataSet.Tables.Item("book")
    books.Rows.Item(0).Item("price") = "12.95" 

    Console.WriteLine("Display the modified XML data...")
    doc.Save(Console.Out)

  end sub
end class

The example uses the following two files as input.

2books.xml

<!--sample XML fragment-->
<bookstore>
  <book genre='novel' ISBN='10-861003-324'>
    <title>The Handmaid's Tale</title>
    <price>19.95</price>
  </book>
  <book genre='novel' ISBN='1-861001-57-5'>
    <title>Pride And Prejudice</title>
    <price>24.95</price>
  </book>
</bookstore>

store.xsd

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

 <xsd:element name="bookstore" type="bookstoreType"/>

 <xsd:complexType name="bookstoreType">
  <xsd:sequence maxOccurs="unbounded">
   <xsd:element name="book"  type="bookType"/>
  </xsd:sequence>
 </xsd:complexType>

 <xsd:complexType name="bookType">
  <xsd:sequence>
   <xsd:element name="title" type="xsd:string"/>
   <xsd:element name="author" type="authorName"/>
   <xsd:element name="price"  type="xsd:decimal"/>
  </xsd:sequence>
  <xsd:attribute name="genre" type="xsd:string"/>
 </xsd:complexType>

 <xsd:complexType name="authorName">
  <xsd:sequence>
   <xsd:element name="first-name"  type="xsd:string"/>
   <xsd:element name="last-name" type="xsd:string"/>
  </xsd:sequence>
 </xsd:complexType>

</xsd:schema>

Remarks

The DataSet enables you to access the data in the XmlDataDocument using a relational model. This means that you can handle the data as tables and views, rows and columns, relations, and so on. Changes made in the DataSet are immediately visible in the XmlDataDocument.

See also

• DataSet
• DataTable