XmlValidatingReader.BaseURI Property

 

Gets the base URI of the current node.

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

Public Overrides ReadOnly Property BaseURI As String

Property Value

Type: System.String

The base URI of the current node.

System_CAPS_noteNote

The XmlValidatingReader class is obsolete in .NET Framework 2.0. You can create a validating XmlReader instance by using the XmlReaderSettings class and the Create method. For more information, see the Remarks section of the XmlReader reference page.

A networked XML document is comprised of chunks of data aggregated by using various World Wide Web Consortium (W3C) standard inclusion mechanisms and therefore contains nodes that come from different places. document type definition (DTD) entities are an example of this, but this is not limited to DTDs. The base URI tells you where these nodes came from. If there is no base URI for the nodes being returned (for example, they were parsed from an in-memory string), String.Empty is returned.

The following example parses a file and displays the base URI of each node.

Option Strict
Option Explicit

Imports System
Imports System.IO
Imports System.Xml

Public Class Sample

   Public Shared Sub Main()
      Dim reader As XmlValidatingReader = Nothing
      Dim txtreader As XmlTextReader = Nothing

      Try
         'Create the validating reader.
         txtreader = New XmlTextReader("http://localhost/uri.xml")
         reader = New XmlValidatingReader(txtreader)
         reader.ValidationType = ValidationType.None

         'Parse the file and display the base URI for each node.
         While reader.Read()
            Console.WriteLine("({0}) {1}", reader.NodeType, reader.BaseURI)
         End While

      Finally
         If Not (reader Is Nothing) Then
            reader.Close()
         End If
      End Try
   End Sub 'Main ' End class
End Class 'Sample 

The example uses the file, uri.xml, as input.


<!-- XML fragment -->
<!DOCTYPE book [<!ENTITY s SYSTEM "tmp/style.xml">]>
<book genre="novel">
  <title>Pride And Prejudice</title>
  <misc>&s;</misc>
</book>

The style.xml file contains the XML text <style>hardcover</style>.

.NET Framework
Available since 1.1
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