XmlValidatingReader.GetAttribute Method

Definition

Namespace:

System.Xml

Assembly:

System.Xml.ReaderWriter.dll

Gets the value of an attribute.

Overloads

GetAttribute(Int32)	Gets the value of the attribute with the specified index.
GetAttribute(String)	Gets the value of the attribute with the specified name.
GetAttribute(String, String)	Gets the value of the attribute with the specified local name and namespace Uniform Resource Identifier (URI).

GetAttribute(Int32)

Source:

XmlValidatingReader.cs

Gets the value of the attribute with the specified index.

public:
 override System::String ^ GetAttribute(int i);

public override string GetAttribute (int i);

override this.GetAttribute : int -> string

Public Overrides Function GetAttribute (i As Integer) As String

Parameters

i

Int32

The index of the attribute. The index is zero-based. (The first attribute has index 0.)

Returns

String

The value of the specified attribute.

Exceptions

ArgumentOutOfRangeException

The i parameter is less than 0 or greater than or equal to AttributeCount.

Remarks

This method does not move the reader.

Note

The XmlValidatingReader class is obsolete in .NET Framework 2.0.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.

See also

• XmlReader

GetAttribute(String)

Source:

XmlValidatingReader.cs

Gets the value of the attribute with the specified name.

public:
 override System::String ^ GetAttribute(System::String ^ name);

public override string? GetAttribute (string name);

override this.GetAttribute : string -> string

Public Overrides Function GetAttribute (name As String) As String

Parameters

name

String

The qualified name of the attribute.

Returns

String

The value of the specified attribute. If the attribute is not found, null is returned.

Examples

The following example gets the value of the ISBN attribute.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   
   //Create the validating reader.
   XmlTextReader^ txtreader = gcnew XmlTextReader( "attrs.xml" );
   XmlValidatingReader^ reader = gcnew XmlValidatingReader( txtreader );
   
   //Read the ISBN attribute.
   reader->MoveToContent();
   String^ isbn = reader->GetAttribute( "ISBN" );
   Console::WriteLine( "The ISBN value: {0}", isbn );
   
   //Close the reader.
   reader->Close();
}

using System;
using System.IO;
using System.Xml;

public class Sample
{
  public static void Main()
  {

    //Create the validating reader.
    XmlTextReader txtreader = new XmlTextReader("attrs.xml");
    XmlValidatingReader reader = new XmlValidatingReader(txtreader);

    //Read the ISBN attribute.
    reader.MoveToContent();
    string isbn = reader.GetAttribute("ISBN");
    Console.WriteLine("The ISBN value: " + isbn);

    //Close the reader.
    reader.Close();
  }
} // End class

Imports System.IO
Imports System.Xml

public class Sample 

  public shared sub Main()

    'Create the validating reader.
    Dim txtreader as XmlTextReader = new XmlTextReader("attrs.xml")
    Dim reader as XmlValidatingReader = new XmlValidatingReader(txtreader)

    'Read the ISBN attribute.
    reader.MoveToContent()
    Dim isbn as string = reader.GetAttribute("ISBN")
    Console.WriteLine("The ISBN value: " + isbn)

    'Close the reader.
    reader.Close()

  End sub
End class 

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

<book genre='novel' ISBN='1-861003-78' pubdate='1987'>
</book>

Remarks

Note

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.

This method does not move the reader.

If the reader is positioned on a DocumentType node, this method can be used to get the PUBLIC and SYSTEM literals, for example, reader.GetAttribute("PUBLIC")

See also

• XmlReader

GetAttribute(String, String)

Source:

XmlValidatingReader.cs

Gets the value of the attribute with the specified local name and namespace Uniform Resource Identifier (URI).

public:
 override System::String ^ GetAttribute(System::String ^ localName, System::String ^ namespaceURI);

public override string? GetAttribute (string localName, string? namespaceURI);

override this.GetAttribute : string * string -> string

Public Overrides Function GetAttribute (localName As String, namespaceURI As String) As String

Parameters

localName

String

The local name of the attribute.

namespaceURI

String

The namespace URI of the attribute.

Returns

String

The value of the specified attribute. If the attribute is not found, null is returned. This method does not move the reader.

Remarks

Note

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.

The following XML contains an attribute in a specific namespace:

<test xmlns:dt="urn:datatypes" dt:type="int"/>

You can look up the dt:type attribute by using one argument (prefix and local name) or two arguments (local name and namespace URI):

String dt = reader.GetAttribute("dt:type");
String dt2 = reader.GetAttribute("type","urn:datatypes");

To look up the xmlns:dt attribute, use one of the following arguments:

String dt3 = reader.GetAttribute("xmlns:dt");
String dt4 = reader.GetAttribute("dt",http://www.w3.org/2000/xmlns/);

You can also get this information by using the Prefix property.

See also

• XmlReader