XmlValidatingReader::HasValue Property

 

Gets a value indicating whether the current node can have a Value other than String.Empty.

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

public:
property bool HasValue {
	virtual bool get() override;
}

Property Value

Type: System::Boolean

true if the node on which the reader is currently positioned can have a Value; otherwise, false.

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The XmlValidatingReader class is obsolete in .NET Framework 2.0.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

The following table lists node types that have a value to return.

Node Type

Value

Attribute

The value of the attribute.

CDATA

The content of the CDATA section.

Comment

The content of the comment.

DocumentType

The internal subset.

ProcessingInstruction

The entire content, excluding the target.

SignificantWhitespace

The white space between markup in a mixed content model.

Text

The content of the text node.

Whitespace

The white space between markup.

XmlDeclaration

The content of the declaration.

The following example reads in XML with various data types and displays each of the nodes.

#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( "book1.xml" );
   txtreader->WhitespaceHandling = WhitespaceHandling::None;
   XmlValidatingReader^ reader = gcnew XmlValidatingReader( txtreader );
   reader->ValidationType = ValidationType::None;

   //Parse the file and each node and its value.
   while ( reader->Read() )
   {
      if ( reader->HasValue )
            Console::WriteLine( "({0})  {1}={2}", reader->NodeType, reader->Name, reader->Value );
      else
            Console::WriteLine( "({0}) {1}", reader->NodeType, reader->Name );
   }


   //Close the reader.
   reader->Close();
}

.NET Framework
Available since 1.1
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