XmlNodeReader::HasValue Property
Gets a value indicating whether the current node can have a Value.
Assembly: System.Xml (in System.Xml.dll)
Property Value
Type: System::Booleantrue if the node on which the reader is currently positioned can have a Value; otherwise, false.
Note |
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In the .NET Framework 2.0, the recommended practice is to create XmlReader instances using the XmlReaderSettings class and the Create method. This allows you to take full advantage of all the new features introduced in the .NET Framework. For more information, see the Remarks section in 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 displays the value for every node which can have a value.
#using <System.Xml.dll> using namespace System; using namespace System::IO; using namespace System::Xml; int main() { XmlNodeReader^ reader = nullptr; try { // Create and load an XmlDocument. XmlDocument^ doc = gcnew XmlDocument; doc->LoadXml( "<?xml version='1.0' ?>" "<!DOCTYPE book [<!ENTITY h 'hardcover'>]>" "<book>" "<title>Pride And Prejudice</title>" "<misc>&h;</misc>" "</book>" ); reader = gcnew XmlNodeReader( doc ); // Parse the file and display each node. 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 ); } } finally { if ( reader != nullptr ) reader->Close(); } }
Available since 1.1
