XmlNodeReader.Close Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Changes the ReadState to Closed
.
public:
override void Close();
public override void Close ();
override this.Close : unit -> unit
Public Overrides Sub Close ()
Examples
The following example parses a file and closes the reader.
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
String^ filename = "items.xml";
XmlNodeReader^ reader = nullptr;
try
{
//Create an XmlNodeReader to read the XmlDocument.
XmlDocument^ doc = gcnew XmlDocument;
doc->Load( filename );
reader = gcnew XmlNodeReader( doc );
//Parse the file and display each of the nodes.
while ( reader->Read() )
{
switch ( reader->NodeType )
{
case XmlNodeType::Element:
Console::Write( "<{0}>", reader->Name );
break;
case XmlNodeType::Text:
Console::Write( reader->Value );
break;
case XmlNodeType::CDATA:
Console::Write( reader->Value );
break;
case XmlNodeType::ProcessingInstruction:
Console::Write( "<?{0} {1}?>", reader->Name, reader->Value );
break;
case XmlNodeType::Comment:
Console::Write( "<!--{0}-->", reader->Value );
break;
case XmlNodeType::XmlDeclaration:
Console::Write( "<?xml version='1.0'?>" );
break;
case XmlNodeType::Document:
break;
case XmlNodeType::EndElement:
Console::Write( "</{0}>", reader->Name );
break;
}
}
}
finally
{
if ( reader != nullptr )
reader->Close();
}
}
using System;
using System.IO;
using System.Xml;
public class Sample
{
private const String filename = "items.xml";
public static void Main()
{
XmlNodeReader reader = null;
try
{
//Create an XmlNodeReader to read the XmlDocument.
XmlDocument doc = new XmlDocument();
doc.Load(filename);
reader = new XmlNodeReader(doc);
//Parse the file and display each of the nodes.
while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
Console.Write("<{0}>", reader.Name);
break;
case XmlNodeType.Text:
Console.Write(reader.Value);
break;
case XmlNodeType.CDATA:
Console.Write(reader.Value);
break;
case XmlNodeType.ProcessingInstruction:
Console.Write("<?{0} {1}?>", reader.Name, reader.Value);
break;
case XmlNodeType.Comment:
Console.Write("<!--{0}-->", reader.Value);
break;
case XmlNodeType.XmlDeclaration:
Console.Write("<?xml version='1.0'?>");
break;
case XmlNodeType.Document:
break;
case XmlNodeType.EndElement:
Console.Write("</{0}>", reader.Name);
break;
}
}
}
finally
{
if (reader!=null)
reader.Close();
}
}
} // End class
Imports System.IO
Imports System.Xml
Public Class Sample
Private Const filename As String = "items.xml"
Public Shared Sub Main()
Dim reader As XmlNodeReader = Nothing
Try
'Create an XmlNodeReader to read the XmlDocument.
Dim doc As New XmlDocument()
doc.Load(filename)
reader = New XmlNodeReader(doc)
'Parse the file and display each of the nodes.
While reader.Read()
Select Case reader.NodeType
Case XmlNodeType.Element
Console.Write("<{0}>", reader.Name)
Case XmlNodeType.Text
Console.Write(reader.Value)
Case XmlNodeType.CDATA
Console.Write(reader.Value)
Case XmlNodeType.ProcessingInstruction
Console.Write("<?{0} {1}?>", reader.Name, reader.Value)
Case XmlNodeType.Comment
Console.Write("<!--{0}-->", reader.Value)
Case XmlNodeType.XmlDeclaration
Console.Write("<?xml version='1.0'?>")
Case XmlNodeType.Document
Case XmlNodeType.EndElement
Console.Write("</{0}>", reader.Name)
End Select
End While
Finally
If Not (reader Is Nothing) Then
reader.Close()
End If
End Try
End Sub
End Class
The example uses the file, items.xml
, as input.
<?xml version="1.0"?>
<!-- This is a sample XML document -->
<!DOCTYPE Items [<!ENTITY number "123">]>
<Items>
<Item>Test with an entity: &number;</Item>
<Item>test with a child element <more/> stuff</Item>
<Item>test with a CDATA section <![CDATA[<456>]]> def</Item>
<Item>Test with a char entity: A</Item>
<!-- Fourteen chars in this element.-->
<Item>1234567890ABCD</Item>
</Items>
Remarks
Note
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.
This method also releases any resources held while reading. If Close
has already been called, no action is performed.
Applies to
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