XmlTextReader.Value Eigenschap

public:
 virtual property System::String ^ Value { System::String ^ get(); };

public override string Value { get; }

member this.Value : string

Public Overrides ReadOnly Property Value As String

Waarde van eigenschap

De geretourneerde waarde is afhankelijk van het NodeType knooppunt. De volgende tabel bevat knooppunttypen die een waarde hebben die moet worden geretourneerd. Alle andere knooppunttypen retourneren String.Empty.

Voorbeelden

In het volgende voorbeeld wordt een XML-bestand gelezen en wordt elk knooppunt weergegeven.

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

public class Sample {

  private const String filename = "items.xml";

  public static void Main() {

     XmlTextReader reader = null;

     try {

        // Load the reader with the data file and ignore all white space nodes.
        reader = new XmlTextReader(filename);
        reader.WhitespaceHandling = WhitespaceHandling.None;

        // 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("<![CDATA[{0}]]>", 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.DocumentType:
               Console.Write("<!DOCTYPE {0} [{1}]", reader.Name, reader.Value);
               break;
             case XmlNodeType.EntityReference:
               Console.Write(reader.Name);
               break;
             case XmlNodeType.EndElement:
               Console.Write("</{0}>", reader.Name);
               break;
           }
        }
     }

     finally {
        if (reader!=null)
          reader.Close();
     }
  }
} // End class

Option Strict
Option Explicit

Imports System.IO
Imports System.Xml

'Reads an XML document
Public Class Sample
    Private Const filename As String = "items.xml"
    
    Public Shared Sub Main()
        Dim reader As XmlTextReader = Nothing
        
        Try
            ' Load the reader with the data file and ignore all white space nodes.         
            reader = New XmlTextReader(filename)
            reader.WhitespaceHandling = WhitespaceHandling.None
            
            ' 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("<![CDATA[{0}]]>", 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.DocumentType
                        Console.Write("<!DOCTYPE {0} [{1}]", reader.Name, reader.Value)
                    Case XmlNodeType.EntityReference
                        Console.Write(reader.Name)
                    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

In het voorbeeld wordt het bestand items.xmlgebruikt.

<?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 an char entity: A</Item>
  <!-- Fourteen chars in this element.-->
  <Item>1234567890ABCD</Item>
</Items>

Opmerkingen

Zie ook

• XmlReader