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• Microsoft Windows 2000 Professional, Windows 2000 Server, Windows 2000 ¢Ñé¹ÊÙ§à«ÔÃì¿àÇÍÃì ËÃ×Íà«ÔÃì¿àÇÍÃì Windows NT 4.0
• Microsoft Visual Studio .NET

• ¤ÓÈѾ·ì xml
• ¡ÒÃÊÃéÒ§áÅÐÍèÒ¹ XML

ÇÔ¸Õ¡Ò÷ÕèÍèÒ¹¢éÍÁÙÅ XML ¨Ò¡µÑÇ¡ÃÐáÊ¢éÍÁÙÅ

1. à»Ô´ Visual Studio .NET
2. ÊÃéÒ§ãËÁè Microsoft Visual Basic (VB) ËÃ×Í Microsoft Visual c# ¤Í¹â«Åâ»Ãá¡ÃÁ»ÃÐÂØ¡µì
   
   ËÁÒÂà˵Ø:: ¢Ñ鹵͹µèÍ仹Õé¡ÒÃãÊè¤Ó͸ԺÒÂâ´ÂÅÐàÍÕ´à¡ÕèÂǡѺÇÔ¸Õ¡ÒÃÊÃéÒ§â»Ãá¡ÃÁ»ÃÐÂØ¡µì ¤Ø³ÊÒÁÒö¨Ð仵ç¢Ñ鹵͹·Õè 10 «Öè§ÁÕãËéÃËÑÊ·ÕèàÊÃç¨ÊÁºÙóì
3. µÃǨÊͺãËéá¹èã¨ÇèÒ â¤Ã§¡Ò÷Õè»ÃСͺ´éÇ¡ÒÃÍéÒ§ÍÔ§ä»ÂѧSystem.XmláÅÐSystem.IOnamespace
4. ãªé¤ÓÊÑ觹Óà¢éÒXMLnamespace ´Ñ§¹Ñ鹤سäÁè¨Óà»ç¹µéͧ¡Ó˹´¤Ø³ÊÁºÑµÔXmlTextReaderdeclarations ã¹ namespace ¹Ñé¹ã¹ÀÒÂËÅѧã¹ÃËÑʢͧ¤Ø³ ¤Ø³µéͧãªé¤ÓÊÑ觹Óà¢éÒ¡è͹·Õè¨Ð declarations Í×è¹ æ µèÍ仹Õé:
   â¤é´ visual Basic .NET

   Imports System.Xml
   Imports System.IO
   						

   áÊ´§ÃËÑÊ c#

   using System.Xml;
   using System.IO;
   						

5. ÊÃéÒ§ ËÃ×ÍàÃÕ¡¡ÃÐáÊ¢éÍÁÙÅ XML ¡ÃÐáÊ¢éÍÁÙÅẺäÁèÁÕ¡ÒÃáÊ´§¢Í§¡Òûé͹¢éÍÁÙÅ ËÃ×ÍÍØ»¡Ã³ìáÊ´§¼Å·Õèà»ç¹áËÅ觷ÕèÁҢͧ ËÃ×Í»ÅÒ·ҧÊÓËÃѺ ¢éÍÁÙÅ (㹡óչÕé ¢éÍÁÙÅ XML) abstract ¤Ø³ÊÒÁÒöà¢Õ¹ áÅÐÍèÒ¹¨Ò¡¡ÃÐáÊ¢éÍÁÙÅẺ «Öè§ visualized ÁÒ¡·ÕèÊØ´à»ç¹ÅӴѺ亵ì
   
   ¡ÃÐáÊ¢éÍÁÙŶ١ãªéà¾×èÍãËé independence ¨Ò¡ÍØ»¡Ã³ì áÅеéͧÁÕ¡ÒÃà»ÅÕè¹á»Å§â»Ãá¡ÃÁ´Ñ§¹Ñé¹ ¶éÒ µÑÇÍÂèÒ§àªè¹ ¡ÒÃà»ÅÕè¹á»Å§¢Í§áËÅ觷ÕèÁҢͧ¡ÃÐáÊ¢éÍÁÙÅ ÁÕÇÔ¸Õ·ÕèᵡµèÒ§¡Ñ¹à¾Õ§äÁè¡Õèà¾×èÍÊÃéÒ§¡ÃÐáÊ¢éÍÁÙÅÊÓËÃѺ¡ÒÃXmlTextReader¤ÅÒÊ·Õè àÅ×Í¡µÑÇÍÂèÒ§ÃËÑʵèÍ仹Õéà¾×èÍà¾ÔèÁŧ㹡Ãкǹ¡ÒÃËÅÑ¡¢Í§âÁ´ÙÅ·Õèà»ç¹¤èÒàÃÔèÁµé¹ÍÂèÒ§ã´ÍÂèҧ˹Öè§:
   • µÑÇÍÂèÒ§ÃËÑÊ·Õèãªé㹡ÒÃStringReaderÇѵ¶Ø:
     
     ¡Ãкǹ¡ÒÃStringReaderÇѵ¶ØÍèÒ¹ÍÑ¡¢ÃШҡÊÒÂÍÑ¡¢ÃÐ áÅÐãªé¤èÒÊÒÂÍÑ¡¢ÃÐã¹ÃÐËÇèÒ§¡ÒôÓà¹Ô¹¡ÒÃvisual Basic .NET ÃËÑÊ

     Dim stream as System.IO.StringReader
     stream = new StringReader("<?xml version='1.0'?>" & _
     "<!-- This file is a book store inventory. -->" & _
     "<bookstore>" & _
     " <book genre=""autobiography"" ISBN=""1-861003-11-0"">" & _
     "   <title>The Autobiography of Benjamin Franklin</title>" & _
     "   <author>" & _
     "       <first-name>Benjamin</first-name>" & _
     "       <last-name>Franklin</last-name>" & _
     "   </author>" & _
     "   <price>8.99</price>" & _
     " </book>" & _
     "</bookstore>")
     						

     ÃËÑÊ c#

     StringReader stream;
     stream = new StringReader("<?xml version='1.0'?>" +
     	"<!-- This file represents a fragment of a book store inventory database. -->" +
     	"<bookstore>" +
     	" <book genre=\"autobiography\" publicationdate=\"1981\" ISBN=\"1-861003-11-0\">" +
     	"   <title>The Autobiography of Benjamin Franklin</title>" +
     	"   <author>" +
     	"       <first-name>Benjamin</first-name>" +
     	"       <last-name>Franklin</last-name>" +
     	"   </author>" +
     	"   <price>8.99</price>" +
     	" </book>" +
     	" <book genre=\"novel\" publicationdate=\"1967\" ISBN=\"0-201-63361-2\">" +
     	"   <title>The Confidence Man</title>" +
     	"   <author>" +
     	"       <first-name>Herman</first-name>" +
     	"       <last-name>Melville</last-name>" +
     	"   </author>" +
     	"   <price>11.99</price>" +
     	" </book>" +
     	"  <book genre=\"philosophy\" publicationdate=\"1991\" ISBN=\"1-861001-57-6\">" +
     	"   <title>The Gorgias</title>" +
     	"   <author>" +
     	"       <name>Plato</name>" +
     	"   </author>" +
     	"   <price>9.99</price>" +
     	" </book>" +
     	"</bookstore>");
     						

   • µÑÇÍÂèÒ§ÃËÑÊ·Õèãªé㹡ÒÃStreamReaderÇѵ¶Ø:
     
     ¡Ãкǹ¡ÒÃStreamReaderÇѵ¶Ø¶Ù¡ãªé㹡ÒÃÍèÒ¹ÍÑ¡¢ÃШҡá¿éÁ Íèҹ㹪×èÍä¿Åì¨ÐÍèÒ¹ã¹ÃÐËÇèÒ§¡ÒôÓà¹Ô¹¡ÒÃ:visual Basic .NET ÃËÑÊ

     Dim stream as System.IO.StreamReader
     ' Loads the XML data in the file books.xml in a new stream.
     stream = New StreamReader ("books.xml")
     						

     ÃËÑÊ c#

     System.IO.StreamReader stream = new System.IO.StreamReader ("books.xml");
     						

     â»Ã´ÊѧࡵÇèÒ á¿éÁ Books.xml ¶Ù¡ãªéµèÍ仹Õé ¤Ø³ÊÒÁÒöÊÃéÒ§á¿éÁ¢Í§¤Ø³àͧ Books.xml á¿éÁ Books.xml µÑÇÍÂèÒ§¨ÐÂѧÁÕ¡ÒèѴÊè§ â´Âãªé Visual Studio .Net áÅÐã¹.Net Framework SDK
     
     
6. ÊÃéÒ§¢éÍXmlTextReader¤ÅÒÊ·Õè ÁÕ¡ÃÐáÊ¢éÍÁÙÅ â´Â·ÑèÇä»XmlTextReaderãªé¶éҤسµéͧ¡ÒÃà¢éÒ¶Ö§ XML à»ç¹¢éÍÁÙÅ´Ôºâ´ÂäÁèÁÕ¤èÒ¼ÅÔµ¢Í§¡ÒÃàÍ¡ÊÒÃÇѵ¶ØẺ¨ÓÅͧ (DOM); ´Ñ§¹Ñé¹XmlTextReaderáÊ´§¡Åä¡·ÕèàÃçÇ¢Öé¹ÊÓËÃѺ¡ÒÃÍèÒ¹ XMLXmlTextReaderÁÕ constructors µèÒ§ æ à¾×èÍÃкصÓá˹觷ÕèµÑ駢ͧ XML ¢éÍÁÙÅ ÃËÑʵèÍ仹ÕéâËÅ´XmlTextReader¨Ò¡¡ÃÐáÊ¢éÍÁÙÅ:
   visual Basic .NET ÃËÑÊ

   Dim reader As XmlTextReader = New XmlTextReader (stream)
   						

   ÃËÑÊ c#

   XmlTextReader reader = null;	
   reader = new XmlTextReader (stream);
   						

7. ÍèÒ¹¼èÒ¹ XML âËÅ´¤ÃÑé§XmlTextReader´Óà¹Ô¹¡ÒÃÍèÒ¹µÒÁÅӴѺà¾×èÍÂéÒÂä»Âѧ¢éÍÁÙÅ XML áÅÐãªé¡ÒÃReadÇÔ¸Õ¡ÒÃàÃÕ¡ãªéÃÐàºÕ¹¶Ñ´ä» ¤Ø³¡ÅѺà·ç¨¶éÒäÁèÁÕàÃ硤ÍÃìäÁèÁÕ
   visual Basic .NET ÃËÑÊ

   Do While (reader.Read())
       ' Do some work here on the data.
       Console.WriteLine(reader.Name)
   Loop
   
   ' Reading of the XML file has finished.
   Console.ReadLine() 'Pause
   						

   ÃËÑÊ c#

   while (reader.Read()) 
   {
       // Do some work here on the data.
       ...
   }
   
   while (reader.Read()) 
   {
       // Do some work here on the data.
   	Console.WriteLine(reader.Name);
   }
   Console.ReadLine();
   						

8. µÃǨÊͺâ˹´ ¡ÒûÃÐÁÇżŢéÍÁÙÅ XML áµèÅÐÃÐàºÕ¹ÁÕª¹Ô´à»ç¹â˹ «Öè§ÊÒÁÒö¶Ù¡¡Ó˹´¨Ò¡NodeType¤Ø³ÊÁºÑµÔ ¡Ãкǹ¡Òê×èÍ:áÅФèÒproperties return the node name (the element and attribute names) and the node value (the node text) of the current node (or record). ¡Ãкǹ¡ÒÃNodeTypeÃкØà»ç¹µÑÇ¡Ó˹´ª¹Ô´¢Í§â˹´ The following example displays the name of the elements and the document type. Note that this example ignores element attributes.
   visual Basic .NET ÃËÑÊ

   Do While (reader.Read())
   Select Case reader.NodeType
   Case XmlNodeType.Element 'Display beginning of element.
   Console.Write("<" + reader.Name)
   Console.WriteLine(">")
   Case XmlNodeType.Text 'Display the text in each element.
   Console.WriteLine(reader.Value)
   Case XmlNodeType.EndElement 'Display end of element.
   Console.Write("</" + reader.Name)
   Console.WriteLine(">")
   End Select
   Loop
   						

   ÃËÑÊ c#

   while (reader.Read()) 
   {
       switch (reader.NodeType) 
       {
           case XmlNodeType.Element: // The node is an Element.
               Console.Write("<" + reader.Name);
      Console.WriteLine(">");
               break;
     case XmlNodeType.Text: //Display the text in each element.
               Console.WriteLine (reader.Value);
               break;
     case XmlNodeType. EndElement: //Display end of element.
               Console.Write("</" + reader.Name);
      Console.WriteLine(">");
               break;
       }
   }
   						

9. µÃǨÊͺá͵·ÃÔºÔǵì Element node types can include a list of attribute nodes that are associated with them. ¡Ãкǹ¡ÒÃMovetoNextAttributeÇÔ¸ÕÂéÒ¶֧áµèÅÐá͵·ÃÔºÔǵìã¹Í§¤ì»ÃСͺµÒÁÅӴѺ ãªéẺHasAttributes¤Ø³ÊÁºÑµÔ¡Ò÷´ÊͺÇèÒâ˹´·ÕèÁÕá͵·ÃÔºÔǵìã´ æ ¡Ãкǹ¡ÒÃAttributeCount¤Ø³ÊÁºÑµÔÊ觡ÅѺ¨Ó¹Ç¹¢Í§á͵·ÃÔºÔǵìÊÓËÃѺâ˹´»Ñ¨¨ØºÑ¹
   visual Basic .NET ÃËÑÊ

   Do While (reader.Read())
   Select Case reader.NodeType
   Case XmlNodeType.Element 'Display beginning of element.
   Console.Write("<" + reader.Name)
            If reader.HasAttributes Then 'If attributes exist
            	While reader.MoveToNextAttribute() 
   					'Display attribute name and value.
   Console.Write(" {0}='{1}'", reader.Name, reader.Value)
   End While
   End If
   Console.WriteLine(">")
   Case XmlNodeType.Text 'Display the text in each element.
   Console.WriteLine(reader.Value)
   Case XmlNodeType.EndElement 'Display end of element.
   Console.Write("</" + reader.Name)
   Console.WriteLine(">")
   End Select
   Loop
   						

   ÃËÑÊ c#

   while (reader.Read()) 
   {
       switch (reader.NodeType) 
       {
           case XmlNodeType.Element: // The node is an Element.
               Console.Write("<" + reader.Name);
   
               while (reader.MoveToNextAttribute()) // Read attributes.
                   Console.Write(" " + reader.Name + "='" + reader.Value + "'");
               Console.Write(">");
      Console.WriteLine(">");
               break;
     case XmlNodeType.Text: //Display the text in each element.
               Console.WriteLine (reader.Value);
               break;
     case XmlNodeType. EndElement: //Display end of element.
               Console.Write("</" + reader.Name);
      Console.WriteLine(">");
               break;
       }
   }
   						

   
   
10. Completed code is provided here for your convenience.
    Visual Basic.Net code
    

    Imports System.Xml
    Imports System.IO
    Module Module1
    
        Sub Main()
            Dim stream As System.IO.StreamReader
            ' Loads the XML data in the file books.xml in a new stream.
            stream = New StreamReader("books.xml")
            Dim reader As XmlTextReader = New XmlTextReader(stream)
            Do While (reader.Read())
                Select Case reader.NodeType
                    Case XmlNodeType.Element 'Display beginning of element.
                        Console.Write("<" + reader.Name)
                        If reader.HasAttributes Then 'If attributes exist
                            While reader.MoveToNextAttribute()
                                'Display attribute name and value.
                                Console.Write(" {0}='{1}'", reader.Name, reader.Value)
                            End While
                        End If
                        Console.WriteLine(">")
                    Case XmlNodeType.Text 'Display the text in each element.
                        Console.WriteLine(reader.Value)
                    Case XmlNodeType.EndElement 'Display end of element.
                        Console.Write("</" + reader.Name)
                        Console.WriteLine(">")
                End Select
            Loop
        End Sub
    
    End Module
    						

    
    ÃËÑÊ c#
    

    using System;
    using System.Xml;
    using System.IO;
    namespace ReadXMLFromStream
    {
    	/// <summary>
    	/// Summary description for Class1.
    	/// </summary>
    	class Class1
    	{
    		static void Main(string[] args)
    		{
    
    			System.IO.StreamReader stream = new System.IO.StreamReader ("books.xml");
    			XmlTextReader reader = null;	
    			reader = new XmlTextReader (stream);
    			while (reader.Read()) 
    			{
    				switch (reader.NodeType) 
    				{
    					case XmlNodeType.Element: // The node is an Element.
    						Console.Write("<" + reader.Name);
    
    						while (reader.MoveToNextAttribute()) // Read attributes.
    							Console.Write(" " + reader.Name + "='" + reader.Value + "'");
    						Console.Write(">");
    						Console.WriteLine(">");
    						break;
    					case XmlNodeType.Text: //Display the text in each element.
    						Console.WriteLine (reader.Value);
    						break;
    					case XmlNodeType. EndElement: //Display end of element.
    						Console.Write("</" + reader.Name);
    						Console.WriteLine(">");
    						break;
    				}
    			}
    
    		}
    	}
    }
    
    						

11. Build and Run your project.

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