XmlNodeReader.MoveToFirstAttribute 方法

定義

命名空間:

System.Xml

組件:

System.Xml.ReaderWriter.dll

來源:

XmlNodeReader.cs

移至第一個屬性。

public:
 override bool MoveToFirstAttribute();

public override bool MoveToFirstAttribute ();

override this.MoveToFirstAttribute : unit -> bool

Public Overrides Function MoveToFirstAttribute () As Boolean

傳回

Boolean

如果屬性存在 (讀取器移至第一個屬性)，則為 true，否則為 false (不會變更讀取器的位置)。

範例

下列範例會取得根節點第一個屬性的值。

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlNodeReader^ reader = nullptr;
   try
   {
      
      //Create and load the XML document.
      XmlDocument^ doc = gcnew XmlDocument;
      doc->LoadXml( "<book genre='novel' ISBN='1-861003-78' publicationdate='1987'></book>" );
      
      //Load the XmlNodeReader 
      reader = gcnew XmlNodeReader( doc );
      
      //Read the genre attribute.
      reader->MoveToContent();
      reader->MoveToFirstAttribute();
      String^ genre = reader->Value;
      Console::WriteLine( "The genre value: {0}", genre );
   }
   finally
   {
      if ( reader != nullptr )
            reader->Close();
   }

}

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

public class Sample
{
  public static void Main()
  {
    XmlNodeReader reader = null;

    try
    {
       //Create and load the XML document.
       XmlDocument doc = new XmlDocument();
       doc.LoadXml("<book genre='novel' ISBN='1-861003-78' publicationdate='1987'> " +
                   "</book>");

       //Load the XmlNodeReader
       reader = new XmlNodeReader(doc);

       //Read the genre attribute.
       reader.MoveToContent();
       reader.MoveToFirstAttribute();
       string genre=reader.Value;
       Console.WriteLine("The genre value: " + genre);
     }
     finally
     {
        if (reader != null)
          reader.Close();
      }
  }
} // End class

Imports System.IO
Imports System.Xml

Public Class Sample
    
    Public Shared Sub Main()
        Dim reader As XmlNodeReader = Nothing
        
        Try
            'Create and load the XML document.
            Dim doc As New XmlDocument()
            doc.LoadXml("<book genre='novel' ISBN='1-861003-78' publicationdate='1987'> " & _
                        "</book>")
            
            'Load the XmlNodeReader 
            reader = New XmlNodeReader(doc)
            
            'Read the genre attribute.
            reader.MoveToContent()
            reader.MoveToFirstAttribute()
            Dim genre As String = reader.Value
            Console.WriteLine("The genre value: " & genre)
        
        Finally
            If Not (reader Is Nothing) Then
                reader.Close()
            End If
        End Try
    End Sub
End Class

備註

注意

在 .NET Framework 2.0 中，建議的做法是使用 XmlReaderSettings 類別和 Create 方法建立 XmlReader 實例。 這可讓您充分利用 .NET Framework 中引進的所有新功能如需詳細資訊，請參閱參考頁面中的 XmlReader 一節。