XmlTextReader.MoveToFirstAttribute Method

Reference

Definition

Namespace:: System.Xml

Assemblies:: netstandard.dll, System.Xml.ReaderWriter.dll

Assembly:: System.Xml.ReaderWriter.dll

Assembly:: System.Xml.dll

Assembly:: netstandard.dll

Source:: XmlTextReader.cs

Source:: XmlTextReader.cs

Source:: XmlTextReader.cs

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.

Moves to the first attribute.

public:
 override bool MoveToFirstAttribute();

public override bool MoveToFirstAttribute();

override this.MoveToFirstAttribute : unit -> bool

Public Overrides Function MoveToFirstAttribute () As Boolean

Returns

Boolean

true if an attribute exists (the reader moves to the first attribute); otherwise, false (the position of the reader does not change).

Examples

The following example gets the value of the first attribute of the root node.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlTextReader^ reader = nullptr;
   try
   {
      
      //Load the reader with the XML file.
      reader = gcnew XmlTextReader( "attrs.xml" );
      
      //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()
  {
    XmlTextReader reader = null;

    try
    {
       //Load the reader with the XML file.
       reader = new XmlTextReader("attrs.xml");

       //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 XmlTextReader = Nothing
      
      Try
         'Load the reader with the XML file.
         reader = New XmlTextReader("attrs.xml")
         
         '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

The example uses the file, attrs.xml, as input.

XML


<book genre='novel' ISBN='1-861003-78' pubdate='1987'>
</book>

Remarks

Бележка

Starting with the .NET Framework 2.0, we recommend that you create XmlReader instances by using the XmlReader.Create method to take advantage of new functionality.

Applies to

Продукт	Версии
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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