StreamReader.CurrentEncoding Eigenschaft

Referenz

Definition

Namespace:: System.IO

Assembly:: System.IO.dll

Assembly:: System.Runtime.dll

Assembly:: System.Runtime.Extensions.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Quelle:: StreamReader.cs

Quelle:: StreamReader.cs

Quelle:: StreamReader.cs

Wichtig

Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.

Ruft die aktuelle Zeichencodierung ab, die das aktuelle StreamReader-Objekt verwendet.

public:
 virtual property System::Text::Encoding ^ CurrentEncoding { System::Text::Encoding ^ get(); };

public virtual System.Text.Encoding CurrentEncoding { get; }

member this.CurrentEncoding : System.Text.Encoding

Public Overridable ReadOnly Property CurrentEncoding As Encoding

Eigenschaftswert

Encoding

Die durch das aktuelle Leseprogramm verwendete aktuelle Zeichencodierung. Der Wert kann sich nach dem ersten Aufruf einer Read-Methode von StreamReader ändern, da die automatische Erkennung der Codierung erst nach dem ersten Aufruf einer Read-Methode erfolgt.

Beispiele

Im folgenden Codebeispiel wird die Codierung des angegebenen StreamReader Objekts abgerufen.

using namespace System;
using namespace System::IO;
using namespace System::Text;

int main()
{
   String^ path = "c:\\temp\\MyTest.txt";
   try
   {
      if ( File::Exists( path ) )
      {
         File::Delete( path );
      }

      //Use an encoding other than the default (UTF8).
      StreamWriter^ sw = gcnew StreamWriter( path,false,gcnew UnicodeEncoding );
      try
      {
         sw->WriteLine( "This" );
         sw->WriteLine( "is some text" );
         sw->WriteLine( "to test" );
         sw->WriteLine( "Reading" );
      }
      finally
      {
         delete sw;
      }

      StreamReader^ sr = gcnew StreamReader( path,true );
      try
      {
         while ( sr->Peek() >= 0 )
         {
            Console::Write( (Char)sr->Read() );
         }

         //Test for the encoding after reading, or at least
         //after the first read.
         Console::WriteLine( "The encoding used was {0}.", sr->CurrentEncoding );
         Console::WriteLine();
      }
      finally
      {
         delete sr;
      }
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "The process failed: {0}", e );
   }
}

using System;
using System.IO;
using System.Text;

class Test
{
    
    public static void Main()
    {
        string path = @"c:\temp\MyTest.txt";

        try
        {
            if (File.Exists(path))
            {
                File.Delete(path);
            }

            //Use an encoding other than the default (UTF8).
            using (StreamWriter sw = new StreamWriter(path, false, new UnicodeEncoding()))
            {
                sw.WriteLine("This");
                sw.WriteLine("is some text");
                sw.WriteLine("to test");
                sw.WriteLine("Reading");
            }

            using (StreamReader sr = new StreamReader(path, true))
            {
                while (sr.Peek() >= 0)
                {
                    Console.Write((char)sr.Read());
                }

                //Test for the encoding after reading, or at least
                //after the first read.
                Console.WriteLine("The encoding used was {0}.", sr.CurrentEncoding);
                Console.WriteLine();
            }
        }
        catch (Exception e)
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
    }
}

Imports System.IO
Imports System.Text

Public Class Test

    Public Shared Sub Main()
        Dim path As String = "c:\temp\MyTest.txt"
        Try
            If File.Exists(path) Then
                File.Delete(path)
            End If

            'Use an encoding other than the default (UTF8).
            Dim sw As StreamWriter = New StreamWriter(path, False, New UnicodeEncoding())
            sw.WriteLine("This")
            sw.WriteLine("is some text")
            sw.WriteLine("to test")
            sw.WriteLine("Reading")
            sw.Close()

            Dim sr As StreamReader = New StreamReader(path, True)

            Do While sr.Peek() >= 0
                Console.Write(Convert.ToChar(sr.Read()))
            Loop

            'Test for the encoding after reading, or at least
            'after the first read.
            Console.WriteLine("The encoding used was {0}.", sr.CurrentEncoding)
            Console.WriteLine()

            sr.Close()
        Catch e As Exception
            Console.WriteLine("The process failed: {0}", e.ToString())
        End Try
    End Sub
End Class

Hinweise

Eine Liste allgemeiner E/A-Aufgaben finden Sie unter Allgemeine E/A-Aufgaben.

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