XmlWriter.WriteBinHex(Byte[], Int32, Int32) Metoda

Definice

Při přepsání v odvozené třídě zakóduje zadané binární bajty jako BinHex a zapisuje výsledný text.When overridden in a derived class, encodes the specified binary bytes as BinHex and writes out the resulting text.

public:
 virtual void WriteBinHex(cli::array <System::Byte> ^ buffer, int index, int count);
public:
 abstract void WriteBinHex(cli::array <System::Byte> ^ buffer, int index, int count);
public virtual void WriteBinHex (byte[] buffer, int index, int count);
public abstract void WriteBinHex (byte[] buffer, int index, int count);
abstract member WriteBinHex : byte[] * int * int -> unit
override this.WriteBinHex : byte[] * int * int -> unit
abstract member WriteBinHex : byte[] * int * int -> unit
Public Overridable Sub WriteBinHex (buffer As Byte(), index As Integer, count As Integer)
Public MustOverride Sub WriteBinHex (buffer As Byte(), index As Integer, count As Integer)

Parametry

buffer
Byte[]

Bajtové pole ke kódování.Byte array to encode.

index
Int32

Pozice ve vyrovnávací paměti, která označuje začátek bajtů k zápisu.The position in the buffer indicating the start of the bytes to write.

count
Int32

Počet bajtů, které mají být zapsány.The number of bytes to write.

Výjimky

buffer je null.buffer is null.

Zapisovač je uzavřený nebo v chybovém stavu.The writer is closed or in error state. -nebo--or-

XmlWriterMetoda byla volána před dokončením předchozí asynchronní operace.An XmlWriter method was called before a previous asynchronous operation finished. V tomto případě InvalidOperationException je vyvolána se zprávou "asynchronní operace již probíhá".In this case, InvalidOperationException is thrown with the message "An asynchronous operation is already in progress."

index nebo count je menší než nula.index or count is less than zero.

-nebo--or- Velikost vyrovnávací paměti minus index je menší než count .The buffer length minus index is less than count.

Příklady

Následující příklad používá WriteBinHex metodu pro zápis BinHex dat.The following example uses the WriteBinHex method to write BinHex data. BinHexData jsou vložena v rámci <image> elementu.The BinHex data is embedded within an <image> element.


public static void BinHexEncodeImageFile() {

  int bufferSize = 1000;
  byte[] buffer = new byte[bufferSize];
  int readBytes = 0;
    
  using (XmlWriter writer = XmlWriter.Create("output.xml")) {
       FileStream inputFile = new FileStream(@"C:\artFiles\sunset.jpg", FileMode.OpenOrCreate,
                                                                    FileAccess.Read, FileShare.Read);
       writer.WriteStartDocument();
       writer.WriteStartElement("image");
       BinaryReader br = new BinaryReader(inputFile);
       Console.WriteLine("\r\nWriting BinHex data...");

       do {
          readBytes = br.Read(buffer, 0, bufferSize);
          writer.WriteBinHex(buffer, 0, readBytes);
       } while (bufferSize <= readBytes);
       br.Close();

    writer.WriteEndElement();// </image>
    writer.WriteEndDocument();
  }
}
Public Shared Sub BinHexEncodeImageFile() 
    
    Dim bufferSize As Integer = 1000
    Dim buffer(bufferSize) As Byte
    Dim readBytes As Integer = 0
    
    Using writer As XmlWriter = XmlWriter.Create("output.xml")

            Dim inputFile As New FileStream("C:\artFiles\sunset.jpg", FileMode.OpenOrCreate, FileAccess.Read, FileShare.Read)
            writer.WriteStartDocument()
            writer.WriteStartElement("image")
            Dim br As New BinaryReader(inputFile)
            Console.WriteLine(vbCr + vbLf + "Writing BinHex data...")
            
            Do
                readBytes = br.Read(buffer, 0, bufferSize)
                writer.WriteBinHex(buffer, 0, readBytes)
            Loop While bufferSize <= readBytes
            br.Close()

        writer.WriteEndElement() ' </image>
        writer.WriteEndDocument()

    End Using
 
End Sub

Poznámky

Asynchronní verze této metody naleznete v tématu WriteBinHexAsync .For the asynchronous version of this method, see WriteBinHexAsync.

Platí pro