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

定義

命名空間:

System.Xml

組件:

netstandard.dll, System.Xml.ReaderWriter.dll

來源:

XmlWriter.cs

當在派生類別中覆寫時，會將指定的二進位位元組編碼為 ， BinHex 並寫出產生的文字。

public:
 virtual void WriteBinHex(cli::array <System::Byte> ^ buffer, int index, int count);

public virtual void WriteBinHex(byte[] buffer, int index, int count);

abstract member WriteBinHex : byte[] * int * int -> unit
override this.WriteBinHex : byte[] * int * int -> unit

Public Overridable Sub WriteBinHex (buffer As Byte(), index As Integer, count As Integer)

參數

buffer

Byte[]

用位元組陣列來編碼。

index

Int32

緩衝區中指示要寫入位元組起始的位置。

count

Int32

要寫入的位元組數。

例外狀況

ArgumentNullException

buffer 是 null。

InvalidOperationException

作者是封閉狀態或處於錯誤狀態。 -或-

在先前非同步操作結束前，會呼叫一個 XmlWriter 方法。 此時， InvalidOperationException 會拋出「非同步操作已進行中」的訊息。

ArgumentOutOfRangeException

index 或 count 小於零。

-或-

緩衝區長度減 index 值小於 count。

範例

以下範例使用該 WriteBinHex 方法來寫入 BinHex 資料。 BinHex資料嵌入在元素<image>中。

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

備註

關於此方法的非同步版本，請參見 WriteBinHexAsync。