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

定义

命名空间:

System.Xml

程序集:

System.Xml.ReaderWriter.dll

程序集:

System.Xml.dll

程序集:

netstandard.dll

当在派生类中被重写时，将指定的二进制字节编码为 BinHex 并写出结果文本。

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)

参数

buffer

Byte[]

要进行编码的字节数组。

index

Int32

缓冲区中指示要写入字节的起始位置的位置。

count

Int32

要写入的字节数。

例外

ArgumentNullException

buffer 为 null。

InvalidOperationException

编写器已关闭或处于错误状态。

• 或 -

在上一次异步操作完成之前调用了 XmlWriter 方法。 在此情况下，会引发 InvalidOperationException 并显示消息“异步操作已在进行中。”

ArgumentOutOfRangeException

index 或 count 小于零。

• 或 - 缓冲区长度减去 index 小于 count。

示例

以下示例使用 WriteBinHex 该方法写入 BinHex 数据。 数据 BinHex 嵌入在 <image> 元素中。

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

注解

有关此方法的异步版本，请参阅 WriteBinHexAsync。