C#二进制字节数组操作函数 截取字节数组SubByte的示例代码

    /// <summary>

    /// 截取字节数组

    /// </summary>

    /// <param name="srcBytes">要截取的字节数组</param>

    /// <param name="startIndex">开始截取位置的索引</param>

    /// <param name="length">要截取的字节长度</param>

    /// <returns>截取后的字节数组</returns>

    public byte[] SubByte(byte[] srcBytes, int startIndex, int length)

    {

        System.IO.MemoryStream bufferStream = new System.IO.MemoryStream();

        byte[] returnByte = new byte[] { };

        if (srcBytes == null) { return returnByte; }

        if (startIndex < 0) { startIndex = 0; }

        if (startIndex < srcBytes.Length)

        {

            if (length < 1 || length > srcBytes.Length - startIndex) { length = srcBytes.Length - startIndex; }

            bufferStream.Write(srcBytes, startIndex, length);

            returnByte = bufferStream.ToArray();

            bufferStream.SetLength(0);

            bufferStream.Position = 0;

        }

        bufferStream.Close();

        bufferStream.Dispose();

        return returnByte;

    }

}