文件与二进制流间的转换

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Threading.Tasks;

namespace InfoPublish.Model.Tools
{
    /// 

    /// 工具类：二进制与byte数组互相转换
    /// 
    public class ByteConvertHelper
    {
        /// 

        /// 将对象转换为byte数组
        /// 
        /// 被转换对象
        /// 转换后byte数组
        public static byte[] Object2Bytes(object obj)
        {
            byte[] buff;
            using (MemoryStream ms = new MemoryStream())
            {
                IFormatter iFormatter = new BinaryFormatter();
                iFormatter.Serialize(ms, obj);
                buff = ms.GetBuffer();
            }
            return buff;
        }

        /// 

        /// 将byte数组转换成对象
        /// 
        /// 被转换byte数组
        /// 转换完成后的对象
        public static object Bytes2Object(byte[] buff)
        {
            object obj;
            using (MemoryStream ms = new MemoryStream(buff))
            {
                IFormatter iFormatter = new BinaryFormatter();
                obj = iFormatter.Deserialize(ms);
            }
            return obj;
        }

        /// 

        /// 从byte数组创建Image
        /// 
        public static Image Bytes2Image(byte[] bytes)
        {
            System.IO.MemoryStream stream = new System.IO.MemoryStream();
            stream.Write(bytes, 0, bytes.Length);
            Image image = Image.FromStream(stream);

            return image;
        }

        /// 

        /// 将Image转化为byte数组,使用缓存文件中转
        /// 
        public static byte[] Image2Bytes_tmpFile(Image image, ImageFormat imageFormat = null)
        {
            if (imageFormat == null) imageFormat = ImageFormat.Jpeg;
            String tmpFilePath = AppDomain.CurrentDomain.BaseDirectory + DateTime.Now.Ticks + ".stream";
            image.Save(tmpFilePath, imageFormat);   // 保存图像到文件

            byte[] bytes = FileBinaryConvertHelper.File2Bytes(tmpFilePath); // 从文件中获取字节数组
            if (File.Exists(tmpFilePath)) File.Delete(tmpFilePath); //删除文件

            return bytes;
        }


        //private static System.Windows.Controls.Image Bitmap2Image(System.Drawing.Bitmap Bi)
        //{
        //    MemoryStream ms = new MemoryStream();
        //    Bi.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
        //    BitmapImage bImage = new BitmapImage();
        //    bImage.BeginInit();
        //    bImage.StreamSource = new MemoryStream(ms.ToArray());
        //    bImage.EndInit();
        //    ms.Dispose();
        //    Bi.Dispose();
        //    System.Windows.Controls.Image i = new System.Windows.Controls.Image();
        //    i.Source = bImage;
        //    return i;
        //}


        //byte[] 转换 Bitmap
        public static Bitmap BytesToBitmap(byte[] Bytes)
        {
            MemoryStream stream = null;
            try
            {
                stream = new MemoryStream(Bytes);
                return new Bitmap((Image)new Bitmap(stream));
            }
            catch (ArgumentNullException ex)
            {
                throw ex;
            }
            catch (ArgumentException ex)
            {
                throw ex;
            }
            finally
            {
                stream.Close();
            }
        }

        //Bitmap转byte[]  
        public static byte[] BitmapToBytes(Bitmap Bitmap)
        {
            MemoryStream ms = null;
            try
            {
                ms = new MemoryStream();
                Bitmap.Save(ms, Bitmap.RawFormat);
                byte[] byteImage = new Byte[ms.Length];
                byteImage = ms.ToArray();
                return byteImage;
            }
            catch (ArgumentNullException ex)
            {
                throw ex;
            }
            finally
            {
                ms.Close();
            }
        }
    }

    /// 

    /// 工具类：文件与二进制流间的转换
    /// 
    public class FileBinaryConvertHelper
    {
        /// 

        /// 将文件转换为byte数组
        /// 
        /// 文件地址
        /// 转换后的byte数组
        public static byte[] File2Bytes(string path)
        {
            if (!File.Exists(path))
            {
                return new byte[0];
            }

            FileInfo fi = new FileInfo(path);
            byte[] buff = new byte[fi.Length];

            FileStream fs = fi.OpenRead();
            fs.Read(buff, 0, Convert.ToInt32(fs.Length));
            fs.Close();

            return buff;
        }

        /// 

        /// 将byte数组转换为文件并保存到指定地址
        /// 
        /// byte数组
        /// 保存地址
        public static void Bytes2File(byte[] buff, string savepath)
        {
            if (File.Exists(savepath))
            {
                File.Delete(savepath);
            }

            FileStream fs = new FileStream(savepath, FileMode.CreateNew);
            BinaryWriter bw = new BinaryWriter(fs);
            bw.Write(buff, 0, buff.Length);
            bw.Close();
            fs.Close();
        }
    }
}