RM.Common/DotNetFile/FileHelper.cs

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using RM.Common.DotNetCode;
using RM.Common.DotNetConfig;
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Web;

namespace RM.Common.DotNetFile
{
    public class FileHelper
    {
        protected static LogHelper Logger = new LogHelper("文件帮助类");

        public static byte[] StreamToBytes(Stream stream)
        {
            byte[] result;
            try
            {
                byte[] buffer = new byte[stream.Length];
                stream.Read(buffer, 0, Convert.ToInt32(stream.Length));
                result = buffer;
            }
            catch (IOException ex)
            {
                throw ex;
            }
            finally
            {
                stream.Close();
            }
            return result;
        }

        public static Stream BytesToStream(byte[] bytes)
        {
            return new MemoryStream(bytes);
        }

        public static void StreamToFile(Stream stream, string fileName)
        {
            byte[] bytes = new byte[stream.Length];
            stream.Read(bytes, 0, bytes.Length);
            stream.Seek(0L, SeekOrigin.Begin);
            FileStream fs = new FileStream(fileName, FileMode.Create);
            BinaryWriter bw = new BinaryWriter(fs);
            bw.Write(bytes);
            bw.Close();
            fs.Close();
        }

        public static Stream FileToStream(string fileName)
        {
            FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
            byte[] bytes = new byte[fileStream.Length];
            fileStream.Read(bytes, 0, bytes.Length);
            fileStream.Close();
            return new MemoryStream(bytes);
        }