从sql中image类型字段中导出图片

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

using System.Data.SqlClient;

using System.Data;

using System.Drawing.Imaging;

using System.Drawing;



namespace 获取名字

{

    class Program

    {

        static void Main(string[] args)

        {

            string path = @"C:\Users\Chinaese\Desktop\_FabricImg";

            string x = Path.GetFileName(Path.GetDirectoryName(path));



            DirectoryInfo root = new DirectoryInfo(path);

            // DirectoryInfo[] childDirs = root.GetDirectories();

            FileInfo[] files = root.GetFiles();

            List<string> filename = new List<string>();

            foreach (FileInfo item in files)

            {

                filename.Add(Path.GetFileNameWithoutExtension(item.FullName));

            }



    

           string connectionString=@"Data Source = 192.168.0.180; Initial Catalog = pms; User Id = sa; Password = hualong2012;";

            using (SqlConnection connection = 

             new SqlConnection(connectionString)) 

            { 

             SqlCommand command =

             new SqlCommand("SELECT FlowerCode,PicImg FROM FlowerPics where flowerid  IN ( SELECT     MAX(flowerid) AS Expr1 FROM         FlowerPics GROUP BY FlowerCode )", connection); 

             connection.Open(); 

 

             SqlDataReader reader = command.ExecuteReader(); 

 

             // 判断数据是否读到尾. 

             while (reader.Read()) 

             {

                 //声明数组，用于保存数据库的二进制数据

                 byte[] mybyte = null;

                 //读取数据保存到数组中

                 try

                 {

                     if (filename.Contains(reader[0]))

                     {

                         continue;

                     }

                     mybyte = (byte[])reader["PicImg"];

                     Image image;

                     //读取数组数据成为文件流

                     MemoryStream mymemorystream = new MemoryStream(mybyte);

                     //转换成为图片格式。

                     image = Image.FromStream(mymemorystream, true);

                    

           

                     //image.Save(mymemorystream, ImageFormat.Jpeg);

                     image.Save(@"C:\Users\Chinaese\Desktop\SAMP\" + reader[0].ToString() + ".bmp", System.Drawing.Imaging.ImageFormat.Bmp);

                     mymemorystream.Close();  //关闭流

                     filename.Add(reader[0].ToString());



                 }

                 catch (Exception)

                 {

                    

                     //break;

                 }

                 finally

                 {



                 }



                 //Console.WriteLine(String.Format("{0}, {1}",      reader[0], reader[1])); 

             } 

 

             // 一定要关闭 reader 对象. 

             reader.Close(); 

            }







            Console.ReadKey();





        }

    }

}