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();

}
}
}