データベース内のBlobフィールドの読み書きの正しい方法について.

 1 class BolbHelper

 2     {

 3         /// <summary>

 4         ///  

 5         /// </summary>

 6         /// <param name="image"></param>

 7         /// <returns></returns>

 8         public static byte[] ImageToBinaryBytes(Image image)

 9         {

10             byte[] result;

11             using (var ms = new MemoryStream())

12             {

13                 image.Save(ms, ImageFormat.Bmp);

14                 using(var br = new BinaryReader(ms))

15                 {

16                     ms.Seek(0, SeekOrigin.Begin);

17                     result = br.ReadBytes((int)ms.Length);

18                     br.Close();

19                 }

20                 ms.Close();

21             }

22             return result;

23         }

24 

25         /// <summary>

26         ///  

27         /// </summary>

28         /// <param name="data"></param>

29         /// <returns></returns>

30         public static Image ImageFromBinaryBytes(byte[] data)

31         {

32             Image result;

33             using (var ms = new MemoryStream())

34             {

35                 using(var bw = new BinaryWriter(ms))

36                 {

37                     bw.Write(data);

38                     result = Image.FromStream(ms);

39                     bw.Close();

40                 }

41                 ms.Close();

42             }

43             return result;

44         }

45     }