1 public class FormatChange
2 {
3 /// <summary>
4 /// 转片转字符串
5 /// </summary>
6 /// <param name="image"></param>
7 /// <returns></returns>
8 public static string ChangeImageToString(Image image)
9 {
10 string result = null;
11 try
12 {
13 MemoryStream ms = new MemoryStream();
14 image.Save(ms, image.RawFormat);
15 byte[] arr = new byte[ms.Length];
16 ms.Position = 0;
17 ms.Read(arr, 0, (int)ms.Length);
18 ms.Close();
19 result = Convert.ToBase64String(arr);
20 }
21 catch (Exception)
22 {
23 result = null;
24 }
25 return result;
26 }
27 /// <summary>
28 /// 字符转转图片
29 /// </summary>
30 /// <param name="pic"></param>
31 /// <returns></returns>
32 public static Image ChangeStringToImage(string pic)
33 {
34 try
35 {
36 byte[] imageBytes = Convert.FromBase64String(pic);
37 //读入MemoryStream对象
38 MemoryStream memoryStream = new MemoryStream(imageBytes, 0, imageBytes.Length);
39 memoryStream.Write(imageBytes, 0, imageBytes.Length);
40 //转成图片
41 Image image = Image.FromStream(memoryStream);
42
43 return image;
44 }
45 catch (Exception)
46 {
47 return null;
48 }
49 }
50
51 /// <summary>
52 /// 将图片转换为BYTE流
53 /// </summary>
54 /// <param name="img"></param>
55 /// <returns></returns>
56 public static Byte[] ImgToByte(Image img)
57 {
58 Byte[] result = null;
59 try
60 {
61 MemoryStream ms = new MemoryStream();
62 img.Save(ms,img.RawFormat);
63 byte[] arr = new byte[ms.Length];
64 ms.Position = 0;
65 ms.Read(arr, 0, (int)ms.Length);
66 result = arr;
67 ms.Close();
68 }
69 catch (Exception ex)
70 {
71 throw ex;
72 }
73
74 return result;
75
76 }
77 /// <summary>
78 /// 将BYTE流转图片
79 /// </summary>
80 /// <param name="btye"></param>
81 /// <returns></returns>
82 public static Image ByteToImg(Byte[] btye)
83 {
84 Image result = null;
85 try
86 {
87 MemoryStream memoryStream = new MemoryStream(btye, 0, btye.Length);
88 memoryStream.Write(btye, 0, btye.Length);
89 //转成图片
90 result = Image.FromStream(memoryStream);
91 }
92 catch (Exception)
93 {
94
95 throw;
96 }
97 return result;
98 }
99 }
