图片转换器 

 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     }

 

posted @ 2019-10-17 20:57  苍云者  阅读(56)  评论(0)    收藏  举报