1 using System;
2 using System.Drawing;
3 using System.Drawing.Imaging;
4 using System.IO;
5
6 namespace XiaoBai.Uril.ImgHelper
7 {
8 ///
9 /// Img与Base64转化的帮助类
10 ///
11 public class Base64ImgHelper
12 {
13 ///
14 /// Img转Base64的方法
15 ///
16 /// bmp类型的图片数据
17 /// Img原来的格式
18 ///
19 public string ImgToBase64Str(Bitmap bitmap, ImageFormat imgFromat)
20 {
21 try
22 {
23 MemoryStream ms = new MemoryStream();
24 bitmap.Save(ms, imgFromat);
25 byte[] arr = new byte[ms.Length];
26 ms.Position = 0;
27 ms.Read(arr, 0, (int)ms.Length);
28 ms.Close();
29
30 return Convert.ToBase64String(arr);
31 }
32 catch
33 {
34 return null;
35 }
36 }
37
38 ///
39 /// Base64转Img的方法
40 /// img.Save("ImgName.png", ImageFormat.Png);
41 ///
42 /// 图片源的Base64字节流
43 ///
44 public System.Drawing.Image Base64StrToImg(string base64Str)
45 {
46 try
47 {
48 byte[] arr = Convert.FromBase64String(base64Str);
49 MemoryStream ms = new MemoryStream(arr);
50 return System.Drawing.Image.FromStream(ms);
51
52 }
53 catch
54 {
55 return null;
56 }
57 }
58 }
59 }