1 //图片 转为 base64编码的文本
2 private void button1_Click(object sender, EventArgs e)
3 {
4 OpenFileDialog dlg = new OpenFileDialog();
5 dlg.Multiselect = true;
6 dlg.Title = "选择要转换的图片";
7 dlg.Filter = "Image files (*.jpg;*.bmp;*.gif;*.png)|*.jpg*.jpeg;*.gif;*.bmp|AllFiles (*.*)|*.*";
8 if (DialogResult.OK == dlg.ShowDialog())
9 {
10 for (int i = 0; i < dlg.FileNames.Length; i++)
11 {
12 ImgToBase64String(dlg.FileNames[i].ToString());
13 }
14 }
15 }
16 //图片 转为 base64编码的文本
17 private void ImgToBase64String(string Imagefilename)
18 {
19 try
20 {
21 Bitmap bmp = new Bitmap(Imagefilename);
22 this.pictureBox1.Image = bmp;
23 FileStream fs = new FileStream(Imagefilename + ".txt", FileMode.Create);
24 StreamWriter sw = new StreamWriter(fs);
25
26 MemoryStream ms = new MemoryStream();
27 bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
28 byte[] arr = new byte[ms.Length];
29 ms.Position = 0;
30 ms.Read(arr, 0, (int)ms.Length);
31 ms.Close();
32 String strbaser64 = Convert.ToBase64String(arr);
33 sw.Write(strbaser64);
34
35 sw.Close();
36 fs.Close();
37 // MessageBox.Show("转换成功!");
38 }
39 catch (Exception ex)
40 {
41 MessageBox.Show("ImgToBase64String 转换失败
Exception:" + ex.Message);
42 }
43 }
44
45 //base64编码的文本 转为 图片
46 private void button2_Click(object sender, EventArgs e)
47 {
48 OpenFileDialog dlg = new OpenFileDialog();
49 dlg.Multiselect = true;
50 dlg.Title = "选择要转换的base64编码的文本";
51 dlg.Filter = "txt files|*.txt";
52 if (DialogResult.OK == dlg.ShowDialog())
53 {
54 for (int i = 0; i < dlg.FileNames.Length; i++)
55 {
56 Base64StringToImage(dlg.FileNames[i].ToString());
57 }
58
59 }
60 }
61 //base64编码的文本 转为 图片
62 private void Base64StringToImage(string txtFileName)
63 {
64 try
65 {
66 FileStream ifs = new FileStream(txtFileName, FileMode.Open, FileAccess.Read);
67 StreamReader sr = new StreamReader(ifs);
68
69 String inputStr = sr.ReadToEnd();
70 byte[] arr = Convert.FromBase64String(inputStr);
71 MemoryStream ms = new MemoryStream(arr);
72 Bitmap bmp = new Bitmap(ms);
73
74 //bmp.Save(txtFileName + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
75 //bmp.Save(txtFileName + ".bmp", ImageFormat.Bmp);
76 //bmp.Save(txtFileName + ".gif", ImageFormat.Gif);
77 //bmp.Save(txtFileName + ".png", ImageFormat.Png);
78 ms.Close();
79 sr.Close();
80 ifs.Close();
81 this.pictureBox2.Image = bmp;
82 if (File.Exists(txtFileName))
83 {
84 File.Delete(txtFileName);
85 }
86 //MessageBox.Show("转换成功！");
87 }
88 catch (Exception ex)
89 {
90 MessageBox.Show("Base64StringToImage 转换失败
Exception：" + ex.Message);
91 }
92 }
