获取网络图片验证码转换字节流保存本地并显示

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.IO;
 7 using System.Linq;
 8 using System.Net;
 9 using System.Text;
10 using System.Threading.Tasks;
11 using System.Windows.Forms;
12 
13 namespace _0922
14 {
15     public partial class Form1 : Form
16     {
17         public Form1()
18         {
19             InitializeComponent();
20         }
21 
22         private void Form1_Load(object sender, EventArgs e)
23         {
24             //将服务器上图片保存本地
25             string url = string.Format("https://kyfw.12306.cn/otn/passcodeNew/getPassCodeNew?module=regist&rand=sjrand&0.5173300584942714");
26             //创建一个request 同时可以配置requst其余属性
27 
28             System.Net.WebRequest imgRequst = System.Net.WebRequest.Create(url);
29             //在这里我是以流的方式保存图片
30 
31             System.Drawing.Image downImage = System.Drawing.Image.FromStream(imgRequst.GetResponse().GetResponseStream());
32 
33             string dertory = "C:\\test\\";
34 
35             string fileName = string.Format("{0}.jpg", DateTime.Now.ToString("HHmmssffff"));
36 
37             if (!System.IO.Directory.Exists(dertory))
38             {
39 
40                 System.IO.Directory.CreateDirectory(dertory);
41             }
42 
43             downImage.Save(dertory + fileName,System.Drawing.Imaging.ImageFormat.Jpeg);
44 
45             downImage.Dispose();
46 
47             this.pictureBox1.Image = Image.FromFile(dertory+fileName);
48            
49 
50 
51         }
52        
53 
54 
55 
56     }
57 }