How can I download multiple images and show them in a pictureBox ?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using HtmlAgilityPack;
namespace SatImages
{
public partial class Form1 : Form
{
private int counter = 0;
public Form1()
{
InitializeComponent();
backgroundWorker1.RunWorkerAsync();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void Download()
{
var wc = new WebClient();
wc.BaseAddress = "https://en.sat24.com/en/tu/infraPolair";
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
var temp = wc.DownloadData("/en");
doc.Load(new MemoryStream(temp));
var secTokenScript = doc.DocumentNode.Descendants()
.Where(e =>
String.Compare(e.Name, "script", true) == 0 &&
String.Compare(e.ParentNode.Name, "div", true) == 0 &&
e.InnerText.Length > 0 &&
e.InnerText.Trim().StartsWith("var region")
).FirstOrDefault().InnerText;
var securityToken = secTokenScript;
securityToken = securityToken.Substring(0, securityToken.IndexOf("arrayImageTimes.push"));
securityToken = secTokenScript.Substring(securityToken.Length).Replace("arrayImageTimes.push('", "").Replace("')", "");
var dates = securityToken.Trim().Split(new string[] { ";" }, StringSplitOptions.RemoveEmptyEntries);
var scriptDates = dates.Select(x => new ScriptDate { DateString = x });
foreach (var date in scriptDates)
{
string img = "https://en.sat24.com/image?type=infraPolair®ion=tu×tamp=" + date.DateString;
Image image = DownloadImageFromUrl(img);
image.Save(@"d:\satimages\" + counter + ".jpg");
counter++;
}
}
public class ScriptDate
{
public string DateString { get; set; }
public int Year
{
get
{
return Convert.ToInt32(this.DateString.Substring(0, 4));
}
}
public int Month
{
get
{
return Convert.ToInt32(this.DateString.Substring(4, 2));
}
}
public int Day
{
get
{
return Convert.ToInt32(this.DateString.Substring(6, 2));
}
}
public int Hours
{
get
{
return Convert.ToInt32(this.DateString.Substring(8, 2));
}
}
public int Minutes
{
get
{
return Convert.ToInt32(this.DateString.Substring(10, 2));
}
}
}
public System.Drawing.Image DownloadImageFromUrl(string imageUrl)
{
System.Drawing.Image image = null;
try
{
System.Net.HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(imageUrl);
webRequest.AllowWriteStreamBuffering = true;
webRequest.Timeout = 30000;
System.Net.WebResponse webResponse = webRequest.GetResponse();
System.IO.Stream stream = webResponse.GetResponseStream();
image = System.Drawing.Image.FromStream(stream);
webResponse.Close();
}
catch (Exception ex)
{
return null;
}
return image;
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
Download();
}
}
}

The main section for downloading images is here; from line no 56

foreach (var date in scriptDates)
{
string img = "https://en.sat24.com/image?type=infraPolair®ion=tu×tamp=" + date.DateString;
Image image = DownloadImageFromUrl(img);
image.Save(@"d:\satimages\" + counter + ".jpg");
counter++;
}

You can do your stuffs like showing progress downloads etc, do like below

// setting progressbar
progressBar1.Value=0;
progressBar1.Maximum = scriptDates.Count;
foreach (var date in scriptDates)
{
string img = "https://en.sat24.com/image?type=infraPolair®ion=tu×tamp=" + date.DateString;
ShowProgress(true);
Image image = DownloadImageFromUrl(img);
image.Save(@"d:\satimages\" + counter + ".jpg");
ShowProgress(false);
counter++;
}
public void ShowProgress(bool isLoading)
{
// your animated loading image in picturebox and set the delay, if required
picLoadingAnimation.IsVisible = isLoading;
//setting delay after saving the image
if(!isLoading)
{
Thread.Sleep(500); // in milliseconds
//update the progressbar value
progressBar1.Value++;
}
}

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Amit Gupta5y ago
The main section for downloading images is here; from line no 56
foreach (var date in scriptDates)

{

    string img = "https://en.sat24.com/image?type=infraPolair®ion=tu×tamp=" + date.DateString;



    Image image = DownloadImageFromUrl(img);

    image.Save(@"d:\satimages\" + counter + ".jpg");

    counter++;

}
You can do your stuffs like showing progress downloads etc, do like below
// setting progressbar
progressBar1.Value=0;
progressBar1.Maximum = scriptDates.Count;

foreach (var date in scriptDates)
{
    string img = "https://en.sat24.com/image?type=infraPolair®ion=tu×tamp=" + date.DateString;
    ShowProgress(true);
    Image image = DownloadImageFromUrl(img);
    image.Save(@"d:\satimages\" + counter + ".jpg");
    ShowProgress(false);
    counter++;
}

public void ShowProgress(bool isLoading)
{
       // your animated loading image in picturebox and set the delay, if required
       picLoadingAnimation.IsVisible = isLoading;

       //setting delay after saving the image
       if(!isLoading)
       {
         Thread.Sleep(500); // in milliseconds

          //update the progressbar value
          progressBar1.Value++;
        }
}
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