How to load and show random images into a picture box in c# ?

Question

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I am making an application, that when i click a button, some bitmap pictures load randomly from a specific location and be shown in a pictureBox ! How to do it ?

my code is already like this :

C#

using System;
using System.Threading;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MLP_OCR
{
    public partial class Form1 : Form
    {
        int index = -1;
        List<Image> images;

        public Form1()
        {
            InitializeComponent();
            images = new List<Image>();
            DirectoryInfo di = new DirectoryInfo(@"F:\bmp"); // give path
            FileInfo[] finfos = di.GetFiles("*.bmp", SearchOption.AllDirectories);
            foreach (FileInfo fi in finfos)
                images.Add(Image.FromFile(fi.FullName));
        }

        private async void trainButton_Click(object sender, EventArgs e)
        {
            for (index=-1; index < 1699; index++)
            {
                //index++;
                if (index < 0 || index >= images.Count)
                    index = 0;
                samplePictureBox.Image = images[index];
                await Task.Delay(2);
            }

        }
    }
}

Posted 6-Nov-13 2:06am

Dark Sauron

Updated 26-Feb-19 6:22am

v4

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3 solutions

Solution 1

Try this:

C#

private Random rand = new Random();
...
public void GetRandomImage()
    {
    string[] files = Directory.GetFiles(@"D:\Temp\", "*.jpg", SearchOption.AllDirectories);
    myPictureBox.Image = Image.FromFile(files[rand.Next(files.Length)]);
    }

Posted 6-Nov-13 2:21am

OriginalGriff

Solution 2

Create a list of image names (you may use the DirectoryInfo.EnumerateFiles method[^] in order to accomplish it).
Pick a random number r, between 0 and (List.Count-1).
Load and show the image corrensponding to the item r of the list.
Wait for button click
Go to point 2.

Posted 6-Nov-13 2:24am

CPallini

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sankarsan parida · Accepted Answer · 2013-11-06T06:29:00

Solution 3

If you're using the Image route, you can create a list of images with List images = new List(); and add each image to it with images.Add(image); for each image.

For Images:

Random random = new Random();
samplePictureBox.Image = images[random.Next(0, images.Count - 1)];

Posted 6-Nov-13 6:29am

sankarsan parida

Comments

Dark Sauron 6-Nov-13 16:18pm

Thank you, that worked like a charm :-X