如何将随机图像加载并显示到c＃中的图片框中？ [英] How to load and show random images into a picture box in c# ?

问题描述

我正在制作一个应用程序，当我点击一个按钮时，一些位图图片会从特定位置随机加载并显示在pictureBox中！怎么做？



我的代码已经是这样的：

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 :

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);
            }

        }
    }
}

推荐答案

如果你使用图像路线，您可以使用列表 images = new List （）创建图像列表;并使用images.Add（image）添加每个图像。对于每个图像。

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)];

试试这个：

Try this:

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)]);
    }

1. 创建图像名称列表（您可以使用 DirectoryInfo.EnumerateFiles方法 [ ^ ]以实现它。）
2. 在 0 和（List.Count-1）之间选择一个随机数 r 。
3. 加载并显示与列表项 r 相对应的图像。
4. 等待按钮单击
5. 转到第2点。

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

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