2. Текст програми:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace Task2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private string[] pFileNames;
private int pCurrentImage;
private int n;
private void ShowCurrentImage()
{
if (pCurrentImage >= 0)
{
pictureBox1.Image = Bitmap.FromFile(pFileNames[pCurrentImage]);
}
}
private void button1_Click(object sender, EventArgs e)
{
if (pFileNames.Length > 0)
{
pCurrentImage = pCurrentImage == 0 ? pFileNames.Length - 1 : --pCurrentImage;
textBox1.Text = pFileNames[pCurrentImage];
ShowCurrentImage();
}
}
private void button2_Click(object sender, EventArgs e)
{
if (pFileNames.Length > 0)
{
pCurrentImage = pCurrentImage == pFileNames.Length - 1 ? 0 : ++pCurrentImage;
int n = pFileNames.Length;
textBox1.Text = pFileNames[pCurrentImage];
ShowCurrentImage();
}
}
private void button3_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.Multiselect = true;
openFileDialog1.Filter = "JPEG (*.jpg,*.jpeg,*.jpe,*.jfif)|*.jpg;*.jpeg;*.jpe;*.jfif|PNG (*.png)|*.png|ICO (*.ico)|*.ico|TIFF (*.tif,*.tiff)|*.tif;*.tiff|GIF (*.gif)|*.gif";
openFileDialog1.FilterIndex = 1;
openFileDialog1.RestoreDirectory = true;
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
pFileNames = openFileDialog1.FileNames;
button2.Enabled = true;
button1.Enabled = true;
pCurrentImage = 0;
textBox1.Text = pFileNames[0];
listBox1.Items.Clear();
n = pFileNames.Length;
for (int i = 0; i < n; i++)
{
listBox1.Items.Add(pFileNames[i]);
}
if (listBox1.Items.Count == 0) { }
else
{
listBox1.SelectedIndex = 0;
}
ShowCurrentImage();
}
}
private void button4_Click(object sender, EventArgs e)
{
listBox1.Items.Clear();
textBox1.Text = "";
button2.Enabled = false;
button1.Enabled = false;
pFileNames = null;
pictureBox1.Image = null;
}
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
pCurrentImage = listBox1.SelectedIndex;
textBox1.Text = pFileNames[pCurrentImage];
ShowCurrentImage();
}
}
}
На рис. 1.2 зображені результати роботи програми:
Рисунок 1.2 – Робота програми