This is a simple C# application that can open and view images, and show the images one by one in a slide show. The purpose of this article is for a beginner to know how to create an image slide show using timers, in C#.
Using the code
To make this application, I used
Buttons (for Next, Previous, Open, and Slideshow), a
PictureBox, and a Panel (to contain the
SizeMode” is set to “
First, declare these four variables:
private string  folderFile = null;
private int selected = 0;
private int begin = 0;
private int end = 0;
The first variable is a string array that will be used to keep the path file of the folder. The remaining variables are used to ‘mark’ the beginning of the array, the end of the array, and the selected index of the array, respectively.
private void button2_Click(object sender, System.EventArgs e)
if(folderBrowserDialog1.ShowDialog() == DialogResult.OK)
string  part1=null, part2=null, part3=null;
part1 = Directory.GetFiles(folderBrowserDialog1.SelectedPath,"*.jpg");
part2 = Directory.GetFiles(folderBrowserDialog1.SelectedPath,"*.jpeg");
part3 = Directory.GetFiles(folderBrowserDialog1.SelectedPath,"*.bmp");
folderFile = new string[part1.Length + part2.Length + part3.Length];
Array.Copy(part3,0,folderFile,part1.Length + part2.Length,part3.Length);
selected = 0;
begin = 0;
end = folderFile.Length;
button1.Enabled = true;
button3.Enabled = true;
button4.Enab led = true;
FolderBrowserDialog result is ‘OK’, then get all the JPG, JPEG, and BMP files on the folder and copy them to the
fileFolder array. Then, show the images by calling
private void showImage(string path)
Image imgtemp = Image.FromFile(path);
pictureBox1.Width = imgtemp.Width / 2;
pictureBox1.Height = imgtemp.Height / 2;
pictureBox1.Image = imgtemp;
PictureBox width and height are divided with 2 to show the images half their original size.
private void prevImage()
if(selected == 0)
selected = folderFile.Length - 1;
selected = selected - 1; showImage(folderFile[selected]);
private void nextImage()
if(selected == folderFile.Length - 1)
selected = 0;
selected = selected + 1; showImage(folderFile[selected]);
To show the next and previous images, simply move the selected array mark to the next index or to previous index, respectively.
private void timer1_Tick(object sender, System.EventArgs e)
private void button4_Click(object sender, System.EventArgs e)
if(timer1.Enabled == true)
timer1.Enabled = false;
button4.Text = "<< START Slide Show >>";
timer1.Enabled = true;
button4.Text = "<< STOP Slide Show >>";
For the slide show function, call
nextImage() at the
timer1_tick, then just set
It is very easy to open, show, and slide show images. We just need to use
Timer and C# 2.0.
I hope this article is useful for everyone. Any comments are welcome!
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