اول بالای فرم متغیر ها رو گلوبال تعریف تعریف میشود
string[] filename;
int tedad = 0;
int feli = 0;
بعد این هم کد ها
private void button2_Click(object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
filename = openFileDialog1.FileNames;
tedad = openFileDialog1.FileNames.Length;
feli = 0;
pictureBox1.ImageLocation = openFileDialog1.FileNames[feli];
}
}
private void button3_Click(object sender, EventArgs e)
{
if (feli < tedad-1)
{
feli += 1;
pictureBox1.ImageLocation = openFileDialog1.FileNames[feli ];
}
}
private void button4_Click(object sender, EventArgs e)
{
if (feli > 0)
{
feli -= 1;
pictureBox1.ImageLocation = openFileDialog1.FileNames[feli];
}
}