To clear loaded images in a picture box- C#

Arun E

Hello experts, Initially i will be loading images(say 20images) into a picture box from a specified folder through selection from combobox dropdown , they get loaded normally into picturebox. The problem i am facing is when i select the next folder to acquire the image for processing, the previously selected folders images are also displayed in the picturebox after its count only the next folders images are displayed, i am unable to clear the previously loaded images. To be specific, when i click on a folder from dropdown i want the particular folders image inside the picturebox i dont want the previously loaded images along with them. Am working in VS2013 with c#. Thanks in advance.

6 Replies

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Esakki Muthu10y ago
Accepted answer
Arun,
try the below code, it should work,
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
var fullpath = Path.Combine(@"C:\Users\Arun\Desktop\scanned", comboBox1.SelectedItem.ToString());
var di1 = new DirectoryInfo(fullpath);
comboBox2.DataSource = di1.GetDirectories();
}
private void button1_Click(object sender, EventArgs e)
{
pictureBox1.Image = null;
var alist = new List();
//Initially load all your image files into the array list when form load first time
var inputDir = new System.IO.DirectoryInfo(Path.Combine(@"C:\Users\Arun\Desktop\scanned", comboBox1.SelectedItem.ToString(), comboBox2.SelectedItem.ToString())); //Source image folder path
try
{
if ((inputDir.Exists))
{
//Get Each files
foreach (var file in inputDir.GetFiles())
{
if (file.Extension == ".tif" || file.Extension == ".jpg")
alist.Add(file.FullName); //Add it in array list
}
pictureBox1.Image = Image.FromFile(alist[0].ToString()); //Display intially first image in picture box as sero index file path
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
}
}
catch (Exception ex)
{
}
}
Arun E10y ago
Thank you so much sir @Esakki Muthu , that worked.But now we are unable to toggle between the images the next and previous buttons are not functioning due to the changes made , i am unable to figure the trick out of it.
We have tried so,
namespace es
{
public partial class Form1 : Form
{

int i = 0;
int filelength = 0;
private Image Img;

public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
DirectoryInfo di = new DirectoryInfo(@"C:\Users\Arun\Desktop\scanned");
DirectoryInfo[] folders = di.GetDirectories();
comboBox1.DataSource = folders;
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
var fullpath = Path.Combine(@"C:\Users\Arun\Desktop\scanned", comboBox1.SelectedItem.ToString());
var di1 = new DirectoryInfo(fullpath);
comboBox2.DataSource = di1.GetDirectories();
}
private void button1_Click(object sender, EventArgs e)
{
pictureBox1.Image = null;
var alist = new List();
//Initially load all your image files into the array list when form load first time
var inputDir = new System.IO.DirectoryInfo(Path.Combine(@"C:\Users\Arun\Desktop\scanned", comboBox1.SelectedItem.ToString(), comboBox2.SelectedItem.ToString())); //Source image folder path
try
{
if ((inputDir.Exists))
{
//Get Each files
foreach (var file in inputDir.GetFiles())
{
if (file.Extension == ".tif" || file.Extension == ".jpg")
alist.Add(file.FullName); //Add it in array list
filelength = filelength + 1;
}
pictureBox1.Image = Image.FromFile(alist[0].ToString()); //Display intially first image in picture box as sero index file path
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
i = 0;
}
}
catch (Exception ex)
{
}
}
private void button2_Click(object sender, EventArgs e)//to move to next image
{
var alist = new List();
if (i + 1 < filelength)
{
pictureBox1.Image = Image.FromFile(alist[i + 1].ToString());
i = i + 1;
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
}
}
private void button3_Click(object sender, EventArgs e)// to move to previous image
{
if (i - 1 >= 0)
{
var alist = new List();
pictureBox1.Image = Image.FromFile(alist[i - 1].ToString());
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
i = i - 1;
}
}
}
}
@Esakki Muthu Thanks in advance
Arun E10y ago
@Esakki Muthu
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
string selected = comboBox1.SelectedItem.ToString();
String fullpath = Path.Combine(@"C:\Users\Arun\Desktop\scanned", selected);
DirectoryInfo di1 = new DirectoryInfo(fullpath);
DirectoryInfo[] folders1 = di1.GetDirectories();
comboBox2.DataSource = folders1;

}

private void button9_Click(object sender, EventArgs e)
{

string selected1 = comboBox1.SelectedItem.ToString();
string selected2 = comboBox2.SelectedItem.ToString();

//Initially load all your image files into the array list when form load first time
System.IO.DirectoryInfo inputDir = new System.IO.DirectoryInfo(Path.Combine(@"C:\Users\Arun\Desktop\scanned", selected1, selected2)); //Source image folder path

try
{

if ((inputDir.Exists))
{

//Get Each files
System.IO.FileInfo file = null;
foreach (System.IO.FileInfo eachfile in inputDir.GetFiles())
{
file = eachfile;
if (file.Extension == ".tif")
{
alist.Add(file.FullName); //Add it in array list
filelength = filelength + 1;
}
else if(file.Extension == ".jpg")
{
alist.Add(file.FullName); //Add it in array list
filelength = filelength + 1;
}
}

pictureBox1.Image = Image.FromFile(alist[0].ToString()); //Display intially first image in picture box as sero index file path
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
i = 0;

}
}
catch (Exception ex)
{

}

}
Esakki Muthu10y ago
Hey Arun,
Can you provide your code
Arun E10y ago
I am using a button which on selection will display the images to the picture box. I dint get my problem solved through picturebox1,image = null; @Esakki Muthu
Esakki Muthu10y ago
Hi Arun,
First assign null to the picturebox in the combobox selection event , before you map the new folder path info.
pictureBox1.Image = Null;