ComboBox selection from other comboBox input.

I am working on windows application. I am using 2 comboboxes, where first comboBox1 lists all the folders in the physical directory and comboBox2 lists all the files(images) from the folders listed in comboBox1, when particular folder name is selected from comboBox1 to be displyed in pictureBox.

I am trying to figure out the way to list all the files from the folder in comboBox2 for every available folder

Any suggestions and help is appreciated?

ComboBox1: Lists all the folders from physical location.(Works fine)

ComboBox2 lists all files when folder from comboBox1 is selected.

As number of folders are not fixed, I am looking for some loop.

private void Marriage_Load(object sender, EventArgs e)

{

DirectoryInfo di = new DirectoryInfo(@"\\Phhistmsimgid02\CAMR");

paths = new String[di.GetDirectories().Count()];

// MessageBox.Show(paths.Length + "");

int i = 0;

foreach (DirectoryInfo fi in di.GetDirectories())

{

comboBox1.Items.Add(fi.Name);

}

foreach (DirectoryInfo fi in di.GetDirectories())

{

paths[i] = fi.FullName;

i++;

comboBox2.Sorted = true;

}

comboBox1.SelectedIndex = 0;

}

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

{

DirectoryInfo dinf = new DirectoryInfo(@"\\Phhistmsimgid02\CAMR\M07201400802");

paths = new String[dinf.GetFiles().Count()];

int i = 0;

comboBox2.Items.Clear();

pictureBox2.Image = Image.FromFile(@"\\Phhistmsimgid02\CAMR\M07201400802\SCN0001.tif");

foreach (FileInfo finf in dinf.GetFiles())

{

comboBox2.Items.Add(finf.Name);

var count = comboBox2.Items.Count;

//MessageBox.Show("Count is:" + count);

}

foreach (FileInfo finf in dinf.GetFiles())

{

paths[i] = finf.FullName;

i++;

}

} // this part works fine if I mention each folder manually.

Any suggestions and help appreciated.

Is this what you are looking for?

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.IO;

namespace csharpcornform

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

DirectoryInfo di = new DirectoryInfo(@"C:\Users\Raghav\Pictures");

string[] paths = new String[di.GetDirectories().Count()];

foreach(DirectoryInfo fi in di.GetDirectories())

{

comboBox1.Items.Add(fi.Name);

}

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

{

foreach(string fileName in Directory.GetFiles(@"C:\Users\Raghav\Pictures\" + comboBox1.Text, "*.png")) //so all filenames ending with .png (you can add more, upto your requirements)

{

comboBox2.Items.Add(fileName);

}

private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)

{

this.pictureBox1.ImageLocation = comboBox2.Text;

pictureBox1.Refresh();

}

}

Result:

Pick a folder in comboBox1
All images ending with ".png" in the folder will be added to comboBox2.
After I select an image in comboBox2, picturebox image location will change to that picture and refresh, displaying the picture selected in comboBox2 :)

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Raghav Jhavar10y ago
Is this what you are looking for?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;

namespace csharpcornform
{
   public partial class Form1 : Form
   {
      public Form1()
      {
         InitializeComponent();
      }
      private void Form1_Load(object sender, EventArgs e)
      {
         DirectoryInfo di = new DirectoryInfo(@"C:\Users\Raghav\Pictures");
         string[] paths = new String[di.GetDirectories().Count()];
         foreach(DirectoryInfo fi in di.GetDirectories())
         {
            comboBox1.Items.Add(fi.Name);
         }
      }
      private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
      {
         foreach(string fileName in Directory.GetFiles(@"C:\Users\Raghav\Pictures\" +          comboBox1.Text, "*.png")) //so all filenames ending with .png (you can add more, upto your          requirements)
         {
            comboBox2.Items.Add(fileName);
         }
      }
      private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
      {
         this.pictureBox1.ImageLocation = comboBox2.Text;
         pictureBox1.Refresh();
      }
   }
}

Result:

Pick a folder in comboBox1
All images ending with ".png" in the folder will be added to comboBox2.
After I select an image in comboBox2, picturebox image location will change to that picture and refresh, displaying the picture selected in comboBox2 :)