How do I select an item in listBox so as to create new directories?

[user033088]

What I want to do is, once I double click or select an item in a listbox it should create new directory/folder in a specific path. Below is the code for creating the listBox but I do not know how to create a double click event.

private void button1_Click(object sender, EventArgs e)
        {
 
            ListBox listBox1 = new ListBox();
 
            listBox1.Size = new System.Drawing.Size(200, 100);
            listBox1.Location = new System.Drawing.Point(10, 10);
 
 
            this.Controls.Add(listBox1);
 
            listBox1.MultiColumn = true;
 
            listBox1.SelectionMode = SelectionMode.MultiExtended;
 
            listBox1.BeginUpdate();
 
 
            for (int x = 1; x <= 10; x++)
            {
                listBox1.Items.Add("N-TYPE" + x.ToString());
            }
           the new items.
            listBox1.EndUpdate();
 
 
            listBox1.SetSelected(1, true);
            listBox1.SetSelected(3, true);
            listBox1.SetSelected(5, true);
 
 
            System.Diagnostics.Debug.WriteLine(listBox1.SelectedItems[1].ToString());
 
 
            System.Diagnostics.Debug.WriteLine(listBox1.SelectedIndices[0].ToString());
 
        }
 

Basically I want the "N-TYPE1" also to be some folder is "E:\\New Files"

so that would make it "E:\\New Files\\N-TYPE1";
and then I also want to create new directories once N-TYPE1 or N-TYPE2 is selected.

So now it would be
"E:\\New Files\\N-TYPE1\\New Settings"

Is there any solution to this? Am I headed in wrong direction?
Thank You in advance.

[Rabbit]

I don't know what you mean by "how to create a double click event". Such an event already exists, you just need to move your code there.

[user033088]

I am very new to C# so pardon my ignorance.
So now with this code I have N-TYPE1......N-TYPE10 items. Now, if I double click on N-TYPE1 I would want to create a new folder.
I have no clue to do this.
Thank You for your help.

[Rabbit]

I'm confused about what your question is. In your original post, you asked how to create a double click event. But it sounds like your question is really how to create a directory?

[vijay6]

Hey user033088

I changed one property of listBox1 in your code (listBox1.SelectionMode property). So at a time you can select only one item in listBox1.

private void button1_Click(object sender, EventArgs e)
{
 
listBox1 = new ListBox();
listBox1.Size = new Size(200, 100);
listBox1.Location = new Point(10, 10);
listBox1.MultiColumn = true;
//listBox1.SelectionMode = SelectionMode.MultiExtended;
listBox1.BeginUpdate();
 
listBox1.DoubleClick += listBox1_DoubleClick;
 
this.Controls.Add(listBox1);
 
for (int x = 1; x <= 11; x++)
{
listBox1.Items.Add("N-TYPE" + x.ToString());
}
 
}
 
void listBox1_DoubleClick(object sender, EventArgs e)
{
 
string path = "E:\\New Files";
 
string selecteditem = String.Empty;
 
if (listBox1.SelectedItems.Count > 0)
{
selecteditem = listBox1.SelectedItem.ToString();
 
if(!Directory.Exists(path + "\\" + selecteditem))
{
Directory.CreateDirectory(path + "\\" + selecteditem);
}
else
{
//Do nothing
}
 
listBox1.ClearSelected();
}

Code with explanations

private void button1_Click(object sender, EventArgs e)
{
 
listBox1 = new ListBox();
listBox1.Size = new Size(200, 100);
listBox1.Location = new Point(10, 10);
listBox1.MultiColumn = true;
//listBox1.SelectionMode = SelectionMode.MultiExtended;
listBox1.BeginUpdate();
 
// Whenever you double click listBox1, the following line will call listBox1_DoubleClick Event. This is how you've to write an event for all controls. To know more about how to create events for controls refer the following link. http://www.c-sharpcorner.com/UploadF...eControls.aspx
 
listBox1.DoubleClick += listBox1_DoubleClick;
 
this.Controls.Add(listBox1);
 
for (int x = 1; x <= 11; x++)
{
listBox1.Items.Add("N-TYPE" + x.ToString());
}
 
}
 
void listBox1_DoubleClick(object sender, EventArgs e)
{
 
string path = "E:\\New Files"; // This variable stores the parent path.
 
string selecteditem = String.Empty; // This variable is used to store the selected item's value in listBox1.
 
if (listBox1.SelectedItems.Count > 0) // This statement is used to check whether atleast one listBox1 item is selected or not.
{
selecteditem = listBox1.SelectedItem.ToString(); // In this line, the listBox1's selected item's value is stored to 'selecteditem' variable.
 
// For example assume you selected (Double Clicks) 'N-TYPE1' item in listBox1.
 
if(!Directory.Exists(path + "\\" + selecteditem)) // This line check whether 'N-TYPE1' folder exists or not in parent directory. i.e, Checks whether 'E:\\New Files\\N-TYPE1' already directory exists or not. If directory not exists means body of if statement will execute.
{
Directory.CreateDirectory(path + "\\" + selecteditem); // This directory will create 'N-TYPE1' folder inside 'E:\\New Files' directory.
}
else // You don't need else statement. If you want you can remove else block.
{
//Do nothing
}
 
listBox1.ClearSelected(); // This line will clear the selected item in listBox1.
}

Hope this may help you.

Have a nice day (:

[user033088]

Thank you so much for replying. I tried the code but I m pretty sure I am doing something wrong. So once I click Start a new ListBox pops up which shows all the items (N-TYPE1.....N-TYPE11), which is correct. But The doubleClick part gives me a error for where ever I am calling listBox1. It goes away only after I add a new ListBox from the toolbox. But still it wont create the directory. What is it that I am doing wrong. Please help me. I really appreciate it. Thanks.!!

[user033088]

@Rabbit: I am not good at explaining in English but yes that is what I am looking for. I want to create new Directory but only once I click any item in the ListBox.

[vijay6]

Hey user033088, If you get any error then post the error here then only others can understand. This is the code i wrote for your question. Try this code,

using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
 
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
 
        private Button button1;
        private ListBox listBox1;
 
        private string path;
        private string selecteditem;
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            path = "C:\\Users\\Public";
 
            button1 = new Button();
            button1.Text = "Create ListBox";
            button1.AutoSize = true;
            button1.Location = new Point(100, 150);
            button1.Click +=button1_Click;
            this.Controls.Add(button1);
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            listBox1 = new ListBox();
            listBox1.Size = new Size(200, 100);
            listBox1.Location = new Point(12, 12);
            listBox1.MultiColumn = true;
            //listBox1.SelectionMode = SelectionMode.MultiExtended;
            listBox1.BeginUpdate();
            listBox1.DoubleClick += listBox1_DoubleClick;
            this.Controls.Add(listBox1);
 
            for (int x = 1; x <= 11; x++)
            {
                listBox1.Items.Add("N-TYPE" + x.ToString());
            }
        }
 
        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            selecteditem = String.Empty;
 
            if (listBox1.SelectedItems.Count > 0)
            {
                selecteditem = listBox1.SelectedItem.ToString();
 
                if(!Directory.Exists(path + "\\" + selecteditem))
                {
                    Directory.CreateDirectory(path + "\\" + selecteditem);
                }
                else
                {
                    //Do nothing
                }
 
                listBox1.ClearSelected();
            }
        }
    }
}

[user033088]

Thank You sooo much. Its exactly what I was looking for!!!
Thanks.!!