List box1 to list box2 without duplication ?

SUNIL GUTTA

Hie

Help me do it

I want to use button's (i am willing to use 4 buttons i.e > , >> , < , << ) as an interface and want to perform items transfer between list boxes vice verse without duplication .

Once check the attachment . attached image :)

Thank you

2 Replies

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

Satyapriya Nayak13y ago
Accepted answer
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Move_items_from_one_listbox_other
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            listBox1.Items.Add("Raj");
            listBox1.Items.Add("Ravi");
            listBox1.Items.Add("Rahul");
            listBox1.Items.Add("Raju");
            listBox1.Items.Add("Rohit");
            listBox1.Items.Add("Rajesh");
        }

        private void button1_Click(object sender, EventArgs e)
        {

            listBox2.Items.Add(listBox1.SelectedItem);
            int i = 0;
            i = listBox1.SelectedIndex;
            listBox1.Items.RemoveAt(i);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            listBox1.Items.Add(listBox2.SelectedItem);
            int i = 0;
            i = listBox2.SelectedIndex;
            listBox2.Items.RemoveAt(i);

        }

        private void button3_Click(object sender, EventArgs e)
        {
            int j = 0;
            for (j = 0; j <= listBox1.Items.Count - 1; j++)
            {
                listBox2.Items.Add(listBox1.Items[j]);
            }
            listBox1.Items.Clear();
        }

        private void button4_Click(object sender, EventArgs e)
        {

            int j = 0;
            for (j = 0; j <= listBox2.Items.Count - 1; j++)
            {
                listBox1.Items.Add(listBox2.Items[j]);
            }
            listBox2.Items.Clear();
        }
    }
}

Thanks
If this post helps you mark it as answer
SUNIL GUTTA13y ago
Hi friend

Thank you so so much for reply & helping me out :) very grateful to you

Well in ur solution that is near perfect but you used FOR loop for all four button_event_proc which is not efficient as it can't handle Nulll values :)

so please replace your code of button 3 & 4 with this type using foreach loop

Button3_event_proc
foreach (object item in listBox1.Items)
{
listBox2.Items.Add(item.ToString());
}

Button4_evnt_proc
foreach (object item in listBox2.Items)
{
listBox1.Items.Add(item.ToString());
}

Thank you for reply once again

Hey but still exceptions are getting due to no i/p selected i am working n for loops of 1&2 buttons for possible replacement with foreach again :) if possible so then solution will be apt :)