Remove list item from list box

Question

Hi i have two listboxes(with Multi select option) in my form. i want to add selected list items from firstlist box into second list box. i wnt to restrict to add duplicate items. plase advice. thanks in advance. Regards Balu Reddy

Satyapriya Nayak · Answer

Hi Balureddy Another way... 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 WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender EventArgs e) { listBox1.Items.Add(Raj); listBox1.Items.Add(Raj); listBox1.Items.Add(Raju); listBox1.Items.Add(Rahul); listBox1.Items.Add(Harry); listBox1.Items.Add(Ben); listBox1.Items.Add(Ian); } private void btn_right_Click(object sender EventArgs e) { if (listBox2.Items.Contains(listBox1.SelectedItem) == true) { MessageBox.Show(Item Exits); } else { listBox2.Items.Add(listBox1.SelectedItem); int i = 0; i = listBox1.SelectedIndex; listBox1.Items.RemoveAt(i); } } private void btnleft_Click(object sender EventArgs e) { listBox1.Items.Add(listBox2.SelectedItem); int i = 0; i = listBox2.SelectedIndex; listBox2.Items.RemoveAt(i); } } } Thanks If this post helps you mark it as answer

Prabhu Raja · Answer

Hi satyapriya gives code for desktop application. if you need code sample for web application then visit this link. http://www.developergeekresources.com/examples/javascript/javascript-listbox_to_listbox.php

Satyapriya Nayak · Answer

Hi Balureddy 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; using System.Collections; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } 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 Form1_Load(object sender EventArgs e) { List input = new List (); input.Add(Raj); input.Add(Ravi); input.Add(Raju); input.Add(Rahul); input.Add(Raj); input.Add(Ravi); input.Add(Rahul); List result = removeDuplicates(input); foreach (string s in result) { listBox1.Items.Add(s); } } private static List removeDuplicates(List input) { Dictionary tmp = new Dictionary (); foreach (string s in input) tmp[s] = 1; return new List (tmp.Keys); } } } Thanks

Mayur Gujrathi · Answer

Try this

Vikas Mishra · Answer

Hi Kovvur....... For the above problem yuo should follow the following link........ http://www.java2s.com/Code/VB/GUI/Addremoveandclearlistboxitems.htm Thanks..........