How to add Selected Item from ComboBox to ListBox in Windows form

Introduction

In my previous post we have been bind DropdownList using Complex datatype . Today we will learn how to add Selected Item from ComboBox to ListBox on button click event. follow some steps for add items to ListBox.

Step-1: Take a class file with some fields in the application.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace CoffieShop

{

class CoffieShop

{

public string Product_Name { get; set; }

public decimal price { get; set; }

}

Step-2: Drop a ComboBox control to the design window.

Step-3: Create a instance of the List class also bind list with the class.

namespace CoffieShop

{

public partial class Form1 : Form

{

List<CoffieShop> item = new List<CoffieShop>();

}

Step-4: Initiate class fields with some value and add to the List in Form_Load Event

public Form1()

{

item.Add(new CoffieShop() { Product_Name = "pizza", price = 12.12M });

item.Add(new CoffieShop() { Product_Name = "burger", price = 15.12M });

InitializeComponent();

}

Step-5: Drop One Button Control to the Design window

Step-6: Add selected item from ComboBox to ListBox control on Button_Click Event

private void button3_Click(object sender, EventArgs e)

{

var pro = comboBox1.SelectedItem as CoffieShop;

listBox1.Items.Add(pro);

listBox1.DisplayMember = "Product_Name";

}

Complete code

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 CoffieShop
{
public partial class Form1 : Form
{
List<CoffieShop> item = new List<CoffieShop>();

public Form1()
{
item.Add(new CoffieShop() { Product_Name = "pizza", price = 12.12M });
item.Add(new CoffieShop() { Product_Name = "burger", price = 15.12M });

InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
comboBox1.DataSource = item;
comboBox1.DisplayMember = "Product_Name";
}

private void button3_Click(object sender, EventArgs e)
{
var pro = comboBox1.SelectedItem as CoffieShop;
listBox1.Items.Add(pro);
listBox1.DisplayMember = "Product_Name";

}

}
}

Output