Bind or Insert Data into DropDownlist using List and ArrayList in ASP.NET C#

January 05, 2016 , 0 Comments

In this article, I will show ou how to bind or insert items into Dropdownlist Using ArrayList or List in code behind file. ArrayList is a Collection of String items so it can contain string items Bydefault But in List<type> we have to specify type of items. In this article, I will take list as class type. I will give you an example of both. I am giving  you a youtube video:

1. Add two DropDownlist in the web form.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default11.aspx.cs" Inherits="Default11" %>

<!DOCTYPE html>

<html xmlns="">
<head runat="server">
    <form id="form1" runat="server">

        <asp:DropDownList ID="DropDownList1" runat="server" Height="39px" Width="212px">
        </asp:DropDownList>  <br/>

<asp:DropDownList ID="DropDownList2" runat="server" Height="39px" Width="212px">


2. In the code behind file, I will provide you both ArrayList and List<type>. 

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default11 : System.Web.UI.Page

    protected void Page_Load(object sender, EventArgs e)
        if (!Page.IsPostBack)
            List<fruits> fitems = new List<fruits>();
            fitems.Add(new fruits(){FruitID=1,FruitName="Apple"});
            fitems.Add(new fruits() { FruitID = 2, FruitName = "Mango" });

DropDownList2.DataSource = fitems;
            DropDownList2.DataTextField = "FruitName";
            DropDownList2.DataValueField = "FruitID";

ArrayList listitem = new ArrayList();


            foreach (object item in fitems)
                DropDownList1.Items.Add(new ListItem(item.ToString(), item.ToString()));


fruits.cs file

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Summary description for fruits
/// </summary>
public class fruits
    public int FruitID { get; set; }
    public string FruitName { get; set; }
public fruits()
// TODO: Add constructor logic here

Jacob Lefore

Some say he’s half man half fish, others say he’s more of a seventy/thirty split. Either way he’s a fishy bastard. Google