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Bind or Insert Data into DropDownlist using List and ArrayList in ASP.NET C#
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="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="DropDownList1" runat="server" Height="39px" Width="212px">
</asp:DropDownList> <br/>
<asp:DropDownList ID="DropDownList2" runat="server" Height="39px" Width="212px">
</asp:DropDownList>
</div>
</form>
</body>
</html>
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";
DropDownList2.DataBind();
ArrayList listitem = new ArrayList();
listitem.Add("Apple");
listitem.Add("mango");
listitem.Add("Grapes");
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
//
}
}
1. Add two DropDownlist in the web form.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default11.aspx.cs" Inherits="Default11" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="DropDownList1" runat="server" Height="39px" Width="212px">
</asp:DropDownList> <br/>
<asp:DropDownList ID="DropDownList2" runat="server" Height="39px" Width="212px">
</asp:DropDownList>
</div>
</form>
</body>
</html>
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";
DropDownList2.DataBind();
ArrayList listitem = new ArrayList();
listitem.Add("Apple");
listitem.Add("mango");
listitem.Add("Grapes");
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
//
}
}
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