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Wednesday, October 2, 2013
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How to bind DropDownlist using AddRange method in ASP.NET

12:17 AMWednesday, October 2, 2013

Introduction

AddRange ( ) method 

Adds the items in an array of System.Web.UI..WebControls.ListItem objects to the collection or we can say add items to the array using list of item. Here we take a simple example for binding dropdownlist using list of item.
Step-1: Drop one DropDownlist to the design window.
Step-2: Take a array of ListItem also overload with ListItem class.
Step-3: Add item to the ListItem class constructor.
Step-4: Bind DropDownList using AddRange method.

Example of AddRange Method

Source Code
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<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" AutoPostBack="True"
            onselectedindexchanged="DropDownList1_SelectedIndexChanged">
        </asp:DropDownList>
        <br />
        <br />
        <asp:Label ID="Label1" runat="server"></asp:Label>
    </div>
    </form>
</body>

</html>

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

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        ListItem[] arr = new ListItem[]
        { new ListItem("apple", "20"),
            new ListItem("mango", "15"),
            new ListItem("orange", "30") };
             
        DropDownList1.Items.AddRange(arr);


    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        Label1.Text = "Your selected item detail are <br/>Item Text : " + DropDownList1.SelectedItem.Text + "<br/>Item value " + DropDownList1.SelectedValue;

    }

}

Output
How to bind DropDownlist using AddRange method in ASP.NET

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