In this blog we will know how to sort records in a dropdownlist.

Default.aspx code

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default" %>

<!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>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<div>

</div>

<asp:DropDownList ID="DropDownList1" runat="server">

</asp:DropDownList>

</form>

</body>

</html>

Default.aspx.cs code

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

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

{

protected void Page_Load(object sender, EventArgs e)

{

DropDownList1.Items.Add("Raj");

DropDownList1.Items.Add("Berry");

DropDownList1.Items.Add("Arun");

DropDownList1.Items.Add("Crish");

dropSort(DropDownList1);

}

private void dropSort( DropDownList objdropSort)

{

ArrayList t1 = new ArrayList();

ArrayList t2 = new ArrayList();

foreach (ListItem l1 in objdropSort.Items)

{

t1.Add(l1.Text);

}

t1.Sort();


 {

string value = objdropSort.Items.FindByText(ob1.ToString()).Value;

t2.Add(value);

}

objdropSort.Items.Clear();

for (int i = 0; i < t1.Count; i++)

{

ListItem t3 = new ListItem(t1[i].ToString(), t2[i].ToString());

objdropSort.Items.Add(t3);

}

}

}

Thanks for reading