// Example.aspx //
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Example.aspx.cs" Inherits="_Example" %>
<!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> Sort Datalist Using Dropdownlist</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DropDownList ID="DDLSorting" runat="server" AutoPostBack="True" onselectedindexchanged="DDLSorting_SelectedIndexChanged">
<asp:ListItem>Best Match</asp:ListItem>
<asp:ListItem>New Arrivals</asp:ListItem>
<asp:ListItem Value="3" Text="Price: Low to High"></asp:ListItem>
<asp:ListItem>Price: High to Low</asp:ListItem>
</asp:DropDownList>
</div>
</form>
</body>
</html>
// Example.aspx.cs //
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
public partial class Example : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
{
bindDropDownList();
}
private void bindDropDownList()
{
DropDownList1.DataTextField = "price";
DataList1.DataSourceID = null;
DataList1.DataSource = getReader();
DropDownList1.DataBind();
}
private SqlDataReader getReader()
{
SqlDataReader reader = null;
if(DropDownList1.Text == "-Select-")
{
string strConnectionString =
ConfigurationManager.ConnectionStrings["Pubs"].ConnectionString;
SqlConnection myConnect = new SqlConnection(strConnectionString);
string strCommandText ="SELECT * FROM [Category ] WHERE ID<= 20";
SqlCommand cmd = new SqlCommand(strCommandText, myConnect);
myConnect.Open();
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
else if (DropDownList1.SelectedValue == "Price - Highest to Lowest")
{
string strConnectionString =
ConfigurationManager.ConnectionStrings["Pubs"].ConnectionString;
SqlConnection myConnect = new SqlConnection(strConnectionString);
string strCommandText = "SELECT ID, packageName, price, description1, description2, image1, image2 FROM Category WHERE ID <= 20 ORDER BY price desc";
SqlCommand cmd = new SqlCommand(strCommandText, myConnect);
myConnect.Open();
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
else if (DropDownList1.DataTextField == "Price - Lowest to Highest")
{
string strConnectionString =
ConfigurationManager.ConnectionStrings["Pubs"].ConnectionString;
SqlConnection myConnect = new SqlConnection(strConnectionString);
string strCommandText = "SELECT ID, packageName, price, description1, description2, image1, image2 FROM Category WHERE ID <= 20 ORDER BY price";
SqlCommand cmd = new SqlCommand(strCommandText, myConnect);
myConnect.Open();
reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
return reader;
}
}
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