In this article we will learn about Paging with a DropDownList in ASP.NET. Here runtime numbers will be shown in the DropDownList; when we choose a number, that number of records will be shown in the GridView. Here paging facilities are also provided to the GridView.
Table Creation
![paging.jpg]()
Default.aspx code
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Paging_with_dropdownlist._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>
<asp:GridView id="g1" Runat="Server"
AllowPaging="True"
AutoGenerateColumns="true" onpageindexchanging="g1_PageIndexChanging" PagerStyle-Visible = "False" HeaderStyle-BackColor="Red"
HeaderStyle-ForeColor="White" BackColor="#FFCC66">
<HeaderStyle BackColor="Red" ForeColor="White"></HeaderStyle>
<AlternatingRowStyle BackColor="#FFFFCC" />
</asp:GridView>
<asp:Label ID="Label1" runat="server" Text="Choose No." Font-Bold="True"
ForeColor="#CC3300"></asp:Label>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" onselectedindexchanged="DropDownList1_SelectedIndexChanged">
<asp:ListItem Text="5" Value="5"></asp:ListItem>
<asp:ListItem Text="10" Value="10"></asp:ListItem>
<asp:ListItem Text="15" Value="15"></asp:ListItem>
<asp:ListItem Text="20" Value="20"></asp:ListItem>
</asp:DropDownList>
</div>
</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;
using System.Data.SqlClient;
namespace Paging_with_dropdownlist
{
public partial class _Default : System.Web.UI.Page
{
string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlCommand com;
SqlDataAdapter sqlda;
DataSet ds;
string str;
int size = 0;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DropDownList1.Items.Insert(0, ("Select"));
}
}
void bindgrid()
{
SqlConnection con = new SqlConnection(connStr);
con.Open();
str = "select * from employee";
com = new SqlCommand(str, con);
sqlda = new SqlDataAdapter(com);
ds = new DataSet();
sqlda.Fill(ds, "employee");
g1.DataMember = "employee";
g1.DataSource = ds;
g1.DataBind();
con.Close();
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
if (DropDownList1.SelectedItem.Text != "0")
{
size = int.Parse(DropDownList1.SelectedItem.Value.ToString());
g1.PageSize = size;
bindgrid();
}
}
protected void g1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
g1.PageIndex = e.NewPageIndex;
bindgrid();
}
}
}
Output
![paging1.jpg]()
![paging2.jpg]()
![paging3.jpg]()