Show related items in gridview when dropdownlist is selected

Satyapriyanayak
Posted by Satyapriyanayak under ASP.NET category on | Points: 40 | Views : 981
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Dropdownlist_gridview._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:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList><br />
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</div>
</form>
</body>
</html>


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 Dropdownlist_gridview
{
public partial class _Default : System.Web.UI.Page
{
string strConnString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlCommand com;
SqlDataAdapter sqlda;
DataSet ds;
string str;


protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(strConnString);
if (!IsPostBack)
{
DropDownList1.Items.Add("Choose Id");
con.Open();
str = "select * from employee";
com = new SqlCommand(str, con);

SqlDataReader reader = com.ExecuteReader();
while (reader.Read())
{
DropDownList1.Items.Add(reader["empid"].ToString());
}
reader.Close();
con.Close();
}
}

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(strConnString);
con.Open();
str = "select * from employee where empid='" + DropDownList1.SelectedItem.Text + "'";
com = new SqlCommand(str, con);
sqlda = new SqlDataAdapter(str,con);
ds = new DataSet();
sqlda.Fill(ds, "employee");
GridView1.DataMember = "employee";
GridView1.DataSource = ds;
GridView1.DataBind();
con.Close();
}
}
}

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