Dropdownlist seleted items in gridview

Satyapriyanayak
Posted by Satyapriyanayak under ASP.NET category on | Points: 40 | Views : 940
Table

Create table Contacts (id varchar(50),name varchar(50),city varchar(50))

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.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>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>

<asp:UpdatePanel ID="up1" runat="server">
<ContentTemplate >
<asp:Label ID="Label1" runat="server" Text="Choose Name" BackColor="#FFFF99"
ForeColor="Red" Width="100px"></asp:Label>

<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged" >
</asp:DropDownList>
</ContentTemplate>

<Triggers>
<asp:AsyncPostBackTrigger ControlID ="DropDownList1" />
</Triggers>
</asp:UpdatePanel>
<br />

<asp:UpdatePanel ID="up2" runat="server">
<ContentTemplate >
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>


</ContentTemplate>
<Triggers >
<asp:AsyncPostBackTrigger ControlID ="GridView1" />
</Triggers>
</asp:UpdatePanel>
<br />
</div>
</form>
</body>
</html>


using System;
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;
public partial class _Default : System.Web.UI.Page
{
string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlDataAdapter ad = new SqlDataAdapter();
SqlCommand cmd = new SqlCommand();
SqlDataAdapter sqlda;
DataSet ds;
string str;

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
str = "select * from Contacts where name like '" + DropDownList1.SelectedValue + "'";
cmd = new SqlCommand(str, conn);
sqlda = new SqlDataAdapter(cmd);
ds = new DataSet();
sqlda.Fill(ds, "Contacts");
conn.Close();
GridView1.DataSource = ds;
GridView1.DataMember = "Contacts";
GridView1.DataBind();
}
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection(connStr);
if (!IsPostBack)
{
DropDownList1.Items.Add("Choose name");
con.Open();
str = "select name from Contacts";
cmd = new SqlCommand(str, con);
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
DropDownList1.Items.Add(reader["name"].ToString());
}
reader.Close();
con.Close();
}
}
}

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