A Drop Down Inside a Grid View

Drop Down Inside a GridView

Thanks :Mudassar Ahmed Khan http://www.aspsnippets.com/Articles/How-to-populate-DropDownList-in-GridView-in-ASPNet.aspx

aspx page :

<%@ Page Title="Home Page" Language="C#" CodeBehind="Default.aspx.cs" Inherits="Indexers2._Default" %>

<form id="form1" runat="server">
    <asp:GridView ID = "grdView"
               runat = "server"
         CellPadding = "5"
        AutoGenerateColumns="false"
        >
        <Columns>
        <asp:BoundField HeaderText="Name" DataField="CONTACTNAME" />
        <asp:TemplateField HeaderText="Country">
            <ItemTemplate>
            <asp:DropDownList ID    =   "drpdwnlst"
                              runat =   "server"
              >
            </asp:DropDownList>
            </ItemTemplate>
        </asp:TemplateField>
        </Columns>

    </asp:GridView>

</form>

C# Code Behined

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Indexers2
{ public partial class _Default : Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                //EVENT DELEGAT//
                grdView.RowDataBound += grdView_RowDataBound;
                grdView.DataSource = GetData("SELECT CONTACTNAME,COUNTRY FROM people");
                grdView.DataBind();

            }

        }

        void grdView_RowDataBound(object sender, GridViewRowEventArgs e)
        {

            if(e.Row.RowType==DataControlRowType.DataRow)
            {

              /* DROPDOWNLIST BEING POPULATED FROM THE DATABASE .EVEN IF THE DROP DOWN IS INSIDE A GRID VIEW*/
              /* ON ROW DATA BOUND ONLY WE HAVE TO ACCESS THE VALUE USING GRIDVIEWROWEVENTARS OBJECT*/
                DropDownList drpcountries=(e.Row.FindControl("drpdwnlst") as DropDownList);
                drpcountries.DataSource=GetData("SELECT DISTINCT COUNTRY from people");
                drpcountries.DataTextField="Country";
                drpcountries.DataValueField="Country";
                drpcountries.DataBind();

                drpcountries.Items.Insert(0,new ListItem("Please Select"));


              /* CODE TO SHOW WHEN VALUE FROM DATABASE NEEDS TO BE SHOWED IN THE DROPDOWN LIST*/
              // string country=(e.Row.FindControl("Country") as Label).Text;
              // drpcountries.Items.FindByValue(country).Selected=true;
            }
        }

        public DataSet GetData(String sqlstmt)
        {
            string constring = ConfigurationManager.ConnectionStrings["ConnectionStringTest"].ConnectionString;
            SqlCommand cmd= new SqlCommand(sqlstmt);
            using (SqlConnection conn=new SqlConnection(constring))
            {
                using(SqlDataAdapter sda=new SqlDataAdapter())
                {
                    cmd.Connection=conn;
                    sda.SelectCommand=cmd;
                    using(DataSet ds= new DataSet())
                    {
                        sda.Fill(ds);
                        return ds;
                     }

                 }
            }

        }
    }
}

DataBase Script

create table people
(
CONTACTNAME varchar(30),
COUNTRY varchar(30)
)

INSERT INTO people values('AMIT','INDIA');
INSERT INTO people values('AJAY','INDIA');
INSERT INTO people values('AJIT','INDIA');
INSERT INTO people values('AJIT_K','INDONESIA');
INSERT INTO people values('AJIT_M','BURMA');

WebConfig file

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