Error 'drdpStatusType' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value

Hi Santhosh,


Try this...

Create table Employees(StatusType varchar(50))


<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Dropdownlist_inside_gridview._Default" %>





   


   

   

       OnRowDataBound="GridView1_RowDataBound">













   

   

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_inside_gridview
{
    public partial class _Default : System.Web.UI.Page
    {
        string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        SqlDataAdapter sqlda = new SqlDataAdapter();
        SqlCommand com = new SqlCommand();
        DataTable dt;
      

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                bindgrid();
            }
        }
        private void bindgrid()
        {
            SqlConnection conn = new SqlConnection(connStr);
            dt = new DataTable();
            com.Connection = conn;
            com.CommandText = "SELECT * FROM Employees";
            sqlda = new SqlDataAdapter(com);
            sqlda.Fill(dt);
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }

        protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                Control ctrl = e.Row.FindControl("ddlTest");
                if (ctrl != null)
                {
                    DropDownList dd = ctrl as DropDownList;
                    SqlConnection conn = new SqlConnection(connStr);
                    dt = new DataTable();
                    com.Connection = conn;
                    com.CommandText = "SELECT * FROM Employees";
                    sqlda = new SqlDataAdapter(com);
                    sqlda.Fill(dt);
                    dd.DataTextField = "StatusType";
                    dd.DataValueField = "StatusType";
                    dd.DataSource = dt;
                    dd.DataBind();
                }
            }

        }
    }
}



Thanks