About Gridview data binding when selecting dropdownlist item and search btn click give result...

String strConnString = ConfigurationManager.ConnectionStrings["con"].ConnectionString;

           SqlConnection con = new SqlConnection(strConnString);

           try
           {

           SqlCommand cmd = new SqlCommand();
           cmd.CommandType = CommandType.StoredProcedure;
           cmd.Parameters.AddWithValue("@Flag", 112);
           cmd.Parameters.AddWithValue("@Para1",SqlDbType.NVarChar).Value=secnm;
           cmd.CommandText = "spSelect";
           cmd.Connection = con;

            // Filling Data to Gridviewsearch in View3

                   con.Open();
                   SqlDataAdapter da = new SqlDataAdapter(cmd);
                   DataSet ds = new DataSet();
                   da.Fill(ds);

ELSE IF @Flag=112 
BEGIN
SELECT     Team.tcode, Team.tnm, Section1.sdesc
FROM         Team INNER JOIN
                      Section1 ON Team.sec_id = Section1.sec_id
WHERE     (Section1.sdesc = @Para1)
END