protected void btnSearch_Click(object sender, EventArgs e)
 {
     using (SqlConnection con = new SqlConnection(_ConnStr))
     {
         using (SqlCommand cmd = new SqlCommand("SELECT * FROM Orders WHERE ORD_Date BETWEEN @From AND @To", con))
         {
             using (SqlDataAdapter da = new SqlDataAdapter(cmd))
             {
                 cmd.Parameters.AddWithValue("@From", Convert.ToDateTime(this.txtfromdate.Text));
                 cmd.Parameters.AddWithValue("@To", Convert.ToDateTime(this.txttodate.Text));
                 DataSet ds = new DataSet();
                 da.Fill(ds);
                 GridViewOrdersBuyer.DataSource = ds;
                 GridViewOrdersBuyer.DataBind();
             }
         }
     }
 }
        private void BindGridView()
        {
            SqlConnection con1 = new SqlConnection(_ConnStr);

            DataTable dt = new DataTable();

            con1.Open();

            SqlCommand     cmd = new SqlCommand("select *from Orders where ORD_BuyerUserID = '" + Session["M_Subscriber_UserID"] + "' ", con1);
            SqlDataAdapter sda = new SqlDataAdapter(cmd);

            sda.Fill(dt);
            GridViewOrdersBuyer.DataSource = dt;
            GridViewOrdersBuyer.DataBind();


            con1.Close();
        }