public List<Center> GetCenterAccordingToThana(int id)
        {
            List<Center> centerList = new List<Center>();

            SqlConnection connection = new SqlConnection(connectionstring);

            string query = "SELECT center_Id,center_Name FROM Table_Center WHERE center_ThanaId='" + id + "'";

            SqlCommand command = new SqlCommand(query, connection);

            connection.Open();

            SqlDataReader reader = command.ExecuteReader();

            while (reader.Read())
            {
                Center center = new Center();
                center.Id = int.Parse(reader["center_Id"].ToString());
                center.Name = reader["center_Name"].ToString();

                centerList.Add(center);

            }
            reader.Close();
            connection.Close();

            return centerList;
        }
        public string Insert(Center center)
        {
            if (center.Name == "")
            {
                return "center name is missing";
            }

            else
            {

                int value = centerGateway.Insert(center);

                if (value > 0)
                {
                    return "Saved Successfully";
                }

                else
                {
                    return "Operation Failed";
                }
            }
        }
        public string Insert(Center center)
        {
            if (center.Name == "")
            {
                return "center name is missing";
            }

            else if (centerGateway.HasThisCenterNameExists(center.Name, center.ThanaId))
            {
                return "This center is already exists under this thana ,please try again";
            }

            else
            {

                int value = centerGateway.Insert(center);

                if (value > 0)
                {
                    return "Saved Successfully";
                }

                else
                {
                    return "Operation Failed";
                }
            }
        }
        public int Insert(Center center)
        {
            SqlConnection connection = new SqlConnection(connectionstring);

            string query = "INSERT INTO Table_Center VALUES('" + center.Name + "','" + center.Code + "','" + center.Password + "','" + center.DistrictId + "','" + center.ThanaId + "')";

            SqlCommand command = new SqlCommand(query, connection);

            connection.Open();

            int rowsAffected = command.ExecuteNonQuery();

            connection.Close();

            return rowsAffected;
        }