how i change query for different button

public static DataTable Getafile(int id)
        {
            DataTable dt = new DataTable();
            using (SqlConnection con = new SqlConnection())
            {
                OpenConnection(con);
                SqlCommand com = new SqlCommand();
                com.Connection = con;
                com.CommandTimeout = 0;
                com.CommandText = "SELECT ID, Name, [Content], size, data FROM Connectivity where ID=@ID";
                com.CommandType = CommandType.Text;
                SqlDataAdapter da = new SqlDataAdapter();
                com.Parameters.Add("@ID", SqlDbType.Int);
                com.Parameters["@ID"].Value = id;
                da.SelectCommand = com;
                da.Fill(dt);
                con.Close();


            }
            return dt;
        }