GZDBHelper中GetDataSet方法，执行SQL语句，返回DataSet结构

 /// <summary>
/// 执行SQL语句，返回DataSet结构
/// </summary>
/// <param name="sql">SQL语句</param>
/// <param name="parameters">查询参数</param>
/// <returns></returns>
DataSet GetDataSet(string sql, IDbParms parameters);