返回一个DataSet的例子

客户端

DataSet dscode = (DataSet)WebServiceHepler.WebServiceHepler.InvokeWebService(url + "NewGoodSet.asmx", "getGoodsCode", null);

服务端

  [WebMethod]
    public DataSet getGoodsCode()
    {
        return new Service().SelectCommon("BD_ProductCodeTab ", " PC_Code ", "1=1 Group By PC_Code Order By PC_Code");
    }

 [WebMethod]
    public DataSet SelectCommon(string strtblName, string strFields, string strWhere)
    {
        DataAccess da = new DataAccess();
        SqlConnection sqlConn = da.GetConnection();//数据库连接
        if (sqlConn.State != ConnectionState.Open) sqlConn.Open();//打开数据库连接
        SqlTransaction sqlTrans = sqlConn.BeginTransaction();//调用事务处理
        DataSet ds = new DataSet();
        try
        {


            SqlParameter[] commandParameters = new SqlParameter[3];
            commandParameters[0] = new SqlParameter("@tblName", SqlDbType.VarChar, 1000);
            commandParameters[0].Value = strtblName;
            commandParameters[1] = new SqlParameter("@strFields", SqlDbType.VarChar, 4000);
            commandParameters[1].Value = strFields;
            commandParameters[2] = new SqlParameter("@strWhere", SqlDbType.VarChar, 2000);
            commandParameters[2].Value = strWhere;
            ds = da.ExecuteDataset(da.GetConnStr(), CommandType.StoredProcedure, "P_Common_Select", commandParameters);
            //        ds = da.ExecuteDataset(da.GetConnStr(), CommandType.StoredProcedure, "P_Common_Insert_CArdInfor", commandParameters);
            sqlTrans.Commit();//提交事务
            sqlConn.Close();//关闭连接
            return ds;
        }
        catch (Exception ex)
        {
            sqlTrans.Rollback();//回传数据
            sqlConn.Close();//关闭连接
            throw ex;
            //  return 0;//有异常 
        }
    }