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ARTICLE

SQLDataReader Vs. DataSet

Posted by Arnold Park Articles | ADO.NET May 11, 2001
To compare and contrast SQLDataReader and SQLDataSetCommand.
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Objective:

To compare and contrast SQLDataReader and SQLDataSetCommand.

Target Audience:

ADO.NET programmer

Environment:

SQL2000, Visual studio .NET Beta 1
ibuyspy DataBase

Structure Of Table:

CREATE TABLE [dbo].[OrderDetails] (
[OrderID] [int] NOT NULL ,
[ProductID] [int] NOT NULL ,
[Quantity] [int] NOT NULL ,
[UnitCost] [money] NOT NULL
) ON [PRIMARY]
GO

CREATE TABLE [dbo].[Products] (
[ProductID] [int] IDENTITY (1, 1) NOT NULL ,
[CategoryID] [int] NOT NULL ,
[ModelNumber] [nvarchar] (50) COLLATE Korean_Wansung_CI_AS NULL ,
[ModelName] [nvarchar] (50) COLLATE Korean_Wansung_CI_AS NULL ,[ProductImage] [nvarchar] (50) COLLATE Korean_Wansung_CI_AS NULL ,
[UnitCost] [money] NOT NULL ,
[Description] [nvarchar] (3800) COLLATE Korean_Wansung_CI_AS NULL
) ON [PRIMARY]

Stored Procedure:

/* procedure name:NET_PopularProduct_SelectMaster
* objective :Weekly Best Items top 5
*/
CREATE PROCEDURE NET_PopularProduct_SelectMaster
as
BEGIN
select top 5 o.productid,sum(o.quantity) as total,p.modelname
from orderdetails o,products p
where o.productid=p.productid
group by o.productid,p.modelname
order by total desc
END

Source Code:

  1. Using SQLDataSetCommand

    Conn=new Common.DBConn();
    SQLDataSetCommand Comm=new SQLDataSetCommand("NET_PopularProduct_SelectMaster",Conn);
    Comm.SelectCommand.CommandType=CommandType.StoredProcedure;
    DataSet ds=new DataSet();
    Comm.FillDataSet(ds,"PopItems");
    return ds;

  2. Using SQLDataReader

    Conn=new Common.DBConn();
    SQLCommand Comm=new SQLCommand("NET_PopularProduct_SelectMaster",Conn);
    Comm.CommandType=CommandType.StoredProcedure;
    Conn.Open();
    Comm.Execute(out reader);
    DataTable table=new DataTable("Top5");
    table.Columns.Add(new DataColumn("Product_ID",typeof(System.Int32)));
    table.Columns.Add(new DataColumn("Quantity",typeof(System.Int32)));
    table.Columns.Add(new DataColumn("Product_Name",typeof(System.String)));
    while(reader.Read())
    {
    datarow=table.NewRow();
    datarow[0]=reader.GetInt32(0);
    datarow[1]=reader.GetInt32(1);
    datarow[2]=reader.GetString(2);
    table.Rows.Add(datarow);
    }
    Conn.Close();
    return table;

  3. Using SQLDataSetCommand 0.0550645255       0.0126954643     0.0131178647 (SEC) 
    Using SQLDataReader --     0.0105256364       0.0104242265     0.0105105508

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