How to Correctly Retrieve Data from Stored Procedures in Classic ASP?

Classic ASP and Stored Procedures: Efficient Data Retrieval

Retrieving data from stored procedures within Classic ASP applications often presents challenges. This article addresses a common problem where stored procedure execution fails to populate a recordset, resulting in an empty or incorrect response.

The Problem: Empty Recordsets

Developers frequently encounter situations where their Classic ASP code, designed to retrieve data from a stored procedure, returns an empty recordset. The database command appears correct, yet the expected data remains inaccessible.

Code Example and Analysis

Let's examine a typical code snippet illustrating this issue:

Set conn = Server.CreateObject("ADODB.Connection")
conn.open "PROVIDER=SQLOLEDB;DATA SOURCE=X;DATABASE=Y;UID=Z;PWD=W;"
Set objCommandSec = CreateObject("ADODB.Command")
With objCommandSec
    Set .ActiveConnection = Conn
    .CommandType = 4
    .CommandText = "usp_Targets_DataEntry_Display"
    .Parameters.Append .CreateParameter("@userinumber ", 200, 1, 10, inumber)
    .Parameters.Append .CreateParameter("@group ", 200, 1, 50, "ISM")
    .Parameters.Append .CreateParameter("@groupvalue", 200, 1, 50, ismID)
    .Parameters.Append .CreateParameter("@targettypeparam ", 200, 1, 50, targetType)
End With

set rs = Server.CreateObject("ADODB.RecordSet")
rs = objCommandSec.Execute

while not rs.eof
    response.write (1)
    response.write (rs("1_Q1"))
    rs.MoveNext
wend
response.write (2)

The Solution: Correct Recordset Handling

The core problem lies in this line:

rs = objCommandSec.Execute

This incorrect assignment prevents proper data retrieval. The corrected approach is:

set rs = Server.CreateObject("ADODB.RecordSet")
rs.open objCommandSec

By using rs.open objCommandSec, we correctly open the recordset using the command object, enabling data retrieval.

Best Practices for Stored Procedure Interaction

Here are some recommended practices to improve the efficiency and reliability of your Classic ASP code interacting with stored procedures:

• Direct Connection within Command: Instead of creating and opening a separate ADODB.Connection, directly assign the connection string to the .ActiveConnection property of the ADODB.Command object. This simplifies the code and improves performance.

• SET NOCOUNT ON: For stored procedures performing INSERT or UPDATE operations, include SET NOCOUNT ON in your SQL code. This prevents the stored procedure from returning a count of affected rows, which can lead to a prematurely closed recordset.

• Consider Arrays for Simplicity: For simpler data handling, consider using arrays instead of ADODB.Recordset for iterating through the results. This can often lead to more efficient and readable code.

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