Solved

Get  ADO recordset from Access query with parameters.

Posted on 2001-07-24
10
235 Views
Last Modified: 2010-05-02
I need help to get ADO recorset from query "qryTest" in VB.

Query was created in NorthWind.
Here you are SQL view:

SELECT Employees.FirstNAME, Employees.LastName
FROM Employees
WHERE (Employees.FirstNAME Like [FName] & "*" Or [FName]="") AND
(Employees.LastNAME Like [LName] & "*" Or [LName]="");


"qryTest"  has two parameters: [FName] and [LName].


In VB project I developed very simple code:


Public Sub main()
 Dim conn As ADODB.Connection
 Dim cmd As ADODB.Command
 Dim rs As ADODB.Recordset, paramFname As Parameter
 dim paramLname As Parameter
 Set conn = New ADODB.Connection
 Set cmd = New ADODB.Command
 
 
 conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
 Data Source=" & App.Path & "\northWind.mdb; Jet OLEDB;"
 Set cmd.ActiveConnection = conn

 cmd.CommandText = "qryTest"
 cmd.CommandType = adCmdStoredProc
 Set paramFname = cmd.CreateParameter("FName", _          adVarChar, adParamInput, 10, "a")
 cmd.Parameters.Append paramFname
 Set paramLname = cmd.CreateParameter("LName", _  adVarChar, adParamInput, 20, "")
 cmd.Parameters.Append paramLname
  Set rs = cmd.Execute(, cmd.Parameters)

 Debug.Print rs.Fields(1)
End Sub

I know, there are records there(in NorhWind),
 but RS.eof=true, I could not get any records with any values of parameters(FName or LName)

What is wrong with this code?
0
Comment
Question by:orrarr
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
  • 2
  • +1
10 Comments
 
LVL 7

Expert Comment

by:Z_Beeblebrox
ID: 6314962
Not sure but I believe wildcards only work at the beginning of strings.

Zaphod.
0
 
LVL 75

Accepted Solution

by:
Anthony Perkins earned 50 total points
ID: 6315746
Are you sure you don't have On Error Resume Next somewhere?

The reason I ask is that the line:
Set rs = cmd.Execute(, cmd.Parameters)

Should just be:
Set rs = cmd.Execute

The parameters argument is for a variant array of parameter values not the Parameter collection.

Other than that it seems OK.
0
 
LVL 3

Expert Comment

by:Rem
ID: 6316163
Zaphod

Wildcards work all the way

"SELECT * from YourTable WHERE YourField Like '%" & frm.YourField.Text & "%'"

Bye

Rem
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 7

Expert Comment

by:Z_Beeblebrox
ID: 6316191
Maybe I was thinking of MSSQL then, I know one of the common DB's has this limit....

Zaphod.
0
 
LVL 75

Expert Comment

by:Anthony Perkins
ID: 6318268
Zaphod,

You are probably thinking of the following KB article
INFO: ADO's Find and Filter Support Usage of Wildcards (Q226119)

An in particular the following:

%example is NOT supported (ends with):

rs.Find "MyField Like '%St'", 0, adSearchForward, ADODB.adBookmarkCurrent

But this does not apply in this case as the Find method is not used.

Anthony
0
 
LVL 7

Expert Comment

by:Z_Beeblebrox
ID: 6320373
Ah yeah, that must have been it.

Thanks,

Zaphod.
0
 

Author Comment

by:orrarr
ID: 6323983
Acperkins,

Did You try to run this code with "Set rs = cmd.Execute"?
Could you please, copy & paste query into NorthWind - save as "QryTest,copy & paste VB code into new VB project, get reference ADO 2.5 and run this code.
I'm getting "rs.eof=true" Error
What about You???

Thanks.

P.S. This query is working fine in Access.

0
 
LVL 3

Expert Comment

by:Rem
ID: 6324040
Hi,

Replace your wildcards (*) with % (percentage sign.
The query won't run in access but will work when run through your vb programme.

OLEDB 4.0 acts like a reel SQL database.

This should work.
I ran into the same "bug" while copying a access query into my vb code. (ie rs.EOF)

C U

Rem
0
 
LVL 3

Expert Comment

by:Rem
ID: 6324108
Hi,

Replace your wildcards (*) with % (percentage sign.
The query won't run in access but will work when run through your vb programme.

OLEDB 4.0 acts like a reel SQL database.

This should work.
I ran into the same "bug" while copying a access query into my vb code. (ie rs.EOF)

C U

Rem
0
 
LVL 3

Expert Comment

by:Rem
ID: 6324116
Don't know what went wrong, but sorry for the double input.
0

Featured Post

[Webinar] How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Most everyone who has done any programming in VB6 knows that you can do something in code like Debug.Print MyVar and that when the program runs from the IDE, the value of MyVar will be displayed in the Immediate Window. Less well known is Debug.Asse…
Enums (shorthand for ‘enumerations’) are not often used by programmers but they can be quite valuable when they are.  What are they? An Enum is just a type of variable like a string or an Integer, but in this case one that you create that contains…
As developers, we are not limited to the functions provided by the VBA language. In addition, we can call the functions that are part of the Windows operating system. These functions are part of the Windows API (Application Programming Interface). U…
Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
Suggested Courses
Course of the Month10 days, 10 hours left to enroll

628 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question