Solved

Trying to run the HelloData example

Posted on 2002-05-13
10
462 Views
Last Modified: 2008-01-09
I am trying to run the HelloData example from Microsoft in Vusial Studio / Visual Basic.net. The MSDN link is http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ado270/htm/mdtuthellodata.asp . The ADODB enums are not being reconized. For example:

C:\HelloData\HelloData\Form1.vb(159): Name 'adCmdText' is not declared.

Cant figure out how to get them reconized without fully qiualifing the enum (e.g., ADODB.CursorTypeEnum.adOpenStatic instead of adOpenStatic). This is especially a pain, since its not always obvious what the qualification should be. Im sure there is an easy solution.. what is it?!

Thanks
Austin.
0
Comment
Question by:AustinKalb
  • 5
  • 5
10 Comments
 
LVL 22

Expert Comment

by:rspahitz
ID: 7006971
Generally errors like that appear when you are missing a reference, in this case most likely missing the reference to the ADO.net object.
0
 

Author Comment

by:AustinKalb
ID: 7006991
no so easy... in the References limb of the Solution Explorer is the reference to ADODB (Description: Microsoft ActiveX Data Objects 2.7 Library). Note that when I replace the enum with the fully qualified enum - I no longer get the "not declared" mesage - and the ado statement works fine.

The only potentially funny thing is that while the reference said msado15.dll whe i was selecting it, after its included in the project the "Path" points to C:\WINNT\assembly\GAC\ADODB\7.0.3300.0__b03f5f7f11d50a3a\ADODB.dll
0
 
LVL 22

Expert Comment

by:rspahitz
ID: 7006999
I really haven't tried .net yet, but in VB you could right-click on an item and one of it's choices was 'definition'.

Obviously, if the item cannot be qualified by VB, it thinks it's undefined.

Since there reference originally pointed to msado15.dll, maybe you need to remove that reference and locate and add the correct one.  I'm starting to think that there may be a conflict in the names...i.e. the missing reference is in an upgraded version of the dll and the app is referencing the old one.
0
Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

 

Author Comment

by:AustinKalb
ID: 7007039
the new reference may well be associated with visual basic . net. what do you think i should try next?
0
 
LVL 22

Expert Comment

by:rspahitz
ID: 7007076
Since I don't have .net available right now, I can't reproduce the problem, and maybe other experts will chime in shortly.

Meanwhile, how are you running the example?  Did you install .net in a new folder?  Do you also have VB6?

Maybe for now you can simply define adCmdText with a value=1 since that's the value in VB6.

Did you also go to the link on the webpage you mentioned:

"To run HelloData
1. Create..., see Referencing the ADO Libraries."
0
 

Author Comment

by:AustinKalb
ID: 7007263
i have vb6 on another system.. but i'm trying to get all this to work on the .net system.

Its not just adCmdText.. there are lots of references. I can paste in the code if that would be helpful - although the .net adds a bunch of new stuff.

I found an ADO introduction on the MSDN site. It starts with the suggestion that one review the HelloData program.
0
 
LVL 22

Expert Comment

by:rspahitz
ID: 7007311
Actually, the part I'm confused about is why adCmdText even comes up as invalid unless the reference doesn't exist.  This is part of VB6, so if the reference is msado15.dll you should have it included.  If it's not part of ADO.Net, then it shouldn't even be in the example.

Can you verify the ADO reference and number.

0
 

Author Comment

by:AustinKalb
ID: 7007326
it appears as if the example was written for vb6, not .net. All the same the enum's are unresolved.

I'm not sure what you want re "Can you verify the ADO reference and number"
0
 
LVL 22

Accepted Solution

by:
rspahitz earned 100 total points
ID: 7007331
>Can you verify...

Locate the place in .net where it tells you information about added components libraries, and see what it says.

In VB6 it was menu Project|References.  When you go there in VB6, you get a list of registered dlls, type libraries (tlbs), ocxs, etc. with descriptive names and a checkbox.  The checked items are included in the project.  When you click on one, it tells you the actual file name in a frame at the bottom.

If ADO.net's dll (or whatever) is not included, it's not part of your project and you would get the types of issues you're mentioning.
0
 

Author Comment

by:AustinKalb
ID: 7016529
I'm not going to try and answer this question.. dot net is differnet that vb6 - i'm using c++ instead. thanks for your help.
0

Featured Post

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

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

Introduction I needed to skip over some file processing within a For...Next loop in some old production code and wished that VB (classic) had a statement that would drop down to the end of the current iteration, bypassing the statements that were c…
There are many ways to remove duplicate entries in an SQL or Access database. Most make you temporarily insert an ID field, make a temp table and copy data back and forth, and/or are slow. Here is an easy way in VB6 using ADO to remove duplicate row…
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 Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…

815 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now