Solved

Ado Big Problem

Posted on 2004-10-14
3
283 Views
Last Modified: 2013-12-03
Hello experts....

I have a problem.

The project is in C++ (#import "msado15.dll... etc)

Everything works rather well...
The connection to an Access database works fine.

I create a recordset by calling the Execute method of the connection object.
The command is valid ("select col1, colb from anytable where condition")
After that, I start to scan the recordset by
char *str = (char*)pRecordset->Fields->GetItem("Col1")->Value;
pRecordset->MoveNext ();

The problem is that in some minor cases, I get garbage in the variable str.

I tested reading twice the value and check if the method fails in some minor cases.
That was not the problem, no mather how many times i call.
str = (char*)pRecordset->Fields->GetItem("Col1")->Value;
I suspect that the DB Engine is returning that garbage. (in this case Access)

If some one can help me about this.... I will apretiate it.





0
Comment
Question by:Marsc
3 Comments
 
LVL 6

Accepted Solution

by:
WxW earned 250 total points
ID: 12312116
AS far as I can remember, ADOFields :: get_Item creates the VARIANT itself, and it does not return a char* .

I used this code, it may help:

         for(int i = 0 ; i < RecordCount ; i++)
               {
            ADOField* aF = 0;
            VARIANT vt;
            vt.vt= VT_I4;
            vt.intVal = i;

               aFS->get_Item(vt,&aF);
            if (!aF)
                  continue;

               wchar_t* Name = 0;
            aF->get_Name(&Name);

               VARIANT Value = {0};
            aF->get_Value(&Value);

         // Now use these 'Name' and 'Value'

}....
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

Suggested Solutions

With most software applications trying to cater to multiple user needs nowadays, the focus is to make them as configurable as possible. For e.g., when creating Silverlight applications which will connect to WCF services, the service end point usuall…
After several hours of googling I could not gather any information on this topic. There are several ways of controlling the USB port connected to any storage device. The best example of that is by changing the registry value of "HKEY_LOCAL_MACHINE\S…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

808 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