I'm building a simple delphi program to transfer data from dbf file into sql server. The dbf file it self contain a memo field which data is saved on .fpt file. When i try to open it with ADOQuery, when I tried to scroll down to the next row, I got an error message
Multi-step operation generated errors. check each status value
this is my connection string and query syntax
Provider=VFPOLEDB.1;Data Source=D:\LEARNING CENTER\DATSPP;Mode=Share Deny None;Extended Properties="";User ID="";Password="";Mask Password=False;Cache Authentication=False;Encrypt Password=False;Collating Sequence=MACHINE;DSN=""
select * from dpb.dbf
even when i'm not running the program and try to scroll the dbgrid, i also get this error.
can someone possibly tell me where i'm doing wrong?
"Multi-Step" errors are not a problem with one cause but a generalised report of some deeper problem arising from a huge number of possible causes. The sources of these problems will vary hugely by database type and provider involved.
In this situation I would break the problem down into separately testable steps.
First, simplify the query. Modify it so that it returns only a single, specific column into your grid (not the memo). If that works then keep adding columns to your query and grid, one by one, until the problem occurs. Then focus on what it might be about the column that triggers the issue.
(It may not occur at all; the issue might be due to the use of select * in the first place)
If you cannot return even a single column into your grid, then take the grid itself out of the equation. Simply return a value into a field and scroll through the results one record at a time in that field.
If that works then you can focus on how the grid behaviour might be involved.
The problem may be caused by the way the grid and the data source are attempting to navigate through the result set. If you've eliminated other possible explanations then you might investigate retrieving your entire query result into a TClientDataSet (or other in-memory dataset).
If you can do that then you can attach your grid to that in-memory dataset.
Unfortunately none of the above are guaranteed to be an answer to your specific problem, but hopefully may set you on the track to finding that answer.