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ADODB Connection to Excel fails to read data for second (read-only) user

Posted on 2014-01-09
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Last Modified: 2014-01-13
I have an Excel workbook with a user defined function to retrieve data from closed workbooks using ADODB. The function works for the first user that opens the main workbook, however when a second user opens the file, accepting the message that the workbook can only be opened Read-only, the retrieve function fails. The connection object is established correctly but the SQL to retrieve the recordset fails.

Windows 7
Main workbook native Excel 2010
Source workbook - 97-2003

Connection string as follows:
Provider=Microsoft.ACE.OLEDB.12.0;
User ID=Admin;
Data Source=U:\Clients\********\Dec 2013\ReadOnlyCrashInvestigation8Jan2014\***.xls;
Mode=Share Deny None;
Jet OLEDB:System database="";
Jet OLEDB:Registry Path="";
Jet OLEDB:Database Password="";
Jet OLEDB:Engine Type=35;
Jet OLEDB:Database Locking Mode=0;
Jet OLEDB:Global Partial Bulk Ops=2;
Jet OLEDB:Global Bulk Transactions=1;
Jet OLEDB:New Database Password="";
Jet OLEDB:Create System Database=False;
Jet OLEDB:Encrypt Database=False;
Jet OLEDB:Don't Copy Locale on Compact=False;
Jet OLEDB:Compact Without Replica Repair=False;
Jet OLEDB:SFP=False;
Jet OLEDB:Support Complex Data=False;
Jet OLEDB:Bypass UserInfo Validation=False;

SQL is simple "Select * FROM [SHEETNAME$Range]"

Any pointers would be greatly appreciated.

Attaching file will require a lot of anonymising.
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Question by:ExcessAxel
3 Comments
 
LVL 40
ID: 39769656
ADODB need to open the file to retrieve the data, and by default, ADODB needs to keep the connection as long as the recordset is alive, meaning that the file stays opened.

Just as happens when a user opens the file in Excel, is then shows up as ReadOnly for anybody who tries to open again it a second time.

If the Recordset is use only to get the data with no interaction with it afterward, get rid of it as soon as you have the data.

Otherwise, lookup "disconnected recordsets" on the web to know how to work with a recordset without keeping the connection opened.
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LVL 16

Accepted Solution

by:
Jerry Paladino earned 500 total points
ID: 39770638
Change:    Mode=Share Deny None  to   Mode=Read
Make sure you are closing the connection before the macro terminates...

Assuming your Connection variable is called "Cn"...  after you have retrieved the data use...

Cn.Close
Set Cn = Nothing


I don't think you are specifically opening a Recordset but if you are make sure you close it properly as well.

Assuming your RecordSet variable is called "rs"...  after you have retrieved the data use...

rs.Close
Set rs = Nothing
0
 

Author Closing Comment

by:ExcessAxel
ID: 39777058
Many thanks to ProdOps - worked a treat.
In a previous version, it didn't seem to matter that the Mode was set to Share Deny None but in the current Workbook, setting it to "Read" did the trick. We had been tidying up the connection and recordset objects.
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