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C# ODBC connection to an excel spreadsheet

Posted on 2013-06-30
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Hello,
I am using an ODBC connection to link to an excel spreadsheet in C#. the Excel driver in version 12 (xls, xlsx, xlsm, xlsb).  If I use an SQL statement such as:  

"Select * from [transaction_master$] " 

then I can successfully iterate through the spreadsheet rows. However when I try to use a statement such as:


Select * from [transaction_master$] WHERE  T2_CompanyID = " +  MyCompanyNo "   

Where T2_CompanyID is a column heading on the spreadsheet, then I get the following error:

ERROR [22018] [Microsoft][ODBC Excel Driver] Data type mismatch in criteria expression.

The connection string is set to:

DSN=RulesdbExcel;Data Source=C:\\C# Folder\\RulesdbExcel.xls; HDR=yes; IMEX=1; Format=xls;

Any idea what is causing this and how I might get around it ?

regards
Pat
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Question by:pclarke7
3 Comments
 
LVL 35

Assisted Solution

by:[ fanpages ]
[ fanpages ] earned 750 total points
ID: 39288576
Hi Pat,

Given that you are using a value of 1 (ImportMixedType) for the IMEX ("intermixed") option, does the column [T2_CompanyID] contain alphanumeric or numeric data?

If alphanumeric you will need to include the search criteria in your SQL statement in (double) quote characters; ASCII Character 34 (").

In Visual Basic for Applications, for instance, this may be achieved as follows;
Chr$(34) & MyCompanyNo & Chr$(34)

BFN,

fp.
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LVL 13

Accepted Solution

by:
jonnidip earned 750 total points
ID: 39289004
Anyway, I would strongly suggest you to use Excel DataReader.


Regards.
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Author Closing Comment

by:pclarke7
ID: 39290869
Hi Guys,
thanks for your input. I will definitely check out Excel DataReader.

However thanks to your comments I found the problem. The Spreadsheet had one of the rows used in the SQL as alpha when it should have been numeric. Once I changed this it worked.

regards
Pat
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