OleDB Jet - Float issues in reading excel data

Posted by Patrick on Stack Overflow See other posts from Stack Overflow or by Patrick
Published on 2010-04-11T10:34:16Z Indexed on 2010/04/11 10:43 UTC
Read the original article Hit count: 253

Filed under:

excel

|

oledb

|

float

|

jet

When I read a sheet into a DataTable using the OleDbDataReader, floating point numbers loose their precision.

I tried forcing OleDb to read the excel data as string, but although the data is now contained in a DataRow with each Column defined as System.String it looses precision (18.125 -> 18.124962832).

Any idea how to avoid this behaviour?

© Stack Overflow or respective owner

Related posts about excel

Excel error "This workbook contains Excel 4.0 macros or Excel 5.0 modules"

as seen on Super User - Search for 'Super User'
I have a workbook that was protected via the Protect Workbook feature. It was sent to someone else to modify. When they sent it back, it was unprotected and when I try to reprotect it I get this error, "This workbook contains Excel 4.0 macros or Excel 5.0 modules. If you would like to… >>> More
Open excel 2007 excel files and save as 97-2003 formats in VBA

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a weird situation where I have a set of excel files, all having the extension .xls., in a directory where I can open all of them just fine in Excel 2007. The odd thing is that I cannot open them in Excel 2003, on the same machine, without opening the file first in 2007 and going and saving… >>> More
Creating Excel or Excel compatible Spreadsheets on the server side in C#

as seen on Stack Overflow - Search for 'Stack Overflow'
I'd like to make server-side excel compatible spreadsheets that maybe use OpenXML or a structured data format. I've used Office Interop before to generate Excel spreadsheets, but those apps run on a PC that has office installed. For this web project I'm building, the server doesn't have office installed… >>> More
vba access values from excel workbook from another excel workbook

as seen on Stack Overflow - Search for 'Stack Overflow'
Any ideas why this code will not work? Workbooks.Open Filename:="C:\a.xls" Workbooks("a.xls").Activate Worksheets("b").Select Dim OutputArray(10, 10) OutputArray(1, 1) = Workbooks("c.xls").Worksheets("worksheet_otherthan_default").Select.Range(A1).Value I'm trying to run a macro in one file (unnamed… >>> More
Excel workbook event order and usage when closing Excel

as seen on Stack Overflow - Search for 'Stack Overflow'
Given the following workbook events: BeforeClose BeforeSave Please tell me: - The firing order in the case of multiple workbooks alreay opened (wb1, wb2 and wb3 are opened in this order) and the user closes Excel. You can assume all 3 needs saving. - What happen if user cancels one of the saving… >>> More

Related posts about oledb

Running OLEDB VB6 Windows Progam Under Wine

as seen on Super User - Search for 'Super User'
I'm trying to install a VB6 Windows program that uses OLEDB to access VFP tables to run under Wine 1.0.1 on Ubuntu 9.10. Wine is configured to Windows version Windows XP. The program install ran okay, and I used winetricks to install MDAC 2.8 and JET 4.0 sp7. I also installed Microsoft's vfpoledb… >>> More
Using OLEDB parameters in .NET when connecting to an AS400/DB2

as seen on Stack Overflow - Search for 'Stack Overflow'
I have been pulling my hair out trying to figure out what I can't get parameters to work in my query. I have the code written in VB.NET trying to do a query to an AS/400. I have IBM Access for Windows installed and I am able to get queries to work, just not with parameters. Any time I include a parameter… >>> More
How to determine MS Access field size via OleDb

as seen on Stack Overflow - Search for 'Stack Overflow'
The existing application is in C#. During startup the application calls a virtual method to make changes to the database (for example a new revision may need to calculate a new field or something). An open OleDb connection is passed into the method. I need to change a field width. The ALTER TABLE… >>> More
OleDb database to DataSet and back in c#?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm writing a program that lets a user: Connect to an (arbitrary) View all of the tables in that database in separate DataGridViews Edit them in the program, generate random data, and see the results Choose to commit those changes or revert So I discovered the DataSet class, which looks like it's… >>> More
Exception:Cannot Start your application.The Workgroup information file is missing or opened exclusiv

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
We were getting this error when trying to connect to a password protected access file. This is what the connection string looked likestring conString =@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source="Path to your access file";User Id=;Password=password";To fix the issue this is what… >>> More