We have one existing ODS file (Open office spreadsheet) comprise of multiple sheets. I am intending to read the data from each sheet on want to update some cells on each sheet using c#
I have googled a lot but not able to find any perfect solutions. I went through open office website also but got no success.
Can any one please name some free api or sample code
Alternate approach
Open the file with Open Office, save it as an XLS or XLSX file and then use one of the Excel editing libraries out there.
Open Office should be capable of reading/writing the XLS or XLSX files.
I had no issues editing these formats with EPPlus so far, but there are also other libraries.
If anyone else is reading now, you can manipulate ODS files as XMLs as seen here. There are NuGet packages available for easier manipulation as well, but this is the bare-bones approach
Related
I am searching a C# way to delete (empty) Excel-rows in a worksheet without using the Microsoft.Office.Interop.Excel namespace.
Found many examples with the Interop namespace like C# and excel deleting rows . But is there a way to do it without third-party-tools - only with the .NET?
Thank you for your help!
The options for working with Excel files relying only on standard .NET Framework namespaces is limited. Two possibilities come to mind. The first is "simplest", but only applicable if your main interest is in working with the content as a database. The second allows you to do pretty much "anything" with the Excel workbook, but the learning curve will be steep.
Both of these approaches are suited for working in a server environment (unlike those that require presence of the Excel application) and do not require any licenses.
You can use an OLE DB connection (ACE OLE DB provider) to communicate with the contents of an Excel workbook. It allows connecting to individual worksheets as well as named ranges. Basic SQL functionality is supported.
The file format of Excel 2007 and later versions is Office Open XML (OOXML). These files are "zip packages" containing the files (xml for the most part) that make up a workbook. So any standard tools that can work with Zip packages and XML can be used to open up an Excel workbook, edit the content, then close the workbook back up. In the .NET Framework, these would be the System.IO.Packaging (in WindowsBase.dll, usually needs to be referenced specifically) and System.XML namespaces.
The documentation for the file formats is the ECMA-376 standard (http://www.ecma-international.org/publications/standards/Ecma-376.htm). A useful on-line resource is openxmldeveloper.org.
Note that Microsoft also provides the Open XML SDK, a free download which can be distributed license-free with your solution. The Open XML SDK reduces the "learning curve" as it reduces the amount of knowledge you need about the OOXML file formats. I mention this for the sake of completeness, because I know how challenging trying to work directly with the file format is. Also, since the DLL is freely distributable and can be copied as part of your solution it might meet your requirements.
This stackoverflow post may help - it discusses some libraries that can manipulate excel without needing Office installed.
The question regards VB.NET but I believe the options discussed would work with C# too...
How to process excel file in vb.net without office installed
From a console application written in C#, how can I :
extract an Office Open XML file,
Obtain the data part of it modify
the data and re-zip it again
My motivation is to save an excel file with the formats and use it to populate cells via a console application.
Is this possible to achieve, do I need a specific library to that provides Excel files manipulation (unzipping it, modifying it etc.)
For the zip-unzip part i think you can find easily many examples here.
To edit the excel file, I'd suggest you to have a look at Open XML SDK. With it, you can easily edit office files programmatically.
Hope it helps
I have to merge two excel files containing one sheet in each of them and I have to generate a third file containing two sheets corresponding to the two original sheets.
This task can be done using "interop" and the code works but when the same code is run in a system that does not contain MS Office, the process fails and an error comes up.
Can you please guide me as to what dll files to be included or how this merging could be done without using interop?
Thanks in advance.
From what I've experienced, there is unfortunately no framework way of doing this (without writing your own excel file reader). I happened across this interesting library which does just that.
http://exceldatareader.codeplex.com/
So far it has worked for our needs and requires no interop.
You should use an external component to work with excel files. I use the syncfusion xslIo.
If you only have raw data (no formulas, etc) you could also just save the files using the XML Spreadsheet 2003 (*.xml) format (its very easy to read) and process the data using standard XML tools.
How Can I open and read all data in excel file to perform some operations on say write them to a database ...
You can automate Excel using com automation http://support.microsoft.com/kb/302096 , but if you are on a web server you will need to use a third party library like http://sourceforge.net/projects/koogra/
You can use the default library that comes with the .NET framework in order to use the Excel.Application Object and therefore the Workbook and Worksheets objects, so you can access Excel files, read or manipulate them
You can add it to your project by using the Add Reference option, the library is called
Microsoft.Office.Interop.Excel
Hope this helps
Assuming that the Excel files are in a table format, I'd suggest that the best way would be using OleDB. This page has a very basic sample that should show you how to get started.
If you're unable to use OleDB for some reason, then you could use Excel Automation. This is not recommended if it's on a server though and will in general be slower and less stable than OleDB, but you will be able to do pretty much anything you need.
There are several ways:
If *.xslx (the new XML based format) is used, you can open that file and read the XML File
You can read it with Excel COM Interop (not recomended on a Server!)
You can use a ODBC Data Source
Starting with Office 2007, you can use OpenXML to query/manipulate office documents. The .xlsx files (all Office .???x files) are zipped up XML files.
ExcelToEnumerable is a great solution if you want to map Excel data to a list of classes, e.g:
var filePath = "/Path/To/ExcelFile.xlsx";
IEnumerable<MyClass> myClasses = filePath.ExcelToEnumerable<MyClass>();
Disclaimer. I am the author of ExcelToEnumerable.
In C# ASP.NET 3.5 web application, I need to export multiple datatables (or a dataset) to an Excel 2007 file with multiple sheets, and then provide the user with 'Open/Save' dialog box, WITHOUT saving the Excel file on the web server.
I have used Excel Interop before. I have been reading that it's not efficient and is not the best approach to achieve this and there are more ways to do it, 2 of them being: 1) Converting data in datatables to an XML string that Excel understands 2) Using OPEN XML SDK 2.0.
It looks like OPEN XML SDK 2.0 is better, please let me know. Are there any other ways to do it? I don't want to use any third-party tools.
If I use OPEN XML SDK, it creates an excel file, right? I don't want to save it on the (Windows 2003) server hard drive (I don't want to use Server.MapPath, these Excel files are dynamically created, and they are not required on the server, once client gets them). I directly want to prompt the user to open/save it. I know how to do it when the 'XML string' approach is used.
Please help.
Thank you.
Is Excel 2007 support absolutely required?
We have used NPOI with great success, and it supports all the features we want (multiple worksheets, formatting, formulas). It is also pretty stable.
The files it produces are in Excel 2003 format though, so they are binary, not OOXML.
This question has been asked before, see here for a better discussion.
You can easily stream the xml response to the user as an XML Excel file.
Any Page:
Open excel Report
Report.aspx:
Response.Clear();
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("Content-Disposition"
, "attachment;filename=" & _fileName & ".xml");
Response.Write("<?xml version=""1.0""?>");
Response.Write(excelXML);
I too had come across similar requirement to export dataset into excel. I used this open source library. It's based on Open XML standards and doesn't use Office Interop. It met my requirement. But, my requirement was basic. So, check if it fulfills your requirement.