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How to convert office file to image

I am searching from last two days but did not find any thing.
My requirement is to create a document viewer in my web application (C#.Net) and I don't want to use any third party tool for this. Can I convert the files in image or PDF or in any common formate which can be easly render on web page. I also can not use Introp object.
Any help will be highly appreciated

You mention in one of your comments that you'd like to write all the code yourself but don't know where to start. Here's how I would go about it...
First, you'll need to familiarize yourself with the Microsoft Office Format specification. You can find that here (there's a link to the technical specification). Office documents are actually a .zip file with an XML file inside along with any binary data representing attachments. Just renamed a .docx file as .zip and you'll be able to open it up and see the XML and any other supporting documents inside (same is true for xlsx, etc...).
Then you'll need to become intimately familiar with either PDF or HTML, as your job now will be to convert the various Office document structure into PDF or HTML structure, being sure to respect page layout, margins, order, etc...
As others have said, this is a large task which is why third party tools exist today. Also, each third party toolset has it's limitation as this is really hard to "get right" in all situations and there will be edge cases that work for one document and not another (because maybe they didn't use Microsoft Word to save the .docx, maybe they used OpenOffice and OpenOffice interpreted the standard slightly differently...)

If you cannot use COM/Interop technologies in your solution, you can take a look at the specialized 3rd party options. I see that you prefer not to use them, however, there are no existing built-in solutions in the .NET Framework. Check out my answer in a similar thread that describes how to accomplish exactly the same task using 3rd party libraries (for example, DevExpress, since I have experience with it). In addition, take a look at the Documents demo, where you can see how to create images/thumbnails from different types of MS Office documents.

I believe what you need is an intermediate representation of the documents which can be converted into an image for the viewer to display.
Lets me try to explain with the below diagram:

You can use tools like smallpdf or OfficeToPDF to do that. Just integrate them into your application.
Small PDF(https://smallpdf.com/library-detail)
officetopdf (https://officetopdf.codeplex.com/)

create ppt programmatically using C# [duplicate]

Is there a way to programmatically create PowerPoint presentations? If possible, I'd like to use C# and create PowerPoint 2003 presentations.

Yes, you can.
You will want to look into MSDN which has a pretty good introduction to it.
I might give you a word of warning, Microsoft Office interop is compatible with an API which is now more than 10 years old. Because of this, it is downright nasty to use sometimes. If you have the money to invest in a good book or two, I think it would be money well spent.
Here's a starting point for you. Use the search feature on MSDN MSDN Webpage. It's good for any Microsoft C# .NET style stuff.
Specifically in regards to your question, this link should help: Automate PowerPoint from C#. EDIT LINK NOW DEAD :(. These two links are fairly close to the original KB article:
Automate Powerpoint from C# 1/2
Automate Powerpoint from C# 2/2
Finally, to whoever downvoted this: We were all learning one day, how to do something as a beginner is most definitely programming related, regardless of how new someone might be.

OpenXML looks like the way to go from a web app.
Using the interop libraries is not recommended, as others have stated.

You can also look at Aspose Slides, a component for .NET and Java that makes it easy to generate powerpoint documents.

If you don't really need PowerPoint compatible output, consider using a markup language such as LaTeX with the Beamer package to produce a PDF of the presentation, or use HTML and javascript in a manner similar to Slidy. If you need fancy effects, it might still be easier to use SVG, and you'd have the benefit of getting output that can be reliably viewed with free software.

http://msdn.microsoft.com/hi-in/magazine/cc163471(en-us).aspx
Use this link. Although this is in VB.NET, C# supports the same.

You may also try out SlideMight, a tool for merging hierarchical data with PowerPoint templates.
SlideMight supports:
text substitution in text fields, tables and notes
image substitution, from raw data, files and URLs
images in tables nested
iterations over data to create slides
iterations to populate tables, possibly spanning multiple slides
special formatting for specific cell values
hyperlinks to generated slides
Input data format is at this time just JSON.
There are versions for Windows and Mac OS X.
More information is at http://www.SlideMight.com
Disclaimer:
I am the owner of Delftware Technology, the company that developed SlideMight.
And I am one of the developers.

You can use Essential Presentation product from Syncfusion Software Private Limited. This product can be used to
Create and manipulate PowerPoint presentations
Open, modify, and save existing PowerPoint presentations
Convert PowerPoint presentations to PDF or Image
More information is at https://help.syncfusion.com/file-formats/presentation/overview
Disclaimer:
I work for Syncfusion Software Private Limited

Open PDF and print to PDF programmatically C#

I am developing an application that is able to open and display PDFs after I open them and print them to another PDF using CutePDF, but the originals are not viewable.
I am looking for a way to programmatically open a PDF file, and print to another PDF file (not necessarily using CutePDF, just printing to another PDF is the desired functionality).
This will be integrated into a C# .NET project. Are there any suggestions how to go about doing this?
Thanks.

You could use Office Interop and generate the PDF, when you say "print to another pdf", I imagine you mean just generate? Or are you saying spool them to a pdf print driver that essentially will just create a PDF to be saved.

Use iText, which is available in Java and C# versions. I have used the Java version successfully. I recommend the iText in Action book to help you get up to speed with iText faster. The book discusses only the Java API, but I imagine you will be able to learn the principles of iText from the book and then figure out the minor differences for the C# version.

To implement this you can use PDFFlow library for generating PDF files from C#. It has easy fluent syntax and many features.
Here are many examples of real complex PDF documents: examples
Good luck :)

Import and Export Excel - What is the best library? [closed]

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In one of our ASP.NET applications in C#, we take a certain data collection (SubSonic collection) and export it to Excel. We also want to import Excel files in a specific format. I'm looking for a library I can use for this purpose.
Requirements:
Excel 2007 files (Does Excel 2003 support over 64k rows? I need more than that.)
Does not require Excel on the server
Takes a typed collection and, if it can, tries to put numeric fields as numeric in Excel.
Works well with large files (100k to 10M) - fast enough.
Doesn't crash when exporting GUIDs!
Does not cost a crapload of money (no enterprise library like aspose). Free is always great, but can be a commercial library.
What library do you recommend? Have you used it for large quantities of data? Are there other solutions?
Right now, I am using a simple tool that generates HTML that is loaded by Excel later on, but I am losing some capabilities, plus Excel complains when we load it. I don't need to generate charts or anything like that, just export raw data.
I am thinking of flat CSV files, but Excel is a customer requirement. I can work with CSV directly, if I had a tool to convert to and from Excel. Given Excel 2007 is an xml-based (and zipped) file format, I am guessing this kind of library should be easy to find. However, what matters most to me are your comments and opinions.
EDIT: Ironically, in my opinion and following the answer with the most votes, the best Excel import&export library is no export at all. This is not the case for all scenarios, but it is for mine. XLS files support only 64k rows. XLSX supports up to 1M. The free libraries that I've tried feature bad performance (one second to load one row when you have 200k rows). I haven't tried the paid ones, as I feel they are overpriced for the value they deliver when all you need is a fast XLSX<->CSV conversion routine.

I'm going to throw my hand in for flat csv files, if only because you've got the greatest control over the code. Just make sure that you read in the rows and process them one at a time (reading the document to the end and splitting will eat up all of your memory - same with writing, stream it out).
Yes, the user will have to save-as CSV in excel before you can process it, but perhaps this limitation can be overcome by training and providing clear instructions on the page?
Finally, when you export to the customer, if you set the mime type to text/csv, Excel is usually mapped to that type so it appears to the user to be 'an Excel file'.

I discovered the Open XML SDK since my original answer. It provides strongly typed classes for spreadsheet objects, among other things, and seems to be fairly easy to work with.
I am going to use it for reports in one of my projects. Alas, version 2.0 is not supposed to get released until late 2009 or 2010.

the last version of ExcelPackage that is free under LGPL for commercial projects is, https://www.nuget.org/packages/EPPlus/4.5.3.3
If you need latest and greatest, Commercial license is available here: https://epplussoftware.com/en/LicenseOverview/
I'm still fighting with the export to excel function since my application should export some data to excel-template 2007
this project seems fine to me, and the developer is very responsive to bugs and issues.

I've been using ClosedXML and it works great!
ClosedXML makes it easier for developers to create Excel 2007/2010
files. It provides a nice object oriented way to manipulate the files
(similar to VBA) without dealing with the hassles of XML Documents. It
can be used by any .NET language like C# and Visual Basic (VB).

SpreadsheetGear for .NET reads and writes CSV / XLS / XLSX and does more.
You can see live ASP.NET samples with C# and VB source code here and download a free trial here.
Of course I think SpreadsheetGear is the best library to import / export Excel workbooks in ASP.NET - but I am biased. You can see what some of our customers say on the right hand side of this page.
Disclaimer: I own SpreadsheetGear LLC

NPOI For Excel 2003
Open Source
http://www.leniel.net/2009/07/creating-excel-spreadsheets-xls-xlsx-c.html

I've used Flexcel in the past and it was great. But this was more for programmatically creating and updating excel worksheets.

CSV export is simple, easy to implement, and fast. There is one potential issue worth noting, though.
Excel (up to 2007) does not preserve leading zeros in CSV files. This will garble ZIP codes, product ids, and other textual data containing numeric values.
There is one trick that will make Excel import the values correctly (using delimiters and prefix values with the = sign, if I remember correctly, e.g. ..,="02052",...).
If you have users who will do post-processing tasks with the CSV, they need to be aware that they need to change the format to XLS and not save the file back to CSV. If they do, leading zeros will be lost for good.

For years, I have used JExcel for this, an excellent open-source Java project. It was also .NET-able by using J# to compile it, and I have also had great success with it in this incarnation. However, recently I needed to migrate the code to native .NET to support a 64-bit IIS application in which I create Excel output. The 32-bit J# version would not load.
The code for CSharpJExcel is LGPL and is available currently at this page, while we prepare to deploy it on the JExcel SourceForge site. It will compile with VS2005 or VS2008. The examples in the original JExcel documentation will pretty well move over intact to the .NET version.
Hope it is helpful to someone out here.

I've worked with excel jetcell for a long time and can really recommend it.
http://www.devtriogroup.com/exceljetcell
Commercial product
Excel files XLS & XLSX
Based on own engine in pure net.

The following site demonstrates how to export a DataTable, DataSet or List<> into a "proper" Excel 2007 .xlsx file (rather than exporting a .csv file, and getting Excel to open it).
It uses the OpenXML libraries, so you don't need to have Excel installed on your server.
Mikes Knowledge Base - ExportToExcel
All of the source code is given, free of charge, aswell as a demo application.
It's very easy to add to your own applications, you just need to call one function, passing in an Excel filename, and your data source:
DataSet ds = CreateSampleData();
string excelFilename = "C:\\Sample.xlsx";
CreateExcelFile.CreateExcelDocument(ds, excelFilename);
Hope this helps.

Check the ExcelPackage project, it uses the Office Open XML file format of Excel 2007, it's lightweight and open source...

I've tried CSharpJExcel and wouldn't recommend it, at least not until there is some documentation available. Contrary to the developers comments it is not a straight native port.

I know this is quite late, but I feel compelled to answer xPorter (writing) and xlReader (reading) from xPortTools.Net. We tested quite a few libraries and nothing came close in the way of performance (I'm talking about writing millions of rows in seconds here). Can't say enough good things about these products!

You can use Microsoft.Jet.OLEDB.4.0

We have just identified a similar need. And I think it's important to consider the user experience.
We nearly got sidetracked along the same:
Prepare/work in spreadsheet file
Save file
Import file
Work with data in system
... workflow
Add-in Express allows you to create a button within Excel without all that tedious mucking about with VSTO. Then the workflow becomes:
Prepare/work in spreadsheet file
Import file (using button inside Excel)
Work with data in system
Have the code behind the button use the "native" Excel API (via Add-in Express) and push direct into the recipient system. You can't get much more transparent for the developer or the user. Worth considering.

There's a pretty good article and library on CodeProject by Yogesh Jagota:
Excel XML Import-Export Library
I've used it to export data from SQL queries and other data sources to Excel - works just fine for me.
Cheers

You could try the following library, it is easy enough and it is just a light wrapper over Microsoft's Open XML SDK (you can even reuse formatting, styles and even entire worksheets from secondary Excel file) :
http://officehelper.codeplex.com

Spreadsheetgear is the best commercial library we have found and are using. Our company does a lot of advanced excel import and export and Spreadsheetgear supports lots of advanced excel features far beyond anything you can do with simple CSV, and it's fast. It isn't free or very cheap though but worth it because the support is excellent. The developers will actually respond to you if you run into an issue.

How about the apache POI java library. I havent used it for Excel , but did use it for Word 2007.

Generating a PDF document based on a Microsoft Word Template [closed]

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I need to take a Word document that is a template of sorts...collect user input to populate specific fields in that template..then generate a PDF file that includes the completed template as well as a few other document types. Does anyone have a good suggestion on a component to achieve this? Preferably one that does not require Microsoft Office to be installed on the web server.

Try Aspose Words for .net. From their website: "Aspose.Words enables .NET and Java applications to read, modify and write Word® documents without utilizing Microsoft Word." Utilizing Aspose Words with Aspose PDF permits you to output to PDF.
One thing you do NOT want to do is install MS Word on your production server. Loading those objects is SLOW and EATS memory. You won't be able to use the CutePDF Writer unless you also install MS Word on the server. Yeck.

Is there a reason to use Word? If you start with a PDF with Form fields, you can either allow the user to fill out the fields, or do it programatically with iTextSharp's PDF stamper.
If you need to use MSOffice 2000/2003 components programmatically, you can try Office Web Components. They do need to be installed on the server, but can be used by .NET and Com apps to interact with office file types. More info here...http://en.wikipedia.org/wiki/Office_Web_Components
If you dig about on an office CD you should find the OWC installer for your version. I haven't worked with 2007, but I assume there is something similar available.
iTextSharp and OWC are no-cost, check the licensing for more details.

Hmmm...You might be able to employ CutePDF printer in a creative way to solve this problem. Essentially, it takes anything that can be fed through a standard print driver and makes a PDF out of it. It's free.

Try using The Apache POI API to populate the fields. It can get into Word documents and access their elements.
As for the Word -> PDF step, I'd also recommend evaluating the Aspose solution. It may even be able to perform both steps. Its not free, however.

My first thought for a "doc template" + merge to pdf solution would be to start with open office formats. - the odt file (open document template) is xml-based - so you could even use perl, to do the merge, then call writer's doc 2 pdf (I have no idea if they have an API, but one could find out in less than a day - even if one had to examine the source.)
and converting your "word" dot to a writer odt file is just a "file save as" operation in OoWriter.

If you use Aspose.Words, then your input document/template can be in one of the several supported formats including DOC, DOCX.
Then you can insert data into the document in a number of ways. You can use bookmarks in a document and just set their text. Or better yet use the reporting engine we provide. It allows to use standard MS Word MERGEFIELD fields plus adds capabilities for repeating regions and even nested. E.g. you can design an invoice (with parent/child data) template in MS Word and then populate from a .NET DataSet in one line of code.
Also, you only need Aspose.Words to produce PDF (a year ago you needed both Aspose.Words and Aspose.Pdf). You can also easily save the exactly the same looking document to DOC, DOC, DOCX and a few other formats.
I'm on the Aspose.Words dev team.

Have a look at the Muhimbi PDF Converter Web Services. It runs on Windows as a service, but can be accessed from any non-Windows web services capable environment including Java and .NET.
Although this solutions requires MS-Office to be installed on a server (not necessarily the same server as your application), it is very robust and provides perfect conversion fidelity.
To generate or Modify MS-Word files I recommend using the free Open XML SDK for Microsoft Office. Eric White maintains a really good Blog about it.
Disclaimer, I worked on this product. Having said that, it works great.