I have an app that saves your data and retrieves your data under a ID number of your choice! The only thing is I have people asking for an excel document of all there saved data! Does anyone know how I would go ahead with this! I am using Swift and Xcode 6.1! I am also using a SQLite file that core data has made for me.
Thanks,
AppSwiftGB
Creating native Excel is likely a PITA. You should export to CSV, though the format seems to be another PITA for one is liking comma, the other semicolon and the third tabs :-(
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I have a huge dataset value in JRDatasource object and am not able to export it to Excel as it will give me memory out of space error. So am planning to split the JRDatasource object and export the data part by part. Any idea or suggestion on how to implement this? Or any other way suggested also fine for me. Thanks in advance.
I dont know much about JRDataSource, but I'll offer another solution.
Take a look at Apache POI library which enables you to create excel files on-the-fly.
So you can read from the data source element by element and persist them on a excel file.
About 3 years ago, I was looking for a way to allow a web app user to download table results to an Excel file. I knew that I didn't want to put Office on the web server and that I probably wanted to create the XLS file in XML format. The question was: what was the best way?
Now I am writing my resume and I am trying to recap the things that I did and I am concerned that I didn't take the best approach and I am wondering if somebody can tell me whether my suspicions are true.
Basically, I saved an Excel file as XML and then looked at the contents of the saved file and reverse engineered what I thought was a pretty cool SDK to create an Excel file in XML format. It was fairly robust with options , nice object model, etc.
But did such a library already exist? One that I could have used? I want to know if I will need to defend this "accomplishment"
Also, could anyone recommend me a good place where I can see actual resumes of people with .NET / SQL Server or general developer skills?
You can try SmartXLS (for Java or .Net), it supports most features of Excel (cell formatting, Charts, formulas, pivot tables etc), and can read/write both the Excel97-2003 xls format and the Excel2007 openxml format.
These people wrote a perfectly good one that you probably couldn't implement yourself for as cheaply.
I have this issue with Core Data. I am creating a core-data-based application, for one of the tabs, to populate a UITableViewController. Basically, I have read somewhere that there is an issue with providing a pre-populated sqllite file to be used to load up the data. I created a pre-populated data file and at first had issues with Z_METADATA and other anomalies like that. If we are creating our own sqllite file, is there somethign we have to include, such as certain table names etc?
Note, I didnt create teh application with use core data for storage ticked at beginning, so im not sure if that makes a difference.
Doron, take a look and A Blog On Tech for a really great example of how to get what you are trying to do. Basically it's best to let Xcode create the base SQLite DB for you, copy it to your code directory, pre-populate your data there and then finally add it to the project through Xcode.
So while it is possible to work a Core Data application that you haven't created from the beginning in Xcode it is much easier to start from there.
I need to manuplate an excel sheet workbook (add sheets/ add data/ hide columns / protect cells with password / change fields contents/ etc etc)
should I use the COM objects provided by microsoft (but then i think they have few problems being used in asp.NET)
or is there a good (commurcial or free) library / plug in to be used for doing this kind of activity.
please help
try spread Sheet Gear third party component
http://www.spreadsheetgear.com/
The easiest way I've found is to use the Excel XML format. That way you can edit an Excel sheet like any other XML file. To see how Excel hides columns or protects them with a password, do those things manually and see how Excel saves them as XML. This is a breeze to code up, it's rock stable, and it's fast.
Manipulating native Excel files is harder: you can use the COM objects with the primary interop assemblies. In my experience this is very hard to get right. In the best case, Excel leaves old copies of itself around, which you can mitigate with a scheduled nightly server reset. In the worst case, Excel will randomly hang, making your web site unresponsive.
Another way to work with native Excel files is Visual Studio Tools for Office. It's certainly easier to use than COM interop, and works best from Visual Basic:
Application.Workbooks.Open("Workbook.xls")
C# lacks optional parameters, and opening a workbook becomes something of a bad joke:
Application.Workbooks.Open(#"Workbook.xls",
missing, missing, missing, missing, missing, missing, missing,
missing, missing, missing, missing, missing,missing, missing);
I didn't dive very far into VSTO because XML manipulation worked so well for me. Maybe other people can comment on how it works out in an ASP.NET website.
With SpreadsheetGear you have complete access to the Excel doc and all of the macro capability including the ability to protect and un-protect cells, columns, etc. We have the same thing you are describing except in WinForms.
We have used the COM objects and I cannot recommend it. On big problem is that the objects never get released...
We now use the component from Gembox software. Have used it for two years and works OK, it's a little cheaper that the one metioned above, which I didn't know before seeing it here.
I have been given a set of COBOL DAT, IDX and KEY files and I need to read the data in them and export it into Access, XLS, CSV, etc. I do not know the version, vendor of the COBOL code as I only have the windows executable that created the files.
I have tried Easysoft and Parkway ODBC drivers but I have not been successful in reading the data from the files.
I do not have access to the source code as the company that was distributing this product shut down.
I have successfully read some of the dat files using http://www.cobolproducts.com/datafile just now which I came to know through another forum. Most probably I will work with them to help me read the rest of the files that I am having an issue with.
A few possibilities.
1/ See if you can find the names of the people that worked for the company. They may be helpful.
2/ Open the DAT file in a text editor. The data may be decodable from that. If the basic format can be discerned, quick'n'dirty code can be written to extract it.
3/ Open up the executable in an editor, there may be strings in there that indicate which compiler was used, then you can search for info on its file formats. If it's a DOS application, there's a good chance it was either Microsoft or Fujitsu COBOL.
4/ Consider placing job requests on work sites like elance or rentacoder; I don't think there's a cost if the work can't be done successfully.
5/ Hire someone to examine it and advise on the likelihood of recovery.
6/ Get a screen dump of the record contents for every active record and re-construct it from that.
Some of these are pretty hard so your mileage may vary.
Good luck.
I have read COBOL DAT files only with FD, when I do not have the FD, I open the file in a Text Editor, and try to guess the columns, and try again, until I have this working, the big problem with this approach is when the DAT file have COMP columns, that can be any kind of COMP type, but with a litthe patience I cold get this done.
I had tryed Parkway ODBC, but without success.
for anyone going through this journey, I found this in sourceforge: Cobol and RPG data reader and converter
http://sourceforge.net/projects/cobol2j/
Im about to try it, sounds kind of promising