I'm having a very hard time accomplishing my main goal: extracting data from an xlsx excel file
I'm running ExtJS + node.js, and I see two options:
Use this XLSX.js framework to convert the base64 string into js object-representations of xlsx worksheets for me to use. Problem is, I have no idea how to get a base64 string from an xlsx file..
Upload the xlsx file to the server, do the conversions there using node-xlsx, the send the object-representations back ala json. Having lots of difficulties here since ExtJS doesn't use real AJAX for file uploads so I don't know how to send the results back..
Has anyone had experience with this or could advise a solution? Having lots of trouble..
Number two is going to be the better option IMO. You can take a look at the FileUploadField control - there is a good example on submitting the Form that will upload the file to the server: http://docs.sencha.com/extjs/4.2.1/#!/api/Ext.form.field.File
From there you can parse and return the json.
Since we struggled with exactly the same issue, we created a front-end XLS(X) and CSV import and export tool that you can use in ExtJS 4 applications with a few lines of code. The user just drags the file on the grid and done. We just launched it, here is a description of the problematic in dealing with files and the solution: http://2gears.com/2014/08/ext-js-excel-import-export-easy/
Hope it helps.
Related
I'm trying to access to my iCloud Notes with a python script using pyiCloud framework, but when I try to list the notes it seems that Documents folder is empty. Does anyone know how I should make that?
>>> api.files['com~apple~Notes']['Documents'].dir() It returns:
>>> []
It sounds like you have an authentication problem that you can't get access to your Notes from the file storage (the UbiquityService). This issue might give you some more clues.
On the other note (!), I found the following a better way to get my Notes exported. I have tried a couple of ways mentioned around the web. Although there is no in-app solution to export Notes in a format other than PDF files, I have stumbled upon the following two solutions:
Export in Markdown (or in other formats in the paid version) via the Bear app. I found this way easier and of more quality in terms of keeping the formatting, attachments, etc:
Download the Bear migration Workflow script from here and follow the instructions.
[optional] At this point, you have the HTML files with inline encoded images. Use my script to decode images to get regular HTML files with the images in an accompanying directory.
Install Bear and import the exported files from Notes.
Export the files as Markdown, HTML, or whatever format you desire from File -> Export Notes within the Bear app. Don't forget to check the "Export attachments" box in the export dialog.
Export in HTML (and then convert to Markdown if you want) via the Notes Exporter app. The app gives you HTML files with inline encoded Base64 images saved with .txt extension (?!). Although I personally like this way as it generates output files that mimic closely the original Notes, the hyperlinks are missing in the exported files (it still keeps the hyperlink coloring though):
Download Notes Exporter from here.
Export Notes to the path you choose.
[optional] Rename file extensions to .html.
Voilà, now you have your Notes as HTML files with the same formatting and images.
Decode inline Base64 images and save HTML files with images saved in a separate adjacent directory using the script that I wrote for this:
https://gist.github.com/SHi-ON/945ea2272ea4bb29e13bd0305370da90
Hope this helps to give you an idea!
I'm currently working on a project (developed using laravel, php, javascript, jquery, html), containing a large amount of data, so I'm using DataTables to display them with serverside set to true. What I'm trying to figure out is how to export the complete table to an excel file - right now it only saves one page (the one being shown at that very moment ) - using the Button extention.
I've been reading about it for a while now but still can't figure out a way to do this. I understand that, since serverside is set to true,
the only rows that exist on the client-side are those shown in the table at any one time.
But how can I get the complete table? Any help would be appreciated!
UPDATE:
So I create the excel file with the data I want in the backend, using PHPExcel, but now the problem is that it is saved server-side, while I wanna make it downloadable (client-side). From what I've been reading, I must add the appropriate headers to do so, but nothing I've tried works. Using
this, I managed to output the data of the excel in the screen, but it just shows gibberish... I should probably also mention that I'm new at this!
Stuck in this weird situation at work. I have .doc files I'm parsing with Node.JS. They have photos in them that are .emf I want to display in my web app. I have no issue getting the emf file out of the word doc, but I can't figure out how to display it on a webpage. Simply embedding as is didn't work. I tried to find a utility to convert them automatically but with no luck. I thought of converting them myself but can't find any tecnhical info on the .emf file.
Any suggestions?
EMF (WMF) are the SVG like formats of the 1990's.
I can't give you the full solution in this space but checkout this thread that uses Apache Batik
If you don't want to build it yourself perhaps try the paid version of converters
If you can't afford I would recommend to host the Batik and make a service endpoint and make calls to generate the desired format from EMF. It may turn out actually faster.
I am working in building a project management tool,using MEAN(Mongodb,Expressjs,Angularjs,Nodejs) Stack.
I have a requirement in my project, where users will upload any kind of excel or csv format file and i need to parse each row from the file(excel|csv) and map it to my database model and save it has a mongodb document.I am trying to find an excel and csv parser library to accomplish my task.I also came accross xlsx, it looks good but it doesnt support reading csv files.It will be really helpful if any one could suggest a node.js library that can read all kinds of excel and csv file formats efficiently.Thanks in advance
At one point, I used Node CSV https://github.com/wdavidw/node-csv
to get the data inputted, it's really easy to use. Most of my users were fine with just having the CSV format option.....but you could combine the functionality of each library depending on the file type entered.....
solution with sample using c#,
scenario:
Download encoded pdf file of base64Encode and decode(base64Decode) and store in ApplicationData.Current.LocalFolder;
you can use File.ReadAllBytes to load the PDF file into your program and then u can convert the loaded pdf file using Convert.ToBase64String(bytes) method
You might want to prefer this link
https://social.msdn.microsoft.com/forums/vstudio/en-US/e5965e02-0bbb-4f8d-9e5f-8611aa902457/how-to-convert-pdf-file-to-base64binary
Well, I am not going to write a solution with a complete sample for you, but I will point you to what may be the most exhaustive base42 discussion in Windows Runtime.
http://blog.jerrynixon.com/2014/11/reading-and-writing-base64-in-windows.html
It's a crazy coincidence that I just wrote this a few weeks ago. You'll notice that it is in the context of an image, but you should be able to translate it simple enough.
Remember to post your solution here!
Best of luck!