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what is the best way to export content in excel [closed]

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I have a report data which comes from back end service (.NET) and report format in HTML table.(angular)
I need to export this report to excel with Angular front end.
what would be the best way to achieve this? I found couple of ways which would be the better one or suggest if you find any other way
1. export the html table with xlsx package available on npm.
2. send http request which will get all the data from back end service including html.
Please also let me know what would the ideal solution for handling export to excel functionality. Is there any documentation Microsoft provides?

I use EPPlus on the back end in ASP.NET to generate Excel files. Open source, works great, far easier to deal with than manually creating the XLSX packages, and it supports a number advanced Excel features.

Is there a way to extract multipart zip files without 3rd party tools? [closed]

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I took a look at the ZipFile class but it does only support single files. So my question is: Is there any way to extract multipart zip files without relying on 3rd party tools?

Simple answer is not unless you write one yourself, the .Net compression system is geared towards streams not files, and as a stream can be a file, memory space, network traffic or a data feed from a device, enforcing file compression onto them would be a very bad thing
I tend to use SharpZip, its a free opensource library that handles some of the most common compression formats
Update:
looks like if you'rr using .net4.5 or higher ms has added the ZipArchive which allows you access directly to the windows zip manager (thanks to spender)

Validate Excel Data in C# [closed]

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I would like to validate Excel data according to the following before importing into a database:
Some columns have a maximum length
Some columns are numbers/dates
There must be no special characters
How can i go about this? (I am using C#)
EDIT: How do I validate an Excel column to have a maximum text length using Interop, for example, if I do not want the text to be more than 30 characters long? #JMK #artm #Linger #ivan_pozdeev #BenR

Use the Microsoft OpenXML SDK for Office to open the file and examine its contents. Library is available here http://msdn.microsoft.com/en-us/library/office/bb448854(v=office.15).aspx

Open XML SDK will be a great start
try this guide from MSDN - http://msdn.microsoft.com/EN-US/library/office/gg575571(v=office.15).aspx
NOTE - Open XML SDK is free to use and distribute. Go through documentation and first try to understand how Spreadsheets are structured. Also Open XMl SDK support ONLY open XMl file foramts, that means .XLSX as default for exel and NOT .XLS

Implementing a application HTML help system [closed]

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We want to implement a application help and documentation system. It should be based on HTML, because there are a lot of existing files and it gives us the most flexibility. Currently we use CHM files. We want to enable internal people (not developers) to edit the contents.
We thought of a stand-alone application that supports TOC, indexing (tags), search, etc. We also thought of using a local web server.
Until now our application uses pure C#, it would be good to keep this.
We are totally clean of web/asp knowledge, so the question is:
Where is a good place to start?

You can use documentation apps like SandCastle
Which use your XML documentation in your code to generate a help file.

Finally we ended up implementing a local HTTP server:
Internal people creates HTML content within our internal network
Our own build-tool creates the TOC and a search index and packs all content to a zipped file
The zipped file is packed into the application installation
When the end-user call help from within our application, the local http server is started
The HTTP server uses the HttpListener class
With this, it is possible to have some HTTP queries for special tasks like starting tools of our application by clicking a link without interception of the browser

Trying to make a very outdated Baan system more accessible for the users with C# and Excel via interop [closed]

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Upon suggestion this question has been amended to the following;
Does anyone here know about Baan as a system and if so how compatible (if at all) is it with Excel from a developer's point of view? I need to pull reports from Baan to populate Excel workbooks and be able to take certain portions of data into other workbooks without bringing in the whole code and sifting through it.

This is really 3 independent questions:
How do I parse a BaaN report in C#? (You may have some trouble with this, unfortunately.)
How do I read an Excel file in C#?
How do I generate an Excel file in C#?

if you are looking the pull data from data source into excel that is just tabulate format. so what you need to learn is excel inter-op with C# and that is very simple i can provide you some of samples. as like.
http://vscontrols.blogspot.com/2010/09/manipulating-excel-using-adonet.html
and if you are looking to pull complex data and matrix values from the Data Source then i suggest you to read about the EXCEL DNA its an open source having power to play around the Excel widely.