Generate Reports in Excel without Office installed in server.

Question

Hi,
  I have generated the reports in excel using Msoffice but cannot generate in my server due to security issues,so..
   i want to generate excel Charts without using excel.interop  library.
I googled then i found all these are open source but each have its pros and cons ,NPOI ,Open Xml SDK 2.0,EPPLUS,Excellibary.
 
   our project has about 20+ reports to generate,with different chart types.

can u please suggest me the best open source to generate reports in excel with better performance.
Urgent....
Thanks.
KK

Answer 1

There is a perfect way while using flag to detect whether someone is already logged in or not and in case if System get power off , you need an event handler called as SystemEvents.SessionEnds.

 

Use this to change the flag value from true to false

 

Use this link as a reference

https://stackoverflow.com/questions/6799955/how-to-detect-windows-shutdown-or-logoff 

Answer 2

Hey Ajeesh

 

one more question... ??

 

If power off happen then how you suppose to Reset the flag

 

Answer 3

You can take a look at this article which discuss a similar topic. 

 

https://blog.learningtree.com/preventing-duplicate-logins-in-asp-net/

 

Another option would be to have a flag in your table and set the value to true when an user login and when user log off set the value to false.  Also for when a second user tries to login we will first check if login flag has been set to true for any other user. If its true then show message to user and display the login page, if not allow the user to login.