Export to excel code in WCF service

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How export data to excel in WCF Service. Want to generate excel file more than 10,000 in single call. This operation should be fast.

What I have tried:

Hi,
I created one way WCF service. In which I processed all data at service side.
Also I was exporting data to excel using local report (rdlc used for formatting and exporting) but for no. of times (i.e more than 10000) I'm exporting data to excel, which takes a lot of time to generate using rdlc and also rdlc have memory leak problem.

So is there any solution ? Please help.

Thanks.

Posted 27-Oct-18 0:45am

sudhir.mali

Updated 27-Oct-18 4:44am

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F-ES Sitecore 27-Oct-18 7:09am

If you google how to create Excel files via c# you'll find loads of articles and libraries, so try them all. Maybe start with using the Excel ODBC driver which lets you read\write to Excel sheets like they were tables in a database.

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#realJSOP · Answer 1 · 2018-10-27T04:45:00

This is the first way I would do it:

0) Send a request to the server to generate the file.

1) As mention by F-ES Sitecore[^], have the server generate the Excel file using the Excel ODBC driver, and save the file using a GUID for the name, such as EE430293-3460-4251-AD14-84E4E99B6E8E.xlsx (un-guessable and always unique).

2) Contact the client when the file is ready (providing the filename in the message)

3) The client can then transfer the file using some secure means, such as SFTP.

4) After a certain amount of time (24 hours?), the server can automatically delete the file in the interest of self-maintenance.

This way, your the server does all the work creating the file, and simply allows the client to know the filename, at which point, an actual transfer can be requested (by the client).

Another option instead of using an actual Excel file is to have the database return the result set as XML, with is an Excel-compatible format as well. That way, there's no need for ODBC at all (and it might even be faster).