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Resolved POWERSERVER EXCEL

  1. How-to
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  1. Shirley Sanjuan
    Shirley Sanjuan
  2. PowerServer
  3. Wednesday, 4 October 2023 20:39 PM UTC

Hi, How can I read a file of Excel from Powerserver? 

  1. PowerServer
How to debug a PowerServer project
PowerServer 2022 R2 Build 2819 Cloud App Launcher ...
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mike S
mike S Accepted Answer Pending Moderation
  1. Thursday, 5 October 2023 20:19 PM UTC
  2. PowerServer
  3. # Permalink
nonsense. it works great in powerserver. been doing this stuff for years in powerserver including the old PS2020, but even better with new versions
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Chris Pollach @Appeon
Chris Pollach @Appeon Accepted Answer Pending Moderation
  1. Wednesday, 4 October 2023 20:52 PM UTC
  2. PowerServer
  3. # 1

HI Shirley;

  You would have two choices ...

  1. Since PS is Database only oriented, you would have to store the XLSX file in a DB Blob column and then perform a SelectBlob command in the PS Application.
  2. You could build your own Web API  using SnapDevelop (VS, etc) IDE where you have full scripting capabilities in C#. Then read the XLSX in C# code directly from an external file. Then return that to a PB App (or whatever calling App) as either a BLOB or Base64 data stream.

Regards ... Chris

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Shirley Sanjuan
  1. Shirley Sanjuan
  2. Wednesday, 4 October 2023 20:56 PM UTC
Hi Chris, Thanks, Do you have example of how to do that?
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Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Wednesday, 4 October 2023 20:59 PM UTC
Do you mean as a Blob or via a C# coded Web API?
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Shirley Sanjuan
  1. Shirley Sanjuan
  2. Wednesday, 4 October 2023 21:34 PM UTC
any one.
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mike S
mike S Accepted Answer Pending Moderation
  1. Wednesday, 4 October 2023 21:32 PM UTC
  2. PowerServer
  3. # 2

just open the file directly from the users machine:

1. have your users save excel as tab or csv file then import that into datawindow/store

2. use ole to read (or write) excel: ConnectToNewObject("excel.application") You can use ole to open the file then save it as csv/tab delimited.  or you can read it cell by cell.

3. use a 3rd party dll or .net to read it directly into something like tab/csv format

4. use excel 'database' driver and open it using adodb via ole: ConnectToNewObject ( "ADODB.Connection" )  

 

---------------

if it's a lot of heavy processing that takes a very long time, then it probably makes sense to do the work on a server so you would upload the file then run a process (pb or .net or something) and return the results to the user.

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Chris Pollach @Appeon
  1. Chris Pollach @Appeon
  2. Wednesday, 4 October 2023 23:12 PM UTC
Hi Mike;

I think that Shirley's question is a bit ambiguous ... does she mean:

1) Process XLSX files in the "Middle Tier" and return them to the call App?

2) Process the XLSX files in the client App?

My answer was based on assumption #1 (like we could do in EAServer). ;-)

Regards .. Chris
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Armeen Mazda @Appeon
  1. Armeen Mazda @Appeon
  2. Thursday, 5 October 2023 01:43 AM UTC
Adding to what Mike said, client-side for PowerServer 2022 is same as traditional PB so if it works in PB it will work is PS. There must be some config issue if not working.
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mike S
  1. mike S
  2. Thursday, 5 October 2023 04:03 AM UTC
Mostly the same - the one thing you can't do is directly load excel into a datawindow/store using a transaction object with odbc excel driver to connect to it.
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