how to call a dll file's method use $zf function ?

Question

Question

water huang · Nov 24, 2020

i have looked for $zf function，it says $zf(-6) will work,but it doesn't work out actually,anybody can give me a dll file which will work with $zf,if you should show me the way making the dll that is best!thanks!

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Robert Cemper · Nov 24, 2020

did you check $zf(-3,... $zf(-4,...., ........

https://docs.intersystems.com/irislatest/csp/docbook/DocBook.UI.Page.cls?KEY=BGCL_dynamic
and
https://cedocs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=RCOS_fzf-4
also
https://cedocs.intersystems.com/latest/csp/docbook/Doc.View.cls?KEY=BGCL_library

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Robert Cemper · Nov 24, 2020

If you can grab a Caché distribution you will find in
%cachedir%\dev\cpp\ several samples and required sources

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score 0 · Answer 1 · 2020-11-24T11:21:00-05:00

$zf functions (3-6 to be precise) cannot call arbitrary libraries but only InterSystems IRIS callout libraries.

You need to write a C library which is an InterSystems IRIS callout library and which calls the dll you need. Here's documentation on that. And here's a sample callout library.

Another approach would be using the CNA community project to call your library. CNA provides an interface for using native C-compatible shared libraries.

score 0 · Answer 2 · 2020-11-24T22:35:09-05:00

water huang · Nov 24, 2020

it seems very complex，so far，i would like to use webservice

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score 1 · Answer 3 · 2020-11-24T12:00:13-05:00

Eduard Lebedyuk · Nov 24, 2020

Here's a good callin/callout example repo.

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score 0 · Answer 4 · 2020-11-24T14:07:18-05:00

You can also use the .NET Gateway to call a .NET DLL. This imports your .NET DLL into Cache and the functions are exposed as Cache Objects.

Look at %Net.Remote.ObjectGateway

score 0 · Answer 5 · 2020-11-24T20:36:45-05:00

water huang · Nov 24, 2020

thank you,i know this way，but it is not a good choice

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