C#•3y ago

❔ SignalR for real-time REST api data in WPF?

Hey,

Im working on a hobby WPF application that needs to consume a rest api for real-time updates on game camera positions. Since the camera position data is always updating I want my wpf app to reflect those updates in realtime....would signalR be a good solution or is api polling good enough?

Or anyone has any other recommendations for a straightforward way to ensure the client recieves near real-time updates from the rest api?

Thanks!

Pobiega•9/14/23, 10:51 AM

SignalR would be a lot nicer than polling

PPobiega SignalR would be a lot nicer than polling

JuicyOP•9/14/23, 11:00 AM

oh hey pobiega! hope you doing good :D

about that btw, does signalR work with any rest api?

JuicyOP•9/14/23, 11:00 AM

endpoint looks like this:

https://127.0.0.1:2999/replay/render

JuicyOP•9/14/23, 11:00 AM

works to do a get request but I dont think its a websocket, if thats needed

JJuicy oh hey pobiega! hope you doing good :D about that btw, does signalR work with ...

Pobiega•9/14/23, 11:02 AM

Uh no, you need SignalR on the server AND client sides. Its a "wrapper" around websockets.

JuicyOP•9/14/23, 11:02 AM

Ahh.. damn

JuicyOP•9/14/23, 11:02 AM

I dont think it would work then

JuicyOP•9/14/23, 11:02 AM

Whats my next best option?

Pobiega•9/14/23, 11:02 AM

in SigR, the server pushes data to the client

JuicyOP•9/14/23, 11:02 AM

ah I see

Pobiega•9/14/23, 11:02 AM

if you cant modify the server, then its polling only

JuicyOP•9/14/23, 11:02 AM

Alright

JuicyOP•9/14/23, 11:03 AM

appreciate the help thanks

PPobiega if you cant modify the server, then its polling only

JuicyOP•9/14/23, 11:07 AM

btw, I suppose multiple threads is the way to go here? if I have muliple endpoints to get data from

Pobiega•9/14/23, 11:07 AM

that seems overkill

JuicyOP•9/14/23, 11:07 AM

hmm

Pobiega•9/14/23, 11:07 AM

just use async task

JuicyOP•9/14/23, 11:07 AM

even if its like every 50 miliseconds update?

Pobiega•9/14/23, 11:08 AM

yes

JuicyOP•9/14/23, 11:08 AM

ok im gonna give a go

Pobiega•9/14/23, 11:08 AM

periodictimer with proper use of async await and it should be fine

PPobiega periodictimer with proper use of async await and it should be fine

JuicyOP•9/14/23, 11:12 AM

ok that makes me think about one thing though, why await something that I know will always update/run in the background?

Pobiega•9/14/23, 11:12 AM

wdym

PPobiega wdym

JuicyOP•9/14/23, 11:13 AM

if I want real time data

Pobiega•9/14/23, 11:13 AM

I sense a grave misunderstanding of how async/await and tasks work here

JuicyOP•9/14/23, 11:14 AM

yea probably

JuicyOP•9/14/23, 11:14 AM

i was just thinking if i wanted something that updates continiously

JuicyOP•9/14/23, 11:14 AM

that i had to run it in the background or something

Pobiega•9/14/23, 11:14 AM

not really, but you could do that

Pobiega•9/14/23, 11:15 AM

this is for updating a WPF app, right?

PPobiega this is for updating a WPF app, right?

JuicyOP•9/14/23, 11:15 AM

yep

Pobiega•9/14/23, 11:15 AM

I'd probably build this with some reactive elements

Pobiega•9/14/23, 11:15 AM

so your WPF app subscribes to updates from the observable

Pobiega•9/14/23, 11:16 AM

and the "background task" polls the APIs and pushes data to the observable when available

JuicyOP•9/14/23, 11:17 AM

wouldnt i get threading issues

JuicyOP•9/14/23, 11:17 AM

like cross thread exception or what its called

JuicyOP•9/14/23, 11:17 AM

if i use tasks

Pobiega•9/14/23, 11:17 AM

thats exactly what we are trying to avoid by using IObservable

JuicyOP•9/14/23, 11:18 AM

ahhh

JuicyOP•9/14/23, 11:18 AM

okay okay

JuicyOP•9/14/23, 11:19 AM

ill try with it

Pobiega•9/14/23, 11:32 AM

https://www.youtube.com/watch?v=6yjl_h7-WYA is a pretty good video on how to think about reactive

JuicyOP•9/14/23, 11:36 AM

awesome thanks

Accord•9/15/23, 12:07 PM

Was this issue resolved? If so, run

/close

/close

otherwise I will mark this as stale and this post will be archived until there is new activity.