Error while getting route (using the router.project-osrm.org/route/v1 json file and the Web component)

[rohitcr2k]

Hello Steve,

Thank you for the response.

@SteveJG

You said you ‘put it under ScreenInitialize event’; I imagine by it you meant the call route Procedure. I can only guess because you are not sharing your code. If you call it in the screeninitialize, you call route before you have both an origin and a destination value; you have to have both.

Oh silly me!

I made such a blunder there.

That was definitely a big error itself.

@SteveJG

most likely repeats since you call the route Procedure within a timer. Do not do that. I would call the route calculation from a Button, once. Absolutely do not call route within the LocationChanged event.

The errors are not there!

It works now with a button. It was not a smart move to get route without using a button. Putting it under clock was a poor move, as you said.

@SteveJG

You adapted a tutorial for your purposes but did not realize the tutorial does things you should not do in YOUR app. You are also adapting a different tutorial (Algerian Pharmacy tutorial) that uses straight line distances to determine which, of a number of locations is the closest to you. You can do that but will have to significantly modify the code. Run the route Procedure to extract only the distance from several possible destination locations and place the distance to the locations. Do not plot the track each time you do that, you only need the track from the shortest distance location probably. Calculating the distances to several venues will probably post several tracks on the map if you use your existing code. You probably do not want to do that so will have to adapt the code to do what you want.

I will do as you have said.

Regards.