topic Re: Upgrading to API version 3.0 in ArcGIS API for Silverlight Questions

Upgrading to API version 3.0

NateReck — Tue, 28 Aug 2012 18:06:11 GMT

I am preparing to upgrade a Silverlight web app based on the 2.4 API to the 3.0 API and also from AGS 10.0 to 10.1. I am just trying to see what "gotchas" exist that people have run into and how they were handled. Or what were the major hurdles to jump when converting a 2.4 app to 3.0. Thanks!

Re: Upgrading to API version 3.0

DenisT — Wed, 12 Sep 2012 04:42:57 GMT

There is an issue with 3.0 API.
If you interact with a map, a dynamic layer can send multiple requests.
For example a dynamic layer sends request A, then you change the map scale and the layer sends request B.
The problem is that the request A is not cancelled when the map sends the request B.
So there could be a situation when a request B completes first, because it's a different scale and the map could be much more simple in that scale.
In that case the map renders the request B result image.
But then the request A completes and the map clears request B image and renders the request A image (for the old scale).
In that case the user should pan the map to see the correct image.

The bug was introduced in 3.0, so we downgraded to 2.4 for now.
We are using Silverlight 5 with ArcGIS Server 10, not 10.1.

Re: Upgrading to API version 3.0

AlexanderKhoroshun — Wed, 10 Oct 2012 16:07:54 GMT

I'm having the same issue with SL API v.3.0:
ArcGIS Server 9.3

Thanks in advance for any advice from Esri team.

Re: Upgrading to API version 3.0

dotMorten_esri — Thu, 11 Oct 2012 20:45:15 GMT

This issue has been fixed and will be in v3.1. It's a bit of a race condition and not too often this occurs, so I'm not sure if that should keep you from updating (there are lots and lots of other things that got fixed, improved or increased performance so it's probably worth it).

Re: Upgrading to API version 3.0

JenniferNery — Thu, 11 Oct 2012 21:37:04 GMT

I think as a workaround you can set DisableClientCaching=True. I've seen this happen when setting VisibleLayers property twice where most recent value was overwritten by first value.

Re: Upgrading to API version 3.0

AlexanderKhoroshun — Thu, 11 Oct 2012 22:03:14 GMT

Morten, Jennifer,

Many thanks for your responses. Looking forward to see v3.1... and, hopefully, ArcGIS Runtime v.1.0 for WinRT 🙂

Alexander.

Re: Upgrading to API version 3.0

DenisT — Mon, 15 Oct 2012 15:33:57 GMT

It's a bit of a race condition and not too often this occurs, so I'm not sure if that should keep you from updating

Well, then I am lucky, because I can see this annoying bug very often.

Morten, Jennifer, thanks for your advices.
Looking forward to 3.1.

Re: Upgrading to API version 3.0

deleted-user-ATjHIWsdQYmT — Thu, 01 Nov 2012 14:21:31 GMT

Any *general* timeframe for a 3.1 release?