topic Re: How to force a refresh of a single map service layer? in ArcGIS API for Silverlight Questions

How to force a refresh of a single map service layer?

RickThiel — Tue, 09 Aug 2011 11:42:51 GMT

Hello,

I am somewhat new to the ArcGIS Silverlight API and I need some help getting over a hurdle. I basically need to know the syntax for getting a handle to a single map service layer in my map and then forcing it to refresh itself. I have been looking at the api for a day and I have not found anything that is working for me.

Thank you so much. --Rick

Re: How to force a refresh of a single map service layer?

DorothyMortenson — Tue, 09 Aug 2011 13:29:52 GMT

I'm no expert either, but I'll add what I know that might help you move on to the next step.

I'm not sure you can actually stop and start services in the API, particularly a specific layer within the API. I think it's an ArcGIS Server thing.

I have a set of data that gets updated every morning. Because they are part of a map service, I cannot just replace the data, as it will say it's locked or being used. So I have to stop and start the service, but it's the entire service. I do this in a batch job that runs on a schedule. The commands are:

C:\gisdata\tools\BatchServiceTool\arcgisservice <name of server> Framework/OWRD_Large_Dams MapServer stop
C:\gisdata\tools\BatchServiceTool\arcgisservice <name of server> Framework/OWRD_Large_Dams MapServer start

From your API, I would think you could go run this job, as you would a python script or some other script. But I don't know if you would run into problems since the service is open in your application.

Good luck.
Dorothy

Re: How to force a refresh of a single map service layer?

RickThiel — Tue, 09 Aug 2011 14:54:17 GMT

Thanks Dorothy, I appreciate that you took the time to reply to me.

However, I think that I might have caused confusion with my post... I do not need to stop and start a service. I just need my map viewer to go to the web-service and grab a fresh set of data when an event happens (ie. a button click).

Does anyone else have any ideas?

Thanks, --Rick

Re: How to force a refresh of a single map service layer?

IgressT — Tue, 09 Aug 2011 20:39:28 GMT

Thanks Dorothy, I appreciate that you took the time to reply to me.

However, I think that I might have caused confusion with my post... I do not need to stop and start a service. I just need my map viewer to go to the web-service and grab a fresh set of data when an event happens (ie. a button click).

Does anyone else have any ideas?

Thanks, --Rick

Each layer has a Refresh().... I guess that's not working for you

Re: How to force a refresh of a single map service layer?

RickThiel — Tue, 09 Aug 2011 21:05:57 GMT

Thanks doc21. I guess that is my question. I do not know how to get a handle to each layer programmatically and then call the refresh for each layer. Do you have some example code? thanks, --Rick

Re: How to force a refresh of a single map service layer?

TerryGiles — Tue, 09 Aug 2011 21:12:16 GMT

Rick,

What kind of layer is it? If it's a ArcGISDynamicMapServiceLayer also try setting the DisableClientCaching property to true, then call refresh. Worked for me to refresh an event layer after the user updates lat-longs in a SQL Server table as described here - http://forums.arcgis.com/threads/31439-Refreshing-map-or-layer-display