Refresh featureLayers automatically on extent change

Question

Hello,

I'm currently experiencing some trouble with my zoom functions.  Whenever I zoom or enter a search on my application, the extent changes to the proper location, but the map just remains blurry and nothing can be seen.  I have tried all the solutions from this" rel="nofollow" target="_blank">http://forums.arcgis.com/threads/48229-Is-there-a-way-to-refresh-the-graphics-on-the-map?highlight=refresh]this thread but none of them worked.  I attached a featureLayer.refresh() to my centerAndZoom but that did not work either.  I have also added the below code to my proxy according to the last post on this" rel="nofollow" target="_blank">http://forums.arcgis.com/threads/54774-Disable-Caching-on-FeatureLayer.refresh%28%29?highlight=refresh]this threadresponse.setHeader("Cache-Control","no-cache");
response.setHeader("Pragma","no-cache");
response.setDateHeader ("Expires", 0);But that did not work either.  So I am just not really sure how to go about fixing this.  It appears that there have been a few people who have managed to solve this issue but I have not been able to solve it with their solutions.  Any assistance anyone can give me would be greatly appreciated.

Thanks!
Ryan

DianaBenedict · Answer

What kind of layers do you have loaded in your map? 
- ArcGISDynamicMapServiceLayer
- ArcGISTiledMapServiceLayer
- FeatureLayer

What Spatial Reference are you setting?

Are you using an ESRI basemap?

If you are using FeatureLayer what mode are you  using?
If you are using OnDemand then what is your scale dependency?
Note that OnDemand will attempt to retrieve ALL of the graphics/features in your map display till it hits the magic 1K features .. some browsers will sit and spin for a while until it has retrieved all the graphics. This can also be very server and client intensive if you do not have a scale threshold set on your feature layers.

If you are using cached tiles then do the spatial reference match the map spatial reference
if you have more than 1 cached tile then do the LODS match?

These are just some questions that come to mind in order to evaluate your issues.

RyanWhiley · Answer

Diana,

I just went through and made sure everything in my header is fixed but I am still getting the same errors in the console.  I'm not very proficient in JS, but I still feel like it has something to do with loading the graphics when I zoom.  Because whenever I pan the tiles load all right, I only have an issue when I zoom.  So I'm not really sure if this is a common problem or not, but if you have any idea of ways I could look further into that I'd be really grateful.

Thank you!
Ryan

DianaBenedict · Answer

Ryan At one point I also got some weird behavior when I did not have the correct header information in my HTML here is an example of my header information. Make sure that the meta tags look right and also check out the script tags and ensure that it all looks correct as well. [HTML] Add your Title here! ..all the HTML body stuff goes down below [/HTML]