Latest Contributions by DanielWalton

‎09-13-2012

After thinking about this some more, it occurs to me why this is happening. When the user zooms in far enough, GraphicsLayer clips the geometry so that the symbol does not exceed 16k pixels. Since my symbol uses ImageBrush, the image will essentially stop zooming once this happens because the symbol container is no longer growing. There must be a way to setup the symbol so that the image gets positioned (and clipped?) appropriately. This is Silverlight after all! Thanks, Dan

‎09-11-2012

I think I've found a bug in the implementation of this workaround. When you zoom way into an elementlayer or graphicslayer, the UIelement seems to shift position and stop scaling. You can observe this on the interactive sample for elementlayer by zooming way in on one corner of the red rectangle. This also happens with graphicslayer and this fillsymbol template: <ControlTemplate xmlns="http://schemas.microsoft.com/client/2007" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Path x:Name="Element" Fill="{Binding Symbol.Fill}"/> </ControlTemplate>

‎09-11-2012

Morten, can you share a snippet of that clipping-on-the-fly solution? Thanks! Edit: nevermind, see below.

‎09-11-2012

We need to display large rasters on the map with lots of fine detail that needs to be viewed up close. We have tried using ElementLayer and GraphicsLayer (with an imagebrush fillsymbol). Both approaches work fine at high scale, but both exhibit the same bug, that whenever you zoom in far enough, the translation and scale of the UIElement shifts suddenly. This behavior can be observed even on the interactive sample for ElementLayer. If you zoom in on one corner of the red rectangle far enough (in Africa), eventually it will move into the wrong position. Surely this has been identified before; I just wonder if there are any workarounds available or fixes planned? Update: found the existing thread, sorry to duplicate post!

‎06-07-2012

Unfortunately neither of those quite accomplish what I need. OnDemandCacheSize=0 simply limits the number of graphicslayer-cached graphics that are off-screen. DisableClientCaching=true just prevents the browser from caching http responses. Despite setting both of those I still see the query request having a '&WHERE=OBJECTID NOT IN (...)' parameter. I need to prevent the excludeCachedFeaturesFromQuery() routine from executing within the FeatureLayer.Update() method. It seems that currently this is impossible with OnDemand as the query mode. Can this be a feature in a future release perhaps?

‎06-07-2012

I want the extent-driven query that OnDemand mode gives you, but without the caching. Is there a way to have both?

‎06-07-2012

Thanks for the reply Jennifer. I'm not sure I follow what you mean. How do I detect a change on the server? Also, I am calling Update() every 30 seconds, but the query includes a WHERE clause that excludes the OBJECTID's of graphics currently in the client. So no changes to those graphics are detected. I was wondering if there is a way to disable this functionality.

‎06-06-2012

We have a feature layer with QueryMode set to OnDemand and DisableClientCaching set to true. I also call .Update() on the layer from a DispatcherTimer every 30 seconds. When multiple users edit at the same time from different browsers, A few oddities occur: 1. When user 1 edits a feature, the edits don't appear in the other users' sessions unless they re-initialize the featurelayer. I have looked into the API and see that this is by design, to prevent the geometries from loading over and over again. But is there a way to disable this feature? 2. Often times when user 1 deletes a feature, the feature will reappear and need to be deleted 1 or 2 more times before finally being deleted for good. I cannot figure out why. Any thoughts or ideas? Thanks!

‎05-03-2012

OnDemand makes no since for a layer that isn't in a map. I'm guessing that the null reference occurs when the layer looks for the Map extent to determine the envelope parameter to pass on to the server. If you need to manage the collection size in a disconnected layer, use the Where parameter.

‎04-11-2012

Microsoft has some pretty nice out-of-the-box solutions for authentication. You can use ASP.NET's SqlMembershipProvider to store and access user information in SQL server, then use the Silverlight AuthenticationService to access Membership information within Silverlight. Here's a walk-through: http://www.silverlight.net/learn/data-networking/authentication/how-do-i-use-aspnet-authentication-in-silverlight-3

‎02-27-2012

Anybody from ESRI out there who knows about this? Is it a known bug?

‎02-27-2012

I want to protect all credentials and logins from the client, since I am using ASP.NET forms authentication sitewide to control access. Would it be possible to define a useProxy property for each layer I create instead of using the proxy for everything?

‎02-24-2012

I have an app that loads secure AGS services, and I would like to use a proxy page to protect the credentials. However, I don't want to route all the basemap tiles through my proxy too. Is there a way to selectively use a proxy page for some layers and not others?

‎11-10-2011

You can download the source for KmlLayer here and tinker with it.

‎11-07-2011

John, I believe that the graphicslayer checks for a clusterer with each render pass, and overrides the symbols for each graphic with cluster symbols (and thus doesn't render the individual symbols for clustered graphics). Nothing is really changed on the individual graphic objects. Dominique's approach would be the least amount of custom coding, but it would involve double duty as 2 clusterers would be working in parallel doing the same work. You might see a performance hit for large feature collections. Alternatively you should be able to override the flareclusterer methods OnCreateGraphic() and ClusterGraphicsAsync() to tag each graphic with an attribute indicating that it was clustered (don't forget to reset them each time.)

Online Status	Offline
Date Last Visited	‎11-11-2020 02:23 AM

My Ideas

Latest Contributions by DanielWalton

Re: Elementlayer + Zoom fail

Re: Elementlayer + Zoom fail

Re: Elementlayer + Zoom fail

Bug in ElementLayer

Re: Feature Layer and multi-user concurrent editing

Re: Feature Layer and multi-user concurrent editing

Re: Feature Layer and multi-user concurrent editing

Feature Layer and multi-user concurrent editing

Re: Update attributes in FeatureLayer

Re: Authentication with login/password (SQL Server) ?

Re: FeatureServer REST metadata scrambles type order

Re: Selectively use Proxy page

Selectively use Proxy page

Re: KML layer not able to parse KML return data

Re: How to know if a Graphic is currently clustered?

Re: Design Question - Showing Dynamic Points on a ...

Re: ESRI JS API 3.14 does not support "Identity Ma...

Re: SQL Server Identity Provider with Encrypted Pa...