Latest Contributions by JohnWoon

‎05-27-2015

I am using a feature service with the ondemand mode (no editing request), and I would like to obtain which feature the user clicked. So when a tapped event fires, I may do a hittest on the feature layer so that I obtain the id of the feature. But I want more, not only the id, but the geometry info and the attached attributes. With the only id, I have to do a remote query to obtain the full info. of the feature, this cloud take a significant time. And I think this approach is a bad solution. I need a direct way. Any one could provide a remote query free solution? Thanks.

‎05-20-2015

Thanks for Antti Kajanus. I decide to hold a weak reference of the MapView in the ViewModel using AttachedProperty tech.. I think it's better to hold the mapview reference (or weak reference) in the ViewModel directly rather than having a MapViewController in between when we need to access the map at the same time, since the map is defined in the ViewModel and is heavy business logic relative.

‎05-19-2015

Hi all, I'm trying to separate MapView and Map. Following the guide "Use the MVVM design pattern—ArcGIS Runtime SDK for .NET | ArcGIS for Developers ". But it seems unable to a hittest in the viewmodel, because the viewmodel have no reference to the MapView and the hittest method need a MapView as a parameter. I implemented a EventToCommand trigger to bind the MapViewTapped event to a RelyCommand, using the mvvm light toolkit library provided by MVVM Light Toolkit . I could get the EventArgs (Esri.ArcGISRuntime.Controls.MapViewInputEventArgs), but not the sender which should be the instance of the MapView control. Hope somebody show me a better solution, thanks in advance.

‎05-13-2015

HitTesting only returns an array of the feature ids, not graphics. And I am not quite sure, but it seems "var features = await cities.FeatureTable.QueryAsync(rows);" may re-query the server. I tried a similarly way before, and I found that I could retrieve more attributes than the outfields I defined before. I there a possible way to query locally cached data? So it may speed up.

‎05-13-2015

I would like to obtain informations(the instance) of the clicked feature in a feature layer. In runtime for wpf we have the MouseLeftButtonDown event provided by the graphicslayer class. The event will pass the clicked instance, but not a equivalent one could be found in runtime for .net.

‎05-13-2015

To detect the problem source, I have created a simple application. It runs fine at other pcs but my laptop. I tried the query urls at IE and could receive correct results. No initialization errors found. At first I was using windows 10 preview os, and I thought it was the problem. So I re install windows 8.1 but still not displaying any feature.

‎05-11-2015

I have run into the same issue, it quite weird. Still don't know how to fix it. wpf application, Windows 8.1, visual studio 2013 ultimate, arcgis runtime sdk 10.2.4 (or 10.2.5) feature layer not displaying.

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Date Last Visited	‎11-11-2020 02:25 AM

My Ideas

Latest Contributions by JohnWoon

Could a hittest returns a complete feature other than the id of the feature?

Re: how to do a hittest in mvvm patten

how to do a hittest in mvvm patten

Re: How to get the clicked graphic(or a feature) in a graphicslayer(or a featurelayer) using runtime sdk for .ne

How to get the clicked graphic(or a feature) in a graphicslayer(or a featurelayer) using runtime sdk for .ne

Re: Feature layers don't display on the map (WPF Application)

Re: Feature layers don't display on the map (WPF Application)