topic Re: popup is empty when using CalloutDefinition with a Graphic as param in .NET Maps SDK Questions

popup is empty when using CalloutDefinition with a Graphic as param

MarcusHakansson — Thu, 14 Sep 2017 13:41:04 GMT

I'm using IdentifyGraphicsOverlayAsync to get my results from an GraphicsOverlay when I "Tap".

The Graphic i get has Geometry and Attributes with three Keys and Values and I then use "CalloutDefinition" to display the values in map and the Popup gets visible in the right location but its empty.

MyMapView.ShowCalloutAt( e.Location, myGraphic);

Re: popup is empty when using CalloutDefinition with a Graphic as param

JoeHershman — Fri, 15 Sep 2017 12:45:33 GMT

You need to set the Text property on the CalloutDefinition. It does not automatically read the Attributes and display

Re: popup is empty when using CalloutDefinition with a Graphic as param

MarcusHakansson — Fri, 15 Sep 2017 12:54:26 GMT

Is there any way that I can display my Attributes with ShowCalloutAt as a Grid?

I was aiming for something like this:

Re: popup is empty when using CalloutDefinition with a Graphic as param

JoeHershman — Fri, 15 Sep 2017 13:03:52 GMT

Well since that is a image I posted, yes it is possible. But there is a lot behind how it is implemented. It uses a custom view that has an items control bound to a collection built out from the PopupDefinition, There is a ShowCalloutAt method that takes a UIElement as a parameter and what you see in the above image uses that method. This was actually designed at 100.0 before the Callout feature was added to the API

Re: popup is empty when using CalloutDefinition with a Graphic as param

MarcusHakansson — Fri, 15 Sep 2017 13:14:42 GMT

Ok, thank you now. I know a little bit more. I'm right know trying to make some changes to the ControlTemplate of the Callout-Class to achieve something like this but not entirely happy with the result so far.

Re: popup is empty when using CalloutDefinition with a Graphic as param

dotMorten_esri — Fri, 15 Sep 2017 17:34:43 GMT

You will want to create a custom UserControl that can present the attributes of a graphic. Then create the user control and pass it into this overload, instead of using the Callout Definition:

https://developers.arcgis.com/net/latest/wpf/api-reference//html/M_Esri_ArcGISRuntime_UI_Controls_GeoView_ShowCalloutAt_1.htm