Latest Contributions by MarkCollins

What is the recommended way to find the proper map coordinates (geographic x/y) from a set of screen coordinates?  (In the old WPF API there was a method called ScreenToMap which would do this). My applications users are using drag/drop to place an icon on the map and I have the screen x/y and need to find out the map coordinates for that screen x/y. Thanks, Mark ... View more

In our application we are experiencing crashes, freezes, and failure to load the basemaps when the map control is loaded/unloaded multiple times during the maps lifecycle.  (Loading/unloading of a control may happen normally in WPF for many reasons, the most common is probably if the control is inside a TabControl. )  The only error message we are receiving is "The program '[24076] MyApp.exe' has exited with code -529697949 (0xe06d7363) 'Microsoft C++ Exception'." in the output window. I've attached a sample application that demonstrations the issue. The sample has two methods to reproduce the issue: 1) Automatic -  It will automate the switching of tabs/adding & removing graphics. This has consistently reproduced the issue on 3 separate dev enviroments (win 10 x64). It takes approx 20 seconds to execute. 2) Manual - This will reproduce the issue on 2 out 3 of our dev enviroments (all win 10 x64). Steps included in the sample. The sample also includes a flag called m_EnableMitigation which will activate code that helps mitigate the issue by removing and re-adding graphics layers to the map when it is loaded. We've called this a mitigation rather than a work around because it does not work 100% of the time. Its still possible to cause the issue if the control is loaded/unload very quickly by manually switching tabs or programmatically.  I think our issue may possibly be related to this post as well: https://community.esri.com/message/763969-re-application-crash-frequent-win32-exceptions-in-1002?commentID=763969#commen…  Please let me know if there is anyway to fix this issue. We will not be able to ship our application with this bug the way it is.  Thanks, Mark ... View more

What would be the recommended way to implement a click and drag selection marquee for selecting multiple features?  Should I use the Sketch editor to allow the user to draw a rectangle, get the geometry from the drawn shape, and then use SelectFeaturesAsync ?  Or is there better/easier way to support this functionality?  I've attached a screenshot that shows what I'm trying to accomplish.  Thanks, Mark ... View more