Because the mouse wheel delta value always is 120/-120, and the zoom in&out factor of mapview is *2 or /2. So the mapview scale will be fix in some value.
Problem:
How to custom zoom in&out value or function let mapview scale be more flexbility?
You can set the zoomfactor here: https://developers.arcgis.com/net/api-reference/api/netwin/Esri.ArcGISRuntime/Esri.ArcGISRuntime.UI.InteractionOptions.ZoomFactor.htmlmapView.InteractionOptions = new Esri.ArcGISRuntime.UI.MapViewInteractionOptions() { ZoomFactor = 1.5 };> Because the mouse wheel delta value always is 120/-120Some mice reports much smaller (but more frequent) intervals - in that case zooming switches to a much more discrete amount of zoom.Also try shift + drag to create a zoom box (ctrl+shift+drag to zoom out).
thank you so much @dotMorten_esri !!!! The zoomfactor is what I want to find, and it's really solve my problem! The mouse wheel delta value can ignore ~~
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