ArcGIS Pro Tool，单击显示坐标

protected override Task HandleMouseDownAsync(MapViewMouseButtonEventArgs e) {
            //Get the instance of the ViewModel
            var vm = OverlayEmbeddableControl as BasicEmbeddableControlViewModel;
            if (vm == null)
                return Task.FromResult(0);

            //Get the map coordinates from the click point and set the property on the ViewModel.
            return QueuedTask.Run(() =>
            {
                var mapPoint = MapView.Active.ClientToMap(e.ClientPoint);
                var sb = new StringBuilder();
                sb.AppendLine(string.Format("X: {0}", mapPoint.X));
                sb.Append(string.Format("Y: {0}", mapPoint.Y));
                if (mapPoint.HasZ) {
                    sb.AppendLine();
                    sb.Append(string.Format("Z: {0}", mapPoint.Z));
                }
                vm.Text = sb.ToString();
            });
        }