Hi guys,I am using mouse_move event to show the coordinates of the position. Just like this sample: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#MouseCoordsBut the projection of the maps in the map service is Transverse_Mercator and I want to display the coordinates in lat/long. I know geometry service supports projection task and I tied this method in my codes. But since we all move mouse very quickly and frequently and every move needs projection, this method really slows down the response time...I really would like to know whether there is a api or method to do this without projection every mousemove point nor kill the performance. Any thoughts or clues? Thank you!!Below are my codes:
private void MyMap_MouseMove(object sender, System.Windows.Input.MouseEventArgs args)
{
if (MyMap.Extent != null)
{
System.Windows.Point screenPoint = args.GetPosition(MyMap);
ESRI.ArcGIS.Client.Geometry.MapPoint mapPoint = MyMap.ScreenToMap(screenPoint);
//MapCoordsTextBlock.Text = string.Format("Map Coords: X = {0}, Y = {1}",
//Math.Round(mapPoint.X, 4), Math.Round(mapPoint.Y, 4));
//MapPoint inputMapPoint = new MapPoint(x, y, new SpatialReference(4326));
//use geometryservice's project utility
//GeometryService geometryService = new GeometryService("http://rmms-dev.atlas.illinois.edu/ArcGIS/rest/services/Geometry/GeometryServer");
//geometryService.ProjectCompleted += MouseCoordinate_geometryService_ProjectCompleted;
//geometryService.Failed += GeometryService_Failed;
//geometryService.ProjectAsync(new List<Graphic>() { new Graphic() { Geometry = mapPoint } }, new SpatialReference(4326), mapPoint);
}
}
void MouseCoordinate_geometryService_ProjectCompleted(object sender, GraphicsEventArgs e)
{
Graphic resultGraphic = e.Results[0];
MapPoint resultMapPoint = resultGraphic.Geometry as MapPoint;
MapCoordsTextBlock.Text = string.Format("Map Coords: X = {0}, Y = {1}",
Math.Round(resultMapPoint.X, 4), Math.Round(resultMapPoint.Y, 4));
}
