How to update/refresh overlays in GMap?

Question

I have this problem:

I have a list of points List<PointLatLng> and an overlay where a trajectory of the points is shown. I also use TabPages and inside one page there is the gMapcontrol. Unfortunately the trajectory is updated only when the page is not shown, I mean, when the focus is on another page.

Once I open the page with the Map the trajectory stops to update. How can I fix this?

I tried with:

BeginInvoke((Action)(() => gMapControl.Refresh()));

Inside the DataReceived event, but it only works as I said before.

how did you add your `PointLatLng` to the map? Are they markers? — SaschaP, Jan 29 '18 at 09:51
How about refreshing the 'gMapControl' inside `TabPage.GotFocus()` ? — Maverick, Apr 05 '18 at 04:12
Try to set the overlay visibility to false then set it back to true, it will force the map to redraw. — Ahmed GIS, Apr 10 '18 at 21:12
Ahmed's comment should be set as a real answer. This worked perfectly for my situation and there isn't even a flicker. Thank you! — Mikecito, Apr 25 '18 at 20:29

score 1 · Answer 1 · edited Oct 15 '20 at 15:52

1

I resolved this problem with:

gMapControl1.Zoom = -5;
gMapControl1.Zoom = 5;

edited Oct 15 '20 at 15:52

Joe Mayo

7,501
7
41
60

answered Oct 15 '20 at 15:03

Josshua Calixto

11
1

How to update/refresh overlays in GMap?

1 Answers1