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Kevin_Williams · #1 (**permalink**) 12-05-2006

Hi,
I got two questions for programming with map point

1) is there a way to programmatically change the layer?
i'm using map point 2006 and i'm trying to make a button click that will change the layer from "Road Map" -> "Road and Data Map" and back

2) is there a way to tell if a "drawn object" (like a drawn rectangle) is selected?
my program has a "delete" button, but it is only used to delete drawn objects. so i was hoping to have the delete button disabled if nothing was selected and enabled if something was selected.

thank so much

**Wilfried** · #2 (**permalink**) 12-05-2006

Hi,

You can use SelectionChange event for yoiu second question. As for you first question, there is no layers in mappoint.

Kevin_Williams · #3 (**permalink**) 12-05-2006

Oh! To change the map style, it's

Quote:

axMappointControl.ActiveMap.MapStyle = MapPoint.GeoMapStyle.geoMapStyle____;

I used the SelectionChange to catch the selection change
I also used axMappointControl.ActiveMap.Selection to let me know if something was selected or not.
However, I'm not able to tell if the selection is a drawn object (which I want) or a selection of a label (City, State, landmark, etc...)

**Wilfried** · #4 (**permalink**) 12-07-2006

Hi,

You can check if the NewSelection argument is a Direction, Location, Pushpin, Shape, or Waypoint object. In your case you can take acton when it is a Shape object.

Kevin_Williams · #5 (**permalink**) 12-07-2006

Sorry I have to ask this, but how to get get to the NewSelection argument?

I'm not sure what to call get the type of the selected object
axMappointControl.ActiveMap.Selection only gives me a System.__ComObject

**Wilfried** · #6 (**permalink**) 12-07-2006

Hi,

No problem. What is the programming language you do it ?

Kevin_Williams · #7 (**permalink**) 12-07-2006

I'm using C#
This is what I have so far (it's not much)

Quote:

private void axMappointControl_SelectionChange(object sender, AxMapPoint._IMappointCtrlEvents_SelectionChangeEvent e)
{
if (axMappointControl.ActiveMap.Selection == null)
{
// disable control
}
else
{
// enable control
}
}

**Wilfried** · #8 (**permalink**) 12-08-2006

Hi,

Code:

Shape shape = e.pNewSelection as Shape
if (shape == null)
    return;

does this help ?

Kevin_Williams · #9 (**permalink**) 12-20-2006

Thanks Wilfried
The snippet worked

I have the following:

Code:

private void axMappointControl_SelectionChange(object sender, AxMapPoint._IMappointCtrlEvents_SelectionChangeEvent e)
{
  MapPoint.Shape shape = e.pNewSelection as MapPoint.Shape;
  if (shape == null)
  {
     // disable control
  }
  else
  {
    // enable control
   }
}

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MapPoint Download - MP2K Magazine	This thread	Refback	12-06-2006 07:52 AM

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Layer and Selection Question

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