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jasanite · #1 (**permalink**) 08-01-2007

Hi, me again.

Form form1 = new Form();
AxMappointControl mapPoint = new AxMappointControl();
form1.Controls.Add(mapPoint);
mapPoint.EndInit();
mapPoint.NewMap(2);
...
Calculate Route etc., to put it simple - some Data is inserted
...
form1.Show();

Now i want that when the form is closed, that the Data still
stays with my ActiveX Control and i can make further
operations. Maybe after that display it on another form.

// After
form1.Close();
// and
form2.Controls.Add(mapPoint);
mapPoint.EndInit();
// i make a operation that returns the
// ActiveRoute
mapPoint.ActiveMap.ActiveRoute

InvalidComObjectException - A Com-Object, which was disconnected
from the basis of RCW, can't be used - in the AxMapPoint.cs:
return this.ocx.ActiveMap; //Exception at that part

I think it got something to do with the Close-Method.

Any suggestions or solutions to this problem?

**Wilfried** · #2 (**permalink**) 08-04-2007

Hi,

As far as I know you cannot disconect an ActiveX and reconnect later. So I think the best solution is to geve it an Owner that stay alive during the lifetime of the program. For example your main form. Just pass it to the constructor of your class. You see example in my reply to your other post where I do something similar.

jasanite · #3 (**permalink**) 08-06-2007

Hi,

jep, didn't find a solution, i let my class have an
form which can be used before the other form is
closed. But got to do this step first by myself,
no secure way to make sure it won't be closed
before ^^

**Wilfried** · #4 (**permalink**) 08-07-2007

Hi,

Take the main form. You are sure is stay alive during lifetime of the application

jasanite · #5 (**permalink**) 08-08-2007

Hmm, can i give the owner to the main form but the
map will keep on apearing on the DockPanel thats floating
around.
Don't think so ... surprise me ^^

jlewis · #6 (**permalink**) 08-09-2007

You could save the map as a .ptm when you close the form - then when you need it again, load the .ptm back into a 'new' control - that's what I do...

**Wilfried** · #7 (**permalink**) 08-09-2007

Hi,

Not the owner of the main form, but the main form itself !
you could also create a Control that stay alive during the time it should be and give it as Owner, and destroy it when no longer needed

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Posted By	For	Type	Date
Working With Excel and MapPoint - MP2K Magazine	This thread	Refback	08-02-2007 02:23 AM

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