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Anonymous · #1 (**permalink**) 12-29-2003

Hello...

We are have a vb.net app and are able to display a map with pushpins that represent the results from a sql server database query. This works fine. Now....I need to be able to let the user double-click on one of the pushpins and then display a modal dialog that contains some detailed info about the pushpin location. Is this possible? I saw some articles and posts that mention the SelectedChange event....but I am having problems getting this to work. If anyone knows of a good sample or article that would be appreciated.

Thank you

mrobold · #2 (**permalink**) 12-30-2003

Well, if you're looking to trap what they've selected, you can use the selection changed event like so:

Code:

Private Sub MapCtrl_SelectionChange(ByVal sender As Object, ByVal e As AxMapPoint._IMappointCtrlEvents_SelectionChangeEvent) Handles MapCtrl.SelectionChange

        If TypeOf (e.pNewSelection) Is MapPoint.Pushpin Then

            ' A pushpin has been selected, get a reference to it
             Dim pin As MapPoint.Pushpin = e.pNewSelection

             ' Call your method to display the box
             Me.DisplayPinDetails(pin)

        End If

    End Sub

Of course, this will happen on a single-click instead of a double-click. Your other option would probably be to trap the BeforeDoubleClick event, determine the appropriate pushpin, and then run the same detail method.

E.G.

Code:

Private Sub MapCtrl_DblClick(ByVal sender As Object, ByVal e As AxMapPoint._IMappointCtrlEvents_BeforeDblClickEvent) Handles MapCtrl.DoublClick
        Dim searchResults As MapPoint.FindResults = Me.ActiveMap.ObjectsFromPoint(e.x, e.y)
        Dim pin As MapPoint.Pushpin
        For Each result As Object In searchResults
            If TypeOf result Is MapPoint.Pushpin Then
                pin = result
                Exit For
            End If
        Next

        ' Call your method to display the box
         Me.DisplayPinDetails(pin)
End Sub

Of course, the above code assumes you've only got one pushpin at the selection point. If you want to plan for many pushpins, you'll have to present the user with a list of those to make a selection.

BEWARE: This may cause your app to hang if your "DisplayPinDetails" method takes too long to run (I'm having problems along that line due to OleServer timeouts).

Hope this helps.

MR

Anonymous · #3 (**permalink**) 12-31-2003

Thank you very much. I was having many problems trying to figure out how to refer to the object and determine a pushpin selection.

Thanks!

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