Working with the current selection

[Cory Gregor]

Hi,

I am kinda new to this and have not yet gone over all the posts. But maybe
one you can point me to a post or can help me with what I am trying to do.
Basically, I want handle a click or a double click event on the map. When
the user clicks a parcel or anyother point, I want to be able to get the
current selection so that I can display some custom properties related to
the point selected. What is the correct way to do this? Any help would be
appreciated. Thanks,

Siju



Alain Lebatard wrote:
> 
> Brian,
> 
>  
> 
> What you have tried before is the correct way to do, only the way you
> retrieved the selection was not correct. Here is how things work:
> 
>  
> 
> In Studio's Web layout editor, in your InvokeURL command definition,
> give a name to the parameter carrying the selection (I called it SEL in
> this example, you're free to give the name you want):
> 
>  
> 
>  
> 
>  
> 
> When the server-side script is invoked, the parameter SEL contains the
> XML description of the selection (snippet in C#)
> 
>  
> 
> ...
> 
> String selectionStr = Request.Form["SEL"];
> 
> MgSelection selection = new MgSelection(map);
> 
> selection.FromXml(selectionStr);
> 
> ...
> 
>  
> 
> Alain
> 
>  
> 
> -----Original Message-----
> From: Berdel, Brian [mailto:brian.berdel at mcmtrans.com] 
> Sent: Friday, April 28, 2006 8:23 AM
> To: users at mapguide.osgeo.org
> Subject: RE: [mapguide-users] RE: Working with the current selection
> 
>  
> 
> Never mind, finally got it using invoke script... thanks for all of your
> 
> help. 
> 
>  
> 
> -----Original Message-----
> 
> From: Berdel, Brian [mailto:brian.berdel at mcmtrans.com] 
> 
> Sent: Friday, April 28, 2006 10:15 AM
> 
> To: users at mapguide.osgeo.org
> 
> Subject: RE: [mapguide-users] RE: Working with the current selection
> 
>  
> 
> I have tried multiple things and for some reason (maybe I am an idiot)
> 
> but I am having trouble grasping how to grab the parameter in asp.net  
> 
> I know I am missing something.... thanks for your help. 
> 
> I have tried 
> 
>  
> 
> Dim resourceService As MgResourceService =
> 
> siteConnection.CreateService(MgServiceType.ResourceService)
> 
>         Dim featureService As MgFeatureService =
> 
> siteConnection.CreateService(MgServiceType.FeatureService)
> 
>         Dim queryOptions As New MgFeatureQueryOptions
> 
>         Dim map As New MgMap
> 
>         map.Open(resourceService, "mymap")
> 
>         Dim Selection As New MgSelection(map)
> 
>  
> 
>         Selection.FromXml("CurrentSelection") or
> 
> Selection.FromXml("$CurrentSelection")
> 
>  
> 
> -----Original Message-----
> 
> From: Alain Lebatard [mailto:alain.lebatard at autodesk.com] 
> 
> Sent: Wednesday, April 26, 2006 1:40 PM
> 
> To: users at mapguide.osgeo.org
> 
> Subject: RE: [mapguide-users] RE: Working with the current selection
> 
>  
> 
> $CurrentSelection is what you specify in Studio's web layout editor to
> 
> indicate that this command should send the current selection to the
> 
> server. When you create an Invoke URL command in Studio, look in the
> 
> "Additional parameters" tab, in the list "Pass in these additional
> 
> parameters to the URL". There you specify as "Key" the name of the
> 
> parameter you want for the selection, and as "Value" the macro
> 
> $CurrentSelection.
> 
>  
> 
> The viewer code will replace this macro with the actual value of the
> 
> selection at run-time, when the command is executed. The Asp.net script
> 
> will receive the XML description of the selection in the parameter you
> 
> specified in Studio. From there you can use an MgSelection object that
> 
> you can initialize either with the MgSelection constructor or the method
> 
> FromXml.
> 
>  
> 
> -----Original Message-----
> 
> From: Berdel, Brian [mailto:brian.berdel at mcmtrans.com] 
> 
> Sent: Wednesday, April 26, 2006 10:27 AM
> 
> To: users at mapguide.osgeo.org
> 
> Subject: RE: [mapguide-users] RE: Working with the current selection
> 
>  
> 
> Thanks for the response, but how would I reference the $CurrentSelection
> 
> parameter in asp.net?
> 
>  
> 
> -----Original Message-----
> 
> From: Alain Lebatard [mailto:alain.lebatard at autodesk.com] 
> 
> Sent: Wednesday, April 26, 2006 1:02 PM
> 
> To: users at mapguide.osgeo.org
> 
> Subject: RE: [mapguide-users] RE: Working with the current selection
> 
>  
> 
> The way to make it work for both the AJAX viewer and the DWF viewer is
> 
> to have the client send the current selection to your server-side
> 
> script, instead of having the server script trying to get the selection
> 
> from the session repository.
> 
>  
> 
> If your script is invoked from a web layout command 'Invoke URL', have
> 
> the current selection sent to the script by adding in Studio the
> 
> parameter $CurrentSelection to the command. If your script is invoked by
> 
> custom Javascript code, have this code retrieve the current selection
> 
> with GetSelectionXML() and add a parameter to your URL to send this
> 
> selection to the server. In this case be careful to use a POST request
> 
> and not a GET, as the size of the selection might exceed the maximum
> 
> length supported for a GET request (usually about 1K). Look at the
> 
> Submit() method in FormFrame, which makes it easy to do a POST request.
> 
>  
> 
> Alain
> 
>  
> 
> -----Original Message-----
> 
> From: kalpesh [mailto:kalpesh at pie-solution.com] 
> 
> Sent: Tuesday, April 25, 2006 9:50 PM
> 
> To: users at mapguide.osgeo.org
> 
> Subject: [mapguide-users] RE: Working with the current selection
> 
>  
> 
>  
> 
> But what if we want to make it work in DWF Viewer. Is there any
> 
> workaround ?
> 
>  
> 
> Kalpesh
> 
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> 
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> 
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