[mapguide-users] What is %24CurrentSelection???

[Chris Claydon]

If your date.php file is on a separate server, it seems like a good idea to save the sample code in a local file, as you've done, and then make that script issue a subsequent request to date.php.

It looks like the SESSION parameter is not getting sent to your script. It could be a case issue - it might get sent as lowercase 'session' instead. Are you able to use Fiddler or Firebug to determine which parameters are actually getting sent to your script? I also remember seeing a defect where the parameters got sent twice, which caused problems.

If your InvokeUrl.js (in the fusion/widgets folder) contains a section like this:

    execute : function() {
        var url = this.sBaseUrl;
        //add in other parameters to the url here
        
        var map = this.getMap();
        var params = [];
        params.push('LOCALE='+Fusion.locale);
        params.push('SESSION='+map.getSessionID());
        params.push('MAPNAME='+map.getMapName());
        params = params.concat(this.additionalParameters);

try changing it to:

    execute : function() {
        var url = this.sBaseUrl;
        //add in other parameters to the url here

        var map = this.getMap();
        var taskPaneTarget = Fusion.getWidgetById(this.sTarget);
        var params = [];
        if ( taskPaneTarget == null ) {
            params.push('LOCALE='+Fusion.locale);
            params.push('SESSION='+map.getSessionID());
            params.push('MAPNAME='+map.getMapName());
        }
        params = params.concat(this.additionalParameters);

An alternative approach would be to fix the InvokeUrl.js file so that it handles the $CurrentSelection variable correctly, but that would require a bit of figuring out.

Chris.

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of achectl
Sent: Wednesday, March 25, 2009 3:40 AM
To: mapguide-users at lists.osgeo.org
Subject: RE: [mapguide-users] What is %24CurrentSelection???


I also tried to put the php file to fusion template directory and then run the invokeurl widget. 
<?php
   
    $mapName = "";
    $sessionId = "";
       
    try
    {
        // Initialize the web tier API
        MgInitializeWebTier("C:\Program Files\MapGuideOpenSource2.0\WebServerExtensions\www\webconfig.ini");
       
        // Read the map name and session ID
        GetRequestParameters();

        // Create a site connection
        $user = new MgUserInformation($sessionId);
        $siteConnection = new MgSiteConnection();
        $siteConnection->Open($user);
       
        // Create a resource service instance
        $resourceService = $siteConnection->CreateService(0);
               
        // Retrieve the selection
		$selection = new MgSelection($map, $selectionXml); 
        //$selection = new MgSelection();
        //$selection->Open($resourceService, $mapName);
       
        // Output the selection
        echo $selection->ToXml();
    }
    catch(MgException $e)
    {
        // Output error details
        echo "<Message>" . $e->GetMessage() . "</Message>";
        echo "<Details>" . $e->GetDetails() . "</Details>";
    }
       
       
    function GetParameters($params)
    {
        global $mapName;
        global $sessionId;

        $mapName = $params['MAPNAME'];
        $sessionId = $params['SESSION'];
    }

    function GetRequestParameters()
    {
        if($_SERVER['REQUEST_METHOD'] == "POST")
            GetParameters($_POST);
        else
            GetParameters($_GET);
    }
?> 


It prompts the error as below:

Invalid argument(s): [1] = "" The session ID is invalid because the session separator character was not found.Invalid argument(s): [1] = "" The session ID is invalid because the session separator character was not found. Exception occurred in method MgUserInformation.SetMgSessionId at line 183 in file d:\build\mapguide_open_source_v2.0\build_30.11\mgdev\common\mapguidecommon\System/UserInformation.cpp 

The php file should be run the same server with mapguide.


Hi Chris,

I tried to add the syntax to the date.php by using "include "mapguide.php";", the MgInitializeWebTier path was updated. And I would like to mention that the date.php isn't running into mapguide web server. It is running on xampp LAMP software of Windows.

And I tried to run the php program date.php, the error was prompted.
Fatal error: Call to undefined function mginitializewebtier() in C:\xampp\htdocs\mrbs\web\mapguide.php on line 9

Also I have added the path as below into the php.ini file.
; Directory in which the loadable extensions (modules) reside.
extension_dir = "C:\Program Files\MapGuideOpenSource2.0\WebServerExtensions\php\ext"
extension=php_MapGuideApi.dll
The result is same.

I have question, why the parameter (e.g. SESSION, LOCALE & MAPNAME) of invokeURL.js file do not added to the date.php, but the invoke url have right parameters! It is not %24CurrentSelection. 


Thanks.





You should be able to include this code at the beginning of your own php file. I believe it is called date.php. This file presumably does something useful with the information about the current selection. You should be able to retrieve the information you need from the MgSelection object using some simple php calls instead of calling echo $selection->ToXml().

>From your original screenshots it looks like you have already managed to create an InvokeURL command in MapGuide Studio, but if you have specific questions about the process, let me know.

Chris.


-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of achectl
Sent: Tuesday, March 17, 2009 10:52 PM
To: mapguide-users at lists.osgeo.org
Subject: RE: [mapguide-users] What is %24CurrentSelection???


Thanks a lot Chris

Which file I need to modify and copy & place the below PHP code to that file
for testing? I will try to modify the code. Note: I will change the path for
webconfig.ini. :-( I need to complete the invokeURL problem asap. What is
the proper way to do InvokeURL of MapGuide Studio? 

Thanks
Achectl


Chris Claydon wrote:
> 
> In a basic web layout, I'm pretty sure $CurrentSelection returns you the
> current selection in XML format. This corresponds to the string you get if
> you call ToXml() on an MgSelection object using the web tier API.
> 
> It appears that the flexible web layout code does not treat
> $CurrentSelection as a special case, and simply returns the URL-encoded
> version of variable name itself.
> 
> The solution is to get hold of the MgSelection object for the current map
> selection within the invoked PHP code. The following PHP code will dump
> out the selection XML. You should be able to extend it pretty easily to
> extract exactly what you need from the selection...
> 
> (Note that you may need to adjust the path to the webconfig.ini file in
> the call to MgInitializeWebTier)
> 
> Hope this helps,
> 
> Chris.
> 
> <?php
>     
>     $mapName = "";
>     $sessionId = "";
>         
>     try 
>     {
>         // Initialize the web tier API
>         MgInitializeWebTier("C:/Program
> Files/Autodesk/MapGuideEnterprise2009/WebServerExtensions/www/webconfig.ini");
>         
>         // Read the map name and session ID
>         GetRequestParameters();
> 
>         // Create a site connection
>         $user = new MgUserInformation($sessionId);
>         $siteConnection = new MgSiteConnection();
>         $siteConnection->Open($user);
>         
>         // Create a resource service instance
>         $resourceService = $siteConnection->CreateService(0);
>                 
>         // Retrieve the selection
>         $selection = new MgSelection();
>         $selection->Open($resourceService, $mapName);
>         
>         // Output the selection
>         echo $selection->ToXml();
>     }
>     catch(MgException $e) 
>     {
>         // Output error details
>         echo "<Message>" . $e->GetMessage() . "</Message>";
>         echo "<Details>" . $e->GetDetails() . "</Details>";
>     }
>         
>         
>     function GetParameters($params)
>     {
>         global $mapName;
>         global $sessionId;
> 
>         $mapName = $params['MAPNAME'];
>         $sessionId = $params['SESSION'];
>     }
> 
>     function GetRequestParameters()
>     {
>         if($_SERVER['REQUEST_METHOD'] == "POST")
>             GetParameters($_POST);
>         else
>             GetParameters($_GET);
>     }
> ?>
> 
> 
> 

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