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

[Chris Claydon]

Hi Achectl,

It is encouraging that it got that far before it failed this time. In the code below, you've commented out the original call to get the selection from the map, and instead retrieve it from the $selectionXml parameter. I don't see this defined anywhere, which is presumably why it fails.

Try changing this:

        // Retrieve the selection
		$selection = new MgSelection($map, $selectionXml); 
        //$selection = new MgSelection();
        //$selection->Open($resourceService, $mapName);

To this:

        // Retrieve the selection
        $selection = new MgSelection();
        $selection->Open($resourceService, $mapName);
        $selectionXml = $selection->ToXml();

Chris.

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of achectl
Sent: Thursday, March 26, 2009 3:33 AM
To: mapguide-users at lists.osgeo.org
Subject: RE: [mapguide-users] What is %24CurrentSelection???


Hi Chris,

I've tried to follow your script and try to modify a little of date.php as below:
<?php
   
    $mapName = "";
    $sessionId = "";
	$ID = "";
	$Area = "";
       
    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;
		global $ID;
		global $Area;

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

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

After click the invokeURL command of the fusion layout, it prompts the error "Default49cb4916a1dfe$CurrentSelection$CurrentSelectionAn unclassified exception occurred.An unclassified exception occurred. Exception occurred in method new_MgSelection at line 12308 in file .\MgApi_wrap.cpp" of the new date.php window. 

The $ID & $Area is the key of the invokeURL.js. It seems that the proper value still can't to find! I think it should be something missing of the date.php. 

Thanks
Achectl



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.
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