[mapguide-users] Highlighting selected features

[Nichols, Mark A.]

I had similar problems last week.  I've attached my source code below.  This source code runs within the task pane.

I had used ArcGIS to create a personal geodatabase with an x and a y field.  So I can do all of my querying outside of MapGuide but within the task pane.  However I still wanted to zoom to the feature in MapGuide and select it.

Here's the code to do that....if you already have coordinates of the feature.  That's probably the biggest difference in our code.  I have all of my parcel centroids created outside of mapguide as well as the parcel numbers to query on.  And those parcel centroids are only used to zoom to that area, not for selecting the features.  I select by the parcel number.

I did run into some problems to note:
- I had a hard time querying the parcel based on a string.  That's why I'm querying on OBJECTID because its a number field.  I can't explain this.
- In my MAP in MapGuide Maestro, be careful of the name on the layer under the layer properties.  The name must match whats in your code.

Maybe my code will help you troubleshoot yours.  Maybe someone else has a direct answer to your question.


*********** PAGE SOURCE CODE ************


<script language="javascript">

<?php

    include 'common.php';
    include 'constants.php';

    SetLocalizedFilesPath(GetLocalizationPath());
    GetRequestParameters();

        InitializeWebTier();
        $cred = new MgUserInformation($sessionId);

        //connect to the site and get a feature service and a resource service instances
        $site = new MgSiteConnection();
        $site->Open($cred);
        $featureSrvc = $site->CreateService(MgServiceType::FeatureService);
        $resourceSrvc = $site->CreateService(MgServiceType::ResourceService);

		$map = new MgMap();
		$map->Open($resourceSrvc, "Default");

		$queryOptions = new MgFeatureQueryOptions();
		$queryOptions->SetFilter("OBJECTID = $QueryID");
		
		$countryDataResId = new MgResourceIdentifier("Library://Site_Folder/Data and Layers/parcel_hyperlinks.FeatureSource");
		
		$featureReader = $featureSrvc->SelectFeatures($countryDataResId, "Hyperlinks_Parcels", $queryOptions);
		$layer = $map->GetLayers()->GetItem('parcel_hyperlinks');
		$selection = new MgSelection($map);
		$selection->AddFeatures($layer, $featureReader, 0);
		$selectionXml = $selection->ToXml();
		echo 'var theXML=\'' . $selectionXml . '\';';	

		?>
			
				parent.parent.mapFrame.SetSelectionXML(theXML);
				parent.parent.mapFrame.ZoomToView(<?php echo $gotoxy; ?>, 980, true)
				history.back()
			
			</script>
		
		<?php




function GetParameters($params)
{
    global $mapName, $sessionId;

    if(isset($params['LOCALE']))
        $locale = $params['LOCALE'];
    $mapName = $params['MAPNAME'];
    $sessionId = $params['SESSION'];
}

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


?>

************** END PAGE ************




-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org on behalf of Langen, Gido
Sent: Tue 10/27/2009 4:49 PM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] Highlighting selected features
 
I want to highlight selected features.  I have pretty much copied the
code from the documentation.  But it doesn't work.  Below is the code.
Aside from not highlighting the selected feature, I do not understand
why the line    "<br>XML: <? echo $selectionXML; ?>"  in the code does
not print the XML block that I would expect.  At appears to me that the
"$selection->ToXML"   request doesn't create output.  

Can anybody help?
Gido




<?
include '../mapviewerphp/common.php';
include '../mapviewerphp/constants.php';
$configFilePath = '../webconfig.ini';
 
MgInitializeWebTier($configFilePath);

$args = ($_SERVER['REQUEST_METHOD'] == "POST")? $_POST : $_GET;

$sessionId = $args['SESSION'];
$mapName = $args['MAPNAME'];

$userInfo = new MgUserInformation($sessionId);
$siteConnection = new MgSiteConnection();
$siteConnection->Open($userInfo);
?>

<html>
<head> <title> TEST </title> </head>

<body onLoad="OnPageLoad">

<?
$map = new MgMap($siteConnection);
$map->Open($mapName);
$layer = $map->GetLayers()->GetItem('peguis');
$layerName = $layer->GetName();
$parcelQuery = new MgFeatureQueryOptions();
$parcelQuery->SetFilter("PIN = 1092213");
$featureReader = $layer->SelectFeatures($parcelQuery);
$featureReader->ReadNext();
$attVal = $featureReader->GetString("PARCELDESI");
$selection = new MgSelection($map);
$selection->AddFeatures($layer, $featureReader, 0);
$selectionXML = $selection->ToXml;
?>

<br>Test: <? echo $attVal; ?> 
<br>XML: <? echo $selectionXML; ?>
</body>

<script language="javascript" type="text/javascript">
  function OnPageLoad() {
    selXML = '<? echo $selectionXML; ?>
    parent.parent.mapFrame.SetSelectionXML(selXML);
  }
</script>
</html>