[mapguide-users] Selecting polygon

Sat Jan 17 10:12:49 EST 2009

Hi,
you have to create selection object on the server side and then send it 
as an XML to the viewer
Here is part of the code (in php) that I have used - taken mostly from 
developers guide and samples.
You can find everything there. It is not .net, but I think you can get 
the idea

<?php
......
        $selection = new MgSelection($map);
        $queryOptions = new MgFeatureQueryOptions();
        $queryOptions->SetFilter("....");   -> Your parcel id should be 
used in setting $queryOptions
        $featureReader = $layer->SelectFeatures($queryOptions);
        $selection->AddFeatures($layer, $featureReader, 0);
        $selectionXml = $selection->ToXml();
?>
<body class="AppFrame" onLoad="OnPageLoad()">
</body>
<script language="javascript">
function OnPageLoad()
{
selectionXml = '<?php echo $selectionXml; ?>';
parent.parent.SetSelectionXML(selectionXml);
}
</script>
....

Hope this will help. Most of these basic tasks are described in 
developer's guide

Regards : Stefan Dalakov

padmini godavarthi wrote:
>
>   Hi,
> iam using mapguide opensource 2.0(with .net 2.0 +IIS 5.1). i have a polygon
> layer loaded on the map.
> Now i want to select a particular polygon (for ex: parcel_id=222) on the map
> programmetically and i want to change the color of polygon . 
>
> i know that in maestro if i check features on layer are selectable then the
> polygon will be selected 
>
> but i want  to identify the polygon programmetically.
>
>
> 1) How is it possible?
>
> can any body plz help me so that it will be helpful to me.
>
>
>
> Thanks and Regards,
> Padmini.
>
>   