[mapserver-users] getting field names using mapscript

[Umberto Nicoletti]

Sorry don't know that :-(

On Thu, Nov 6, 2008 at 2:32 PM, Jochen Wagner <jochen.wagner8 at googlemail.com>
wrote:
> thanks, works fine and fast for each layer:
>
> $layer->open();
> $myitems = $layer->getItems();
>
> foreach($myitems as $item) {
>        echo $item."<br>";
> }
> $layer->close();
>
> but how can I get the numer of records without a query?
> Jo
>
>
> 2008/11/6 Umberto Nicoletti <umberto.nicoletti at gmail.com>:
>> You can use the items array on the layer object to get the field names
>>
>> On Thu, Nov 6, 2008 at 12:10 PM, Jochen Wagner
>> <jochen.wagner8 at googlemail.com> wrote:
>>> Hi list,
>>> I would like to list from any layer ($ qlayer) only the field names of
>>> the attribute tables and the number of objects in the table.
>>>
>>> With this code it works already:
>>>
>>> //loading mapfile
>>> $map= ms_newMapObj($mapfilepath.'\
>>> demo.map');
>>>
>>> //set layer
>>> $layer = $map->getLayerByName($qlayer);
>>>
>>> //rectquery via mapextent
>>> @$datQuery = $layer->queryByRect($map->extent);
>>>
>>> //if query is successful
>>> if ($datQuery == MS_SUCCESS) {
>>>  //number of objects
>>>  $resnum = $layer->getNumResults();
>>>  echo 'Anzahl: '.$resnum.'<br>';
>>>
>>>  $layer->open();
>>>  $result = $layer->getResult(0);
>>>  $shpobj = $layer->getShape($result->tileindex,$result->shapeindex);
>>>
>>>  //read attribute table
>>>  $attr = $shpobj->values;
>>>  foreach($attr as $name=>$wert) {
>>>     echo 'Feld: '.$name.'<br>';
>>>  }
>>> }
>>> $shpobj->free();
>>> $layer->close();
>>>
>>> However, this method has the disadvantage using a layers with many
>>> records the script takes a very long time, I guess because I have a
>>> query about the whole issue run.
>>> Has someone an approach for me, getting
>>> 1. the field names of the table and
>>> 2. the number of objects in the table
>>> performantly using MapScript ?
>>> thanks
>>> Jo
>>> _______________________________________________
>>> mapserver-users mailing list
>>> mapserver-users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>
>>
>
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