[mapserver-users] Re: WMSGetFeatureInfo problem (No results, using OL)

[Paul james]

Hi !

I dont think that it is the problem, because WMSGetFeatureInfo is generating
the "correct" url (I think)...

Anyway I tested querying only 1 single layer and got the same result...

Dammit :(

Thanks anyway

Stella

On Wed, Jan 27, 2010 at 12:24 PM, Eichner, Andreas - SID-NLKM <
Andreas.Eichner at sid.sachsen.de> wrote:

>
> Hi Stella,
>
> according to
> http://dev.openlayers.org/docs/files/OpenLayers/Control/WMSGetFeatureInfo-js.htmlthe WMSGetFeatureInfo control's constructor takes an array of
> OpenLayers.Layer.WMS objects. But you give it the list you used to draw as
> one layer. So you should create two OpenLayers.Layer.WMS objects, one for
> layer "Test1" and one for "Test2" and then give the control an array of
> them.
> So if I'm correct it should look something like that:
>
> var _test1 = new OpenLayers.Layer.WMS(
>                   "MyLayer 1",
>                   _mapfilex,
>                   {
>                    layers: [ 'Test1'],
>                    format: "image/png",
>                    transparent: "true"
>                   },
>                   {
>                    isBaseLayer: false,
>                    buffer: 0,
>                    visibility: true
>                   }
>                 );
> var _test2 = new OpenLayers.Layer.WMS(
>                   "MyLayer 2",
>                   _mapfilex,
>                   {
>                    layers: [ 'Test2'],
>                    format: "image/png",
>                    transparent: "true"
>                   },
>                   {
>                    isBaseLayer: false,
>                    buffer: 0,
>                    visibility: true
>                   }
>                 );
> var infoCtl = new OpenLayers.Control.WMSGetFeatureInfo({
>                      layers: Array(_test1, _test2),
>                      title: 'Click on the map to get information on
> layers',
>                      queryVisible: true,
>                      infoFormat: 'text/html'
>                  });
> infoCtl.events.register("getfeatureinfo",map,showInfo);
>
> function showInfo(evt) {
>  alert(evt.text);
> }
>
> Also I don't know how MapServer handles queries to two or more layers if at
> least one of them declares header or footer - it might happen that a layer
> without a header is processed before one with. And from what you got back I
> suggest that MapServer processes each layer if it was queried alone and
> therefore outputs the HTTP "Content-type" header after processing the first
> layer.
>
>
> Mit freundlichen Grüßen,
>
> Andreas Eichner
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> mapserver-users at lists.osgeo.org
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>
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