[MAPSERVER-USERS] Highlighting query results

[BrainDrain]

Instead of draw query I use map.saveQuery to file and then 'queryFile' param
of mapserv cgi. I think it is useful too (C# mapscript slower then cgi on
windows).

Steve Lime wrote:
> 
> MapServer supports what's called a query map. It basically replaces the
> color of the top-most
> style for a layer with one defined in the query map object (default is
> yellow). Typically in MapScript
> you'd do:
> 
>   a_layer.queryByAttributes(m_map, null, a_query, 1);
>   img = m_map.drawQuery();
> 
> You can of course get fancier and step through the result set by hand but
> I wouldn't recommend 
> starting that way.
> 
> Steve
>   
> 
>>>> On 9/2/2008 at 9:14 AM, in message
> <E1KaWeU-0008jG-00.shurhenv-mail-ru at f10.mail.ru>, shurhen
> <shurhenv at mail.ru>
> wrote:
>> Hi!
>> 
>> I'm newbie in mapserver :) 
>> 
>> I need to highlight query results. I wanna select object by attribute and 
>> then highlight it. But I've not found any information how can I do this.
>> Most 
>> of GIS have possibility to highlight selected objects, therefore I
>> suppose  
>> what MapServer has this ability too. "Selected" means to highlight object 
>> when I click at it, and to return to its previous color when I click at 
>> another object. 
>> I've found similar question
>> 
>> http://mapserver.gis.umn.edu/data2/wilma/mapserver-users/0309/msg00063.html 
>> 
>> but unfortunately it remains without any answer :(
>> 
>> If there is no way except to color selected object manually, please help
>> me 
>> to do this too.
>> 
>> Here is Mapscript code example based on the info what I found on this
>> site:
>> 
>> a_layer.queryByAttributes(m_map, null, a_query, 1);
>>             using (resultCacheObj results = a_layer.getResults())
>>             {
>>                 if (results != null && results.numresults > 0)
>>                 {
>>                     a_layer.open();
>>                     for(int i = 0; i < results.numresults; i++)
>>                     {
>>                         resultCacheMemberObj a_result = 
>> results.getResult(i);
>>                         shapeObj a_obj = 
>> a_layer.getFeature(a_result.shapeindex, a_result.tileindex);                  
>>      
>> 
>> 
>>                         //           WHAT NEXT??
>> 
>> 
>>                     }
>>                     a_layer.close();
>>                 }
>>             }
>> 
>> PS Sorry for my English, but I hope you've understood me
>> 
>> 
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>> mapserver-users at lists.osgeo.org 
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> 
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> 

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