[mapguide-users] Creating a temporary feature source that is not an SDF file

[adnanc]

Thankyou Jackie for explaining the solution so well.

Just tried it and it worked fine.

Regards,

Adnan


Jackie Ng wrote:
> 
> If you understand that feature sources are just xml documents that
> describe a FDO connection to a particular data store, then
> CreateFeatureSource()/MgCreateSdfParams is just a convenience method that
> does the following:
> 
> 1) Create the SDF file, with the specified schema
> 2) Create an XML feature source document for this created SDF
> 3) Sets the resource content (feature source) based on the given resource
> id
> 4) Uploads the created SDF file as the resource data for the given
> resource id
> 
> What is so special about MgCreateSdfParams is that it can create the SDF
> data store for you (the 1st part). For anything other than SDF, this data
> store creation ability is not exposed and you will need to have the data
> on hand already or use the FDO API to create the data store. 
> 
> However you can achieve the same effect (parts 2, 3 and 4) using
> SetResource() and SetResourceData() methods of MgResourceService.
> 
> I think in your case, what you want to do is to copy the raster feature
> source to your session repository, and modify its configuration document.
> No CreateFeatureSource() call is required.
> 
> Hope that helps.
> 
> - Jackie
> 
> 
> adnanc wrote:
>> 
>> Hello all,
>> 
>> I am currently serving georeferenced tiffs with the GDAL provider, using
>> a config file for indexing them.
>> 
>> A requirement I have is to enable a user to select an area of interest
>> and be able to programmatically generate the config file of tiffs for
>> that particular area.  I have been able to complete this functionality
>> using the gdal api.
>> 
>> The next step is to create a session based layer for displaying these
>> tiffs, however this also needs a session based feature source.  I have
>> created a session based feature source but it is an SDF feature source.  
>> 
>> Doing the following will add the config file to the feature source, but
>> it will not display any tiffs. 
>> 
>> resourceService.SetResourceData(resID, "ConfigurationDocument", "Stream",
>> byteReader);
>> 
>> The MgFeatureSourceParams class only has one concrete class
>> MgCreateSdfParams.
>> 
>> Has any one had a similar requirement or know of a workround for the
>> above problem.
>> 
>> Thanks for your time,
>> 
>> Adnan
>> 
> 
> 

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