[mapguide-users] XML Parser error for Feature Sources

[cagray]

I tried your example and I always get an error of:

Object reference not set to an instance of an object.

when I do:

 fs.Parameter["DefaultFilePath"] = "C:\my.shp";

or other similar attempts for other providers. If I take this line out it
creates the resource no problem. Do you know why this would happen?

Also I tried to download the help (MaestroAPI.chm) off the website but none
of the help links work. Have I done something daft? 

Any help is appreciated.
Colin


Kenneth Skovhede, GEOGRAF A/S wrote:
> 
> Yes, you can do just that.
> Look in the Maestro source code to see how it's done.
> The files "ResourceEditors/ResourceEditorBase.cs"  and 
> "ResourceEditors/ResourceEditorGeneric.cs" shows it.
> Some more customized versions are avalible in eg
> "FeatureSourceEditorSDF.cs"
> 
> Basically you can do:
>     MaestroAPI.ServerConnectionI con; //You must initialize this, see 
> the developer docs
>     MaestroAPI.FeatureSource fs = new MaestroAPI.FeatureSource();
>     fs.Provider = "OSGeo.SHP.3.1";
>     fs.Parameter["DefaultFilePath"] = "C:\my.shp";
>     con.SaveResourceAs(fs, new MaestroAPI.ResourceIdentifier("my fs", 
> OSGeo.MapGuide.MaestroAPI.ResourceTypes.FeatureSource));
> 
> 
> As for your actual problem, does the server error log show anything?
> C:\program files\Mapguideopensource2.0\server\logs\error.log
> 
> Regards, Kenneth Skovhede, GEOGRAF A/S
> 
> 
> 
> cagray skrev:
>> Thanks for the reply. Unfortunately that did not solve my problem and I
>> got
>> the same error. Is there anything else I could try?
>>
>> I was not aware you could do this without generating/manipulating the
>> xml.
>> My web tool has to fully control setting up data sources. So the user
>> selects a provider and then fills in the connection details. I then need
>> to
>> create a new data source from this to be stored in mapguide. Can you do
>> this
>> using the Meastro API alone? 
>>
>>
>> Kenneth Skovhede, GEOGRAF A/S wrote:
>>   
>>> I believe the problem is the .Net UTF-8 Encoder prefixes an UTF-8 BOM,
>>> which causes problems in the Xml parser:
>>> http://trac.osgeo.org/mapguide/ticket/233
>>>
>>> You can try to create the UTF-8 encoder with:
>>>
>>> UTF8Encoding utf8 = new UTF8Encoding(false);
>>>
>>>
>>> And see if the problem goes away.
>>> Alternatively you can use the MaestroAPI instead of messing with the raw 
>>> Xml:
>>> http://trac.osgeo.org/mapguide/wiki/maestro/MaestroAPI
>>>
>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>>
>>>
>>>     
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> mapguide-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapguide-users
> 
> 

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