[mapguide-users] XML Parser error for Feature Sources

Greenhough, Jamie JamieGreenhough at sierrasystems.com
Tue Dec 2 10:34:59 EST 2008

Thanks for the tip about Maestro chm file. I had the same problems until
I 'Unblocked' the file just now.!

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of cagray
Sent: Tuesday, December 02, 2008 1:29 AM
To: mapguide-users at lists.osgeo.org
Subject: Re: [mapguide-users] XML Parser error for Feature Sources

Thats works great.

I had written a web app which allows a user to completely customise the
appearances of layers. Behind the scenes it just edits the xml but I
the MaestroAPI could do this all for me without me touching the xml. I
to look into it more as I need to be able to save to both session and
library and always show the updates on a live map however the MaestroAPI
looks ideal.  

The help chm file, I can download fine but when I do, any links I try
open just come up with 'The address is not valid'. However turns out
this is
an intended security feature of IE. Basically to fix it all you have to
is right click on the chm file, go to properties and then click Unblock
it works. (Just in case anyone else has had the same issue)

Thanks for all your help!

Kenneth Skovhede, GEOGRAF A/S wrote:
> You have to initialize the parameter collection manually:
> fs.Parameter = new MaestroAPI.NameValuePairTypeCollection();
> (I forgot to mention that).
> I just tried to download MaestroAPI.chm, and the link works for me:
> Regards, Kenneth Skovhede, GEOGRAF A/S
> cagray skrev:
>> 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
>> 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,
>>> 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
>>> 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
>>>> xml.
>>>> My web tool has to fully control setting up data sources. So the
>>>> 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
>>>>> 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
>>>>> raw 
>>>>> Xml:
>>>>> http://trac.osgeo.org/mapguide/wiki/maestro/MaestroAPI
>>>>> Regards, Kenneth Skovhede, GEOGRAF A/S
>>> _______________________________________________
>>> mapguide-users mailing list
>>> mapguide-users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/mapguide-users
> _______________________________________________
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> mapguide-users at lists.osgeo.org
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