Re: [dotNetRDF-Support] Exception using QueryResultSet

[Rob V. <rv...@do...>]

Hi Aida

Your problem is that the endpoint you are providing is not actually an 
endpoint, SNORQL is simply a web interface which talks to an underlying 
SPARQL endpoint via AJAX.  Trying to treat SNORQL as an endpoint will 
not work as you will simply get back the HTML SNORQL page which is what 
the error message is complaining about - a web page is not a result set.

Notice at the top of the SNORQL page it says "SPARQL Explorer for 
http://data.linkedmdb.org/sparql" - this URL is the actual SPARQL 
endpoint you want to send the query to, so if you modify your code to 
use that as the endpoint URL it should work fine

Hope this helps

Rob Vesse

On 3/6/12 7:16 AM, Aida Martinez wrote:
> Hi,
>
> I'm trying to use your dotNetRDF library but I´m obtaining the 
> following exception:
> {"The SPARQL Endpoint returned unexpected Content Type 'text/html', 
> this error may be due to the given URI not returning a SPARQL Result Set"}
>
> This is my code:
>  SparqlRemoteEndpoint endpoint = new SparqlRemoteEndpoint(new 
> Uri("http://data.linkedmdb.org/snorql"));
>
>             //Make a SELECT query against the Endpoint
>             string query = @"PREFIX movie: 
> <http://data.linkedmdb.org/resource/movie/>
>                             SELECT ?o
>                             WHERE {
> <http://data.linkedmdb.org/resource/director/187> movie:director_name ?o
>                             }";
>             try
>             {
>                 SparqlResultSet result = 
> endpoint.QueryWithResultSet(query);
>             }
>             catch (Exception ex)
>             { string exe; }
>
> I don´t have any idea  why isn´t working. Can you help?
>
> Regards.
> -- 
> Aída Martínez
>
>
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