Class SparqlResultSet

Class for representing Sparql Result Sets.
Inheritance
System.Object
SparqlResultSet
Implements
System.Collections.Generic.IEnumerable<SparqlResult>
System.Collections.IEnumerable
System.IDisposable
System.Runtime.Serialization.ISerializable
System.Xml.Serialization.IXmlSerializable
Inherited Members
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: VDS.RDF.Query
Assembly: dotNetRDF.dll
Syntax
[Serializable]
public sealed class SparqlResultSet : IEnumerable<SparqlResult>, IEnumerable, IDisposable, ISerializable, IXmlSerializable

Constructors

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SparqlResultSet()

Creates an Empty Sparql Result Set.
Declaration
public SparqlResultSet()
Remarks
Useful where you need a possible guarentee of returning an result set even if it proves to be empty and also necessary for the implementation of Result Set Parsers.
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SparqlResultSet(Boolean)

Creates a Sparql Result Set for the Results of an ASK Query with the given Result value.
Declaration
public SparqlResultSet(bool result)
Parameters
Type Name Description
System.Boolean result
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SparqlResultSet(IEnumerable<SparqlResult>)

Creates a Sparql Result Set for the collection of results.
Declaration
public SparqlResultSet(IEnumerable<SparqlResult> results)
Parameters
Type Name Description
System.Collections.Generic.IEnumerable<SparqlResult> results Results.
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SparqlResultSet(SparqlEvaluationContext)

Creates a SPARQL Result Set for the Results of a Query with the Leviathan Engine.
Declaration
public SparqlResultSet(SparqlEvaluationContext context)
Parameters
Type Name Description
SparqlEvaluationContext context SPARQL Evaluation Context.

Properties

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Count

Gets the number of Results in the Result Set.
Declaration
public int Count { get; }
Property Value
Type Description
System.Int32
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IsEmpty

Gets whether the Result Set is empty and can have Results loaded into it.
Declaration
public bool IsEmpty { get; }
Property Value
Type Description
System.Boolean
Remarks
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Item[Int32]

Index directly into the Results.
Declaration
public SparqlResult this[int index] { get; }
Parameters
Type Name Description
System.Int32 index Index of the Result you wish to retrieve.
Property Value
Type Description
SparqlResult
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Result

Gets the Result of an ASK Query.
Declaration
public bool Result { get; }
Property Value
Type Description
System.Boolean
Remarks
Result Set is deemed to refer to an ASK query if the Variables list is empty since an ASK Query result has an empty <head>. It is always true for any other Query type where one/more variables were requested even if the Result Set is empty.
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Results

Gets the List of Results.
Declaration
public List<SparqlResult> Results { get; }
Property Value
Type Description
System.Collections.Generic.List<SparqlResult>
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ResultsType

Gets the Type of the Results Set.
Declaration
public SparqlResultsType ResultsType { get; }
Property Value
Type Description
SparqlResultsType
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Variables

Gets the Variables used in the Result Set.
Declaration
public IEnumerable<string> Variables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<System.String>
Remarks
As of 1.0 where possible dotNetRDF tries to preserve the ordering of variables however this may not be possible depending on where the result set originates from or how it is populated.

Methods

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Dispose()

Disposes of a Result Set.
Declaration
public void Dispose()
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Equals(Object)

Determines whether two Result Sets are equal.
Declaration
public override bool Equals(object obj)
Parameters
Type Name Description
System.Object obj
Returns
Type Description
System.Boolean
Overrides
System.Object.Equals(System.Object)
Remarks
Experimental and not yet complete.
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GetEnumerator()

Gets an Enumerator for the Results List.
Declaration
public IEnumerator<SparqlResult> GetEnumerator()
Returns
Type Description
System.Collections.Generic.IEnumerator<SparqlResult>
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GetObjectData(SerializationInfo, StreamingContext)

Gets the data for serialization.
Declaration
public void GetObjectData(SerializationInfo info, StreamingContext context)
Parameters
Type Name Description
System.Runtime.Serialization.SerializationInfo info Serialization Information.
System.Runtime.Serialization.StreamingContext context Streaming Context.
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GetSchema()

Gets the schema for XML serialization.
Declaration
public XmlSchema GetSchema()
Returns
Type Description
System.Xml.Schema.XmlSchema
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ReadXml(XmlReader)

Reads the data for XML deserialization (.Net serialization not the official SPARQL results serialization).
Declaration
public void ReadXml(XmlReader reader)
Parameters
Type Name Description
System.Xml.XmlReader reader XML Reader.
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ToTripleCollection(IGraph)

Converts a Result Set into a Triple Collection.
Declaration
public BaseTripleCollection ToTripleCollection(IGraph g)
Parameters
Type Name Description
IGraph g Graph to generate the Nodes in.
Returns
Type Description
BaseTripleCollection
Remarks
Assumes the Result Set contains three variables ?s, ?p and ?o to use as the Subject, Predicate and Object respectively. Only Results for which all three variables have bound values will generate Triples.
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ToTripleCollection(IGraph, String, String, String)

Converts a Result Set into a Triple Collection.
Declaration
public BaseTripleCollection ToTripleCollection(IGraph g, string subjVar, string predVar, string objVar)
Parameters
Type Name Description
IGraph g Graph to generate the Nodes in.
System.String subjVar Variable whose value should be used for Subjects of Triples.
System.String predVar Variable whose value should be used for Predicates of Triples.
System.String objVar Variable whose value should be used for Object of Triples.
Returns
Type Description
BaseTripleCollection
Remarks
Only Results for which all three variables have bound values will generate Triples.
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Trim()

Trims the Result Set to remove unbound variables from results.
Declaration
public void Trim()
Remarks
Note: This does not remove empty results this only removes unbound variables from individual results.
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WriteXml(XmlWriter)

Writes the data for XML serialization (.Net serialization not the official SPARQL results serialization).
Declaration
public void WriteXml(XmlWriter writer)
Parameters
Type Name Description
System.Xml.XmlWriter writer XML Writer.

Explicit Interface Implementations

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IEnumerable.GetEnumerator()

Gets an Enumerator for the Results List.
Declaration
IEnumerator IEnumerable.GetEnumerator()
Returns
Type Description
System.Collections.IEnumerator

Implements

System.Collections.Generic.IEnumerable<T>
System.Collections.IEnumerable
System.IDisposable
System.Runtime.Serialization.ISerializable
System.Xml.Serialization.IXmlSerializable

Extension Methods