Implicit Conversion (Choices to GrammarBuilder)

Microsoft Speech Platform SDK 11

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Converts a Choices object to a GrammarBuilder object.

Namespace: Microsoft.Speech.Recognition
Assembly: Microsoft.Speech (in Microsoft.Speech.dll)

Syntax

Visual Basic (Declaration)
Public Shared Widening Operator CType ( _ choices As Choices _ ) As GrammarBuilder

Visual Basic (Usage)
Dim input As Choices Dim output As GrammarBuilder output = CType(input, GrammarBuilder)

C#
public static implicit operator GrammarBuilder ( Choices choices )

Parameters

choices: Type: Microsoft.Speech.Recognition..::..Choices
The set of alternatives to convert.

Return Value

Type: Microsoft.Speech.Recognition..::..GrammarBuilder

The converted Choices object.

Remarks

Implicit conversion creates a new instance of GrammarBuilder.This conversion operator is equivalent to calling GrammarBuilder(Choices) and specifying choices for the alternateChoices.

Examples

The following example creates a speech recognition grammar that can recognize a response to a "yes" or "no" question. The implicit conversion operator is used in the construction of a SemanticResultValue object from a Choices object, in the construction of a Choices object from two SemanticResultValue objects, and in the construction of a Grammar object from a SemanticResultKey object.

C#	Copy Code
Choices yesChoices = new Choices(new string[] {"yes", "yup", "yah"}); SemanticResultValue yesValue = new SemanticResultValue(yesChoices, true); Choices noChoices = new Choices(new string[] { "no", "nope", "nah" }); SemanticResultValue noValue = new SemanticResultValue(noChoices, false); SemanticResultKey yesnoKey = new SemanticResultKey("yesno", new Choices(new GrammarBuilder[] { yesValue, noValue })); Grammar yesnoGrammar = new Grammar(yesnoKey); yesnoGrammar.Name = "yesno";

Copy Code

Choices yesChoices = new Choices(new string[] {"yes", "yup", "yah"});
SemanticResultValue yesValue =
  new SemanticResultValue(yesChoices, true);

Choices noChoices = new Choices(new string[] { "no", "nope", "nah" });
SemanticResultValue noValue =
  new SemanticResultValue(noChoices, false);

SemanticResultKey yesnoKey =
  new SemanticResultKey("yesno", new Choices(new GrammarBuilder[] { yesValue, noValue }));

Grammar yesnoGrammar = new Grammar(yesnoKey);
yesnoGrammar.Name = "yesno";