Note
Please see Azure Cognitive Services for Speech documentation for the latest supported speech solutions.
GrammarBuilder Implicit Conversion (Choices to GrammarBuilder)
Converts a Choices object to a GrammarBuilder object.
Namespace: Microsoft.Speech.Recognition
Assembly: Microsoft.Speech (in Microsoft.Speech.dll)
Syntax
'Declaration
Public Shared Widening Operator CType ( _
choices As Choices _
) As GrammarBuilder
'Usage
Dim input As Choices
Dim output As GrammarBuilder
output = CType(input, GrammarBuilder)
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.
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";