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| GrammarBuilder ImplicitWideningImplicitImplicitImplicit Conversion (String to GrammarBuilder) |
| GrammarBuilder Class Example See Also Send Feedback |
Implicitly converts a String object to an instance of GrammarBuilder.
Namespace:
Microsoft.Speech.Recognition
Assembly:
Microsoft.Speech (in Microsoft.Speech.dll)
Syntax
| Visual Basic (Declaration) |
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Public Shared Widening Operator CType ( _ phrase As String _ ) As GrammarBuilder |
| Visual Basic (Usage) |
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Dim input As String Dim output As GrammarBuilder output = CType(input, GrammarBuilder) |
| C# |
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public static implicit operator GrammarBuilder ( string phrase ) |
Parameters
- phrase
- Type: System..::..String
Valid instance of String to be implicitly converted to a containing GrammarBuilder object.
Return Value
Type: Microsoft.Speech.Recognition..::..GrammarBuilderReturns an instance of SemanticResultValue containing the logical choice defined by the phrase argument.
Examples
The following example uses GrammarBuilder and Choices objects to construct a grammar that can recognize either of the two phrases, "Make background colorChoice" or "Set background to colorChoice".
After creating a list of acceptable values for colorChoice using a Choices object, the example initializes two GrammarBuilder objects, makePhrase and setPhrase, using implicit conversion from string objects.
The example finally creates a Grammar object from a Choices object cast to a GrammarBuilder object.
| C# | Copy Code |
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private Grammar CreateColorGrammar()
{
// Create a set of color choices.
Choices colorChoice = new Choices(new string[] {"red", "green", "blue"});
GrammarBuilder colorElement = new GrammarBuilder(colorChoice);
// Create grammar builders for the two versions of the phrase.
GrammarBuilder makePhrase = new GrammarBuilder("Make background");
makePhrase.Append(colorElement);
GrammarBuilder setPhrase = new GrammarBuilder("Set background to");
setPhrase.Append(colorElement);
// Create a Choices for the two alternative phrases, convert the Choices
// to a GrammarBuilder, and construct the Grammar object from the result.
Choices bothChoices = new Choices(new GrammarBuilder[] {makePhrase, setPhrase});
Grammar grammar = new Grammar((GrammarBuilder)bothChoices);
grammar.Name = "backgroundColor";
return grammar;
} | |
See Also
