Initializes a new instance of the Choices class that contains an empty set of alternatives.
Namespace:
Microsoft.Speech.Recognition
Assembly:
Microsoft.Speech (in Microsoft.Speech.dll)
Syntax
| Visual Basic (Declaration) |
|---|
Public Sub New |
| Visual Basic (Usage) |
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Dim instance As New Choices() |
| C# |
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public Choices() |
Remarks
This constructor returns a valid, empty set of alternatives. You can add alternatives using any of the Add methods.
Examples
The following example uses Choices and GrammarBuilder objects to create a phrase that can be used to recognize speech input such as "Call Anne on her cell" and "Call James on his work phone". The example uses implicit casts from Choices and String to GrammarBuilder.
| Copy Code | |
|---|---|
public Grammar CreatePhonePhrase()
{
// Create alternatives for female names and add a phrase.
GrammarBuilder females = new Choices(new string[] { "Anne", "Mary" });
females.Append("on her");
// Create alternatives for male names and add a phrase.
GrammarBuilder males = new Choices(new string[] { "James", "Sam" });
males.Append("on his");
// Create a Choices object that contains an array of alternative
// GrammarBuilder objects.
Choices people = new Choices();
people.Add(new Choices(new GrammarBuilder[] {females, males}));
// Create a Choices object that contains a set of alternative phone types.
Choices phoneType = new Choices();
phoneType.Add(new string[] { "cell", "home", "work" });
// Construct the phrase.
GrammarBuilder gb = new GrammarBuilder();
gb.Append("call");
gb.Append(people);
gb.Append(phoneType);
gb.Append(new GrammarBuilder("phone"), 0, 1);
return new Grammar(gb);
} | |
See Also
