Choices.Add Method (String[])

Adds an array containing one or more String objects to the set of alternatives.

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

public void Add(
	params string[] phrases


Type: []
The strings to add to this Choices object.

Applications can use both Add([]) and Add([]) to add alternatives to a Choices object.

If phrases is an empty array, this method does not update the set of alternates.

This method throws an ArgumentNullException when phrases is a null reference (Nothing in Visual Basic) or any of the array elements are a null reference (Nothing in Visual Basic). This method throws an ArgumentException if any element in the array is the empty string ("").

The following example creates a speech recognition grammar for phrases similar to "Call Anne on her cell" and "Call James on his work phone". The example uses both overloads of the Add method to build the grammar.

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(new GrammarBuilder("phone"), 0, 1);

  return new Grammar(gb);