SemanticResultKey.ToGrammarBuilder 方法

public:
 System::Speech::Recognition::GrammarBuilder ^ ToGrammarBuilder();

public System.Speech.Recognition.GrammarBuilder ToGrammarBuilder();

member this.ToGrammarBuilder : unit -> System.Speech.Recognition.GrammarBuilder

Public Function ToGrammarBuilder () As GrammarBuilder

返回

从当前GrammarBuilder实例构造的SemanticResultKey实例。

示例

以下示例创建一个 Grammar 对象，该对象支持用于更改背景色的命令。

使用Choices实例的方法填充colorChoiceAdd(GrammarBuilder[])包含背景色选项列表的对象（GrammarBuilder）。 这些 GrammarBuilder 实例通过 ToGrammarBuilder() 从颜色字符串创建的对象上 SemanticResultValue 的方法获取。

然后，通过调用GrammarBuilderToGrammarBuilder()实例来获取 ASemanticResultKey，该实例将用于键式选择。colorChoice

private Grammar CreateGrammarBuilderRGBSemantics()
{

  // Create a set of choices, each a lookup from a color name to RGB.
  // Choices constructors do not take SemanticResultValue parameters, so cast
  // the SemanticResultValue to GrammarBuilder.
  Choices colorChoice = new Choices();
  foreach (string colorName in System.Enum.GetNames(typeof(KnownColor)))
  {
    SemanticResultValue colorValue=new SemanticResultValue(colorName, Color.FromName(colorName).ToArgb());

    // Use implicit conversion of SemanticResultValue to GrammarBuilder.
    colorChoice.Add(colorValue.ToGrammarBuilder());
  }
  SemanticResultKey choiceKey = new SemanticResultKey("rgb", colorChoice);
  GrammarBuilder choiceBuilder = choiceKey.ToGrammarBuilder();

  // Create two intermediate grammars with introductory phrase and the color choice.
  GrammarBuilder makeBackgroundBuilder = "Make background";
  makeBackgroundBuilder.Append(choiceBuilder);

  GrammarBuilder configureBackgroundBuilder = new GrammarBuilder("Configure background as");
  configureBackgroundBuilder.Append((new SemanticResultKey("rgb", colorChoice)).ToGrammarBuilder());

  // Create the Grammar object, which recognizes either intermediate grammar.
  Grammar grammar = new Grammar(new Choices(new GrammarBuilder[] {makeBackgroundBuilder, configureBackgroundBuilder}));
  grammar.Name = "Make Background /Configure background as";

  return grammar;
}

注解

其ToGrammarBuilder用法等效于使用采用参数 （） 的GrammarBuilder构造函数SemanticResultKey。GrammarBuilder(SemanticResultKey)