RecognizerUpdateReachedEventArgs.UserToken Egenskap

public:
 property System::Object ^ UserToken { System::Object ^ get(); };

public object? UserToken { get; }

public object UserToken { get; }

member this.UserToken : obj

Public ReadOnly Property UserToken As Object

Egenskapsvärde

Returnerar ett objekt som innehåller UserToken.

Exempel

I följande exempel visas ett konsolprogram som läser in och tar bort Grammar objekt. Programmet använder RequestRecognizerUpdate metoden för att begära att taligenkänningsmotorn pausas så att den kan ta emot en uppdatering. Metoden skickar in ett String objekt för parametern userToken som beskriver vad programmet kommer att känna igen efter uppdateringen. Programmet läser sedan in eller tar bort ett Grammar objekt.

Vid varje uppdatering skriver en hanterare för SpeechRecognitionEngine.RecognizerUpdateReached händelsen innehållet userToken i konsolen. När grammatiker läses in och lossas känner programmet först igen namnen på husdjur, sedan namnen på husdjur och namnen på frukter, sedan bara namnen på frukter.

using System;
using System.Speech.Recognition;
using System.Collections.Generic;
using System.Threading;

namespace SampleRecognition
{
  class Program
  {
    private static SpeechRecognitionEngine recognizer;
    public static void Main(string[] args)
    {

      // Initialize an in-process speech recognition engine and configure its input.
      using (recognizer = new SpeechRecognitionEngine(
        new System.Globalization.CultureInfo("en-US")))
      {
        recognizer.SetInputToDefaultAudioDevice();

        // Create the first grammar - Farm.
        Choices animals = new Choices(new string[] { "cow", "pig", "goat" });
        GrammarBuilder farm = new GrammarBuilder(animals);
        Grammar farmAnimals = new Grammar(farm);
        farmAnimals.Name = "Farm";

        // Create the second grammar - Fruit.
        Choices fruit = new Choices(new string[] { "apples", "peaches", "oranges" });
        GrammarBuilder favorite = new GrammarBuilder(fruit);
        Grammar favoriteFruit = new Grammar(favorite);
        favoriteFruit.Name = "Fruit";

        // Attach event handlers.
        recognizer.SpeechRecognized +=
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
        recognizer.RecognizerUpdateReached +=
          new EventHandler<RecognizerUpdateReachedEventArgs>(recognizer_RecognizerUpdateReached);
        recognizer.SpeechRecognitionRejected +=
          new EventHandler<SpeechRecognitionRejectedEventArgs>(recognizer_SpeechRecognitionRejected);

        // Load the farmAnimals grammar
        recognizer.LoadGrammar(farmAnimals);

        // Start continuous, asynchronous recognition.
        recognizer.RecognizeAsync(RecognizeMode.Multiple);
        Console.WriteLine("Starting asynchronous recognition...");
        Console.WriteLine("  Farm animals will now be recognized.");
        Thread.Sleep(7000);
        Console.WriteLine();

        // Load the Fruit grammar.
        string activeGrammars = "Farm animals and fruits will now be recognized.";
        recognizer.RequestRecognizerUpdate(activeGrammars);
        recognizer.LoadGrammarAsync(favoriteFruit);
        Console.WriteLine();
        Thread.Sleep(7000);
        Console.WriteLine();

        // Unload the Farm grammar.
        string onlyFruit = "Only fruits will now be recognized.";
        recognizer.RequestRecognizerUpdate(onlyFruit);
        recognizer.UnloadGrammar(farmAnimals);
        Thread.Sleep(7000);
      }

      // Keep the console window open.
      Console.WriteLine();
      Console.WriteLine("Press any key to exit...");
      Console.ReadKey();
    }

    // At the update, describe what the application will recognize next.
    public static void recognizer_RecognizerUpdateReached(object sender, RecognizerUpdateReachedEventArgs e)
    {
      Console.WriteLine("  Update reached: " + e.UserToken);
    }

    // Write the text of the recognized phrase to the console.
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {
      Console.WriteLine("    Speech recognized: " + e.Result.Text);
    }

    // Write a message to the console when recognition fails.
    static void recognizer_SpeechRecognitionRejected(object sender, SpeechRecognitionRejectedEventArgs e)
    {
      Console.WriteLine("    Recognition attempt failed");
    }
  }
}

Kommentarer

Ett program anger en UserToken när den begär generering av en RecognizerUpdateReached händelse genom att anropa någon av metoderna SpeechRecognitionEngine.RequestRecognizerUpdate eller SpeechRecognizer.RequestRecognizerUpdate som tar en userToken parameter.

Se även

• RecognizerUpdateReachedEventArgs
• RecognizerUpdateReached
• RecognizerUpdateReached
• RequestRecognizerUpdate()
• RequestRecognizerUpdate()