通过

SpeechRecognitionEngine.UnloadAllGrammars 方法

  • 参考

定义

命名空间:
System.Speech.Recognition
程序集:
System.Speech.dll
包:
System.Speech v8.0.0
包:
System.Speech v9.0.0-rc.2.24473.5
Source:
SpeechRecognitionEngine.cs
Source:
SpeechRecognitionEngine.cs
Source:
SpeechRecognitionEngine.cs

从卸载识别器的所有 Grammar 对象。

public:
 void UnloadAllGrammars();
public void UnloadAllGrammars ();
member this.UnloadAllGrammars : unit -> unit
Public Sub UnloadAllGrammars ()

示例

以下示例演示了控制台应用程序的一部分，该应用程序演示了语音识别语法的同步加载和卸载。

Loading grammars...  
Loaded grammars:  
 - Grammar1  
 - Grammar2  
 - Grammar3  

Unloading Grammar1...  
Loaded grammars:  
 - Grammar2  
 - Grammar3  

Unloading all grammars...  
No grammars loaded.  

Press any key to exit...  

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

namespace UnloadGrammars  
{  
  class Program  
  {  
    static void Main(string[] args)  
    {  
      using (SpeechRecognitionEngine recognizer =  
        new SpeechRecognitionEngine(new CultureInfo("en-US")))  
      {  
        Console.WriteLine("Loading grammars...");  

        // Create and load a number of grammars.  
        Grammar grammar1 = new Grammar(new GrammarBuilder("first grammar"));  
        grammar1.Name = "Grammar1";  
        recognizer.LoadGrammar(grammar1);  

        Grammar grammar2 = new Grammar(new GrammarBuilder("second grammar"));  
        grammar2.Name = "Grammar2";  
        recognizer.LoadGrammar(grammar2);  

        Grammar grammar3 = new Grammar(new GrammarBuilder("third grammar"));  
        grammar3.Name = "Grammar3";  
        recognizer.LoadGrammar(grammar3);  

        // List the recognizer's loaded grammars.  
        ListGrammars(recognizer);  

        // Unload one grammar and list the loaded grammars.  
        Console.WriteLine("Unloading Grammar1...");  
        recognizer.UnloadGrammar(grammar1);  
        ListGrammars(recognizer);  

        // Unload all grammars and list the loaded grammars.  
        Console.WriteLine("Unloading all grammars...");  
        recognizer.UnloadAllGrammars();  
        ListGrammars(recognizer);  
      }  

      Console.WriteLine("Press any key to exit...");  
      Console.ReadKey();  
    }  

    private static void ListGrammars(SpeechRecognitionEngine recognizer)  
    {  
      // Make a copy of the recognizer's grammar collection.  
      List<Grammar> loadedGrammars = new List<Grammar>(recognizer.Grammars);  

      if (loadedGrammars.Count > 0)  
      {  
        Console.WriteLine("Loaded grammars:");  
        foreach (Grammar g in recognizer.Grammars)  
        {  
          Console.WriteLine(" - {0}", g.Name);  
        }  
      }  
      else  
      {  
        Console.WriteLine("No grammars loaded.");  
      }  
      Console.WriteLine();  
    }  
  }  
}

注解

如果识别器当前正在异步加载 ，Grammar则此方法将等到 Grammar 加载，然后才能从SpeechRecognitionEngine实例中卸载所有Grammar对象。

若要卸载特定语法，请使用 UnloadGrammar 方法。

适用于

另请参阅