SpeechRecognitionEngine.SetInputToWaveFile(String) SpeechRecognitionEngine.SetInputToWaveFile(String) SpeechRecognitionEngine.SetInputToWaveFile(String) SpeechRecognitionEngine.SetInputToWaveFile(String) Method

Definition

Configures the SpeechRecognitionEngine object to receive input from a Waveform audio format (.wav) file.

public:
 void SetInputToWaveFile(System::String ^ path);
public void SetInputToWaveFile (string path);
member this.SetInputToWaveFile : string -> unit
Public Sub SetInputToWaveFile (path As String)

Parameters

path
String String String String

The path of the file to use as input.

Examples

The following example performs recognition on the audio in a .wav file and writes the recognized text to the console.

using System;  
using System.IO;  
using System.Speech.Recognition;  
using System.Speech.AudioFormat;  

namespace SampleRecognition  
{  
  class Program  
  {  
    static bool completed;  

    static void Main(string[] args)  

    // Initialize an in-process speech recognition engine.  
    {  
      using (SpeechRecognitionEngine recognizer =  
         new SpeechRecognitionEngine())  
      {  

        // Create and load a grammar.  
        Grammar dictation = new DictationGrammar();  
        dictation.Name = "Dictation Grammar";  

        recognizer.LoadGrammar(dictation);  

        // Configure the input to the recognizer.  
recognizer.SetInputToWaveFile(@"c:\temp\SampleWAVInput.wav");  

        // Attach event handlers for the results of recognition.  
        recognizer.SpeechRecognized +=   
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);  
        recognizer.RecognizeCompleted +=   
          new EventHandler<RecognizeCompletedEventArgs>(recognizer_RecognizeCompleted);  

        // Perform recognition on the entire file.  
        Console.WriteLine("Starting asynchronous recognition...");  
        completed = false;  
        recognizer.RecognizeAsync();  

        // Keep the console window open.  
        while (!completed)  
        {  
          Console.ReadLine();  
        }  
        Console.WriteLine("Done.");  
      }  

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

    // Handle the SpeechRecognized event.  
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)  
    {  
      if (e.Result != null && e.Result.Text != null)  
      {  
        Console.WriteLine("  Recognized text =  {0}", e.Result.Text);  
      }  
      else  
      {  
        Console.WriteLine("  Recognized text not available.");  
      }  
    }  

    // Handle the RecognizeCompleted event.  
    static void recognizer_RecognizeCompleted(object sender, RecognizeCompletedEventArgs e)  
    {  
      if (e.Error != null)  
      {  
        Console.WriteLine("  Error encountered, {0}: {1}",  
        e.Error.GetType().Name, e.Error.Message);  
      }  
      if (e.Cancelled)  
      {  
        Console.WriteLine("  Operation cancelled.");  
      }  
      if (e.InputStreamEnded)  
      {  
        Console.WriteLine("  End of stream encountered.");  
      }  
      completed = true;  
    }  
  }  
}  

Remarks

If the recognizer reaches the end of the input file during a recognition operation, the recognition operation finalizes with the available input. Any subsequent recognition operations can generate an exception, unless you update the input to the recognizer.

Applies to

See also