SpeechUI Class

SpeechUI Class

 

Provides text and status information on recognition operations to be displayed in the Speech platform user interface.

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

System.Object
  System.Speech.Recognition.SpeechUI

public class SpeechUI

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodSystem_CAPS_staticSendTextFeedback(RecognitionResult, String, Boolean)

Sends status and descriptive text to the Speech platform user interface about the status of a recognition operation.

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

The members of the SpeechUI class can be used to indicate exact feedback to the end user through the speech recognition user interface. An application can return arbitrary text and success/failure information using this class.

The following example is a handler for the SpeechRecognized event. This event is used by a Grammar that is designed to handle password input in the form "My password is …".

If a password is not present, or not valid, SendTextFeedback sends error information to the Speech platform user interface.


grammar.SpeechRecognized += 
delegate(object sender, SpeechRecognizedEventArgs eventArgs) 
{
  SemanticValue semantics = eventArgs.Result.Semantics;
  RecognitionResult result=eventArgs.Result;

  if (!semantics.ContainsKey("Password")) 
  {
    SpeechUI.SendTextFeedback(eventArgs.Result, "No Password Provided", false);
  }
  else 
  {
    RecognizedAudio pwdAudio = result.GetAudioForWordRange(
                  result.Words[3],
                  result.Words[result.Words.Count - 1]);
    MemoryStream pwdMemoryStream = new MemoryStream();
    pwdAudio.WriteToAudioStream(pwdMemoryStream);
    if (!IsValidPwd(pwdMemoryStream)) 
    {
      string badPwd = System.IO.Path.GetTempPath() + 
              "BadPwd" + (new Random()).Next().ToString() + ".wav";
      FileStream waveStream = new FileStream(badPwd, FileMode.Create);
      pwdAudio.WriteToWaveStream(waveStream);
      waveStream.Flush();
      waveStream.Close();
      SpeechUI.SendTextFeedback(eventArgs.Result, "Invalid Password", false);
    }
  }
};

.NET Framework
Available since 3.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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