Console::Beep Method (Int32, Int32)

Updated: April 2009

Plays the sound of a beep of a specified frequency and duration through the console speaker.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

[HostProtectionAttribute(SecurityAction::LinkDemand, UI = true)]
public:
static void Beep(
	int frequency, 
	int duration
)

Parameters

frequency
Type: System::Int32

The frequency of the beep, ranging from 37 to 32767 hertz.

duration
Type: System::Int32

The duration of the beep measured in milliseconds.

ExceptionCondition
ArgumentOutOfRangeException

frequency is less than 37 or more than 32767 hertz.

-or-

duration is less than or equal to zero.

HostProtectionException

This method was executed on a server, such as SQL Server, that does not permit access to the console.

NoteNote:

The HostProtectionAttribute attribute applied to this type or member has the following Resources property value: UI. The HostProtectionAttribute does not affect desktop applications (which are typically started by double-clicking an icon, typing a command, or entering a URL in a browser). For more information, see the HostProtectionAttribute class or SQL Server Programming and Host Protection Attributes.

NoteNote:

   The Beep method is not supported on the 64-bit editions of Windows Vista and Windows XP.

Windows 95, Windows 98, Windows 98 Second Edition, Windows Millennium Edition Platform Note: The frequency and duration parameters are ignored for these operating systems.

This example demonstrates the Beep method by playing the first few notes of a song through the console speaker.

// This example demonstrates the Console.Beep(Int32, Int32) method 
using namespace System;
using namespace System::Threading;
ref class Sample
{
protected:

   // Define the frequencies of notes in an octave, as well as  
   // silence (rest). 
   enum class Tone
   {
      REST = 0,
      GbelowC = 196,
      A = 220,
      Asharp = 233,
      B = 247,
      C = 262,
      Csharp = 277,
      D = 294,
      Dsharp = 311,
      E = 330,
      F = 349,
      Fsharp = 370,
      G = 392,
      Gsharp = 415
   };


   // Define the duration of a note in units of milliseconds. 
   enum class Duration
   {
      WHOLE = 1600,
      HALF = Duration::WHOLE / 2,
      QUARTER = Duration::HALF / 2,
      EIGHTH = Duration::QUARTER / 2,
      SIXTEENTH = Duration::EIGHTH / 2
   };


public:

   // Define a note as a frequency (tone) and the amount of  
   // time (duration) the note plays. 
   value struct Note
   {
   public:
      Tone toneVal;
      Duration durVal;

      // Define a constructor to create a specific note.
      Note( Tone frequency, Duration time )
      {
         toneVal = frequency;
         durVal = time;
      }


      property Tone NoteTone 
      {

         // Define properties to return the note's tone and duration.
         Tone get()
         {
            return toneVal;
         }

      }

      property Duration NoteDuration 
      {
         Duration get()
         {
            return durVal;
         }

      }

   };


protected:

   // Play the notes in a song. 
   static void Play( array<Note>^ tune )
   {
      System::Collections::IEnumerator^ myEnum = tune->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Note n =  *safe_cast<Note ^>(myEnum->Current);
         if ( n.NoteTone == Tone::REST )
                  Thread::Sleep( (int)n.NoteDuration );
         else
                  Console::Beep( (int)n.NoteTone, (int)n.NoteDuration );
      }
   }


public:
   static void Main()
   {

      // Declare the first few notes of the song, "Mary Had A Little Lamb".
      array<Note>^ Mary = {Note( Tone::B, Duration::QUARTER ),Note( Tone::A, Duration::QUARTER ),Note( Tone::GbelowC, Duration::QUARTER ),Note( Tone::A, Duration::QUARTER ),Note( Tone::B, Duration::QUARTER ),Note( Tone::B, Duration::QUARTER ),Note( Tone::B, Duration::HALF ),Note( Tone::A, Duration::QUARTER ),Note( Tone::A, Duration::QUARTER ),Note( Tone::A, Duration::HALF ),Note( Tone::B, Duration::QUARTER ),Note( Tone::D, Duration::QUARTER ),Note( Tone::D, Duration::HALF )};

      // Play the song
      Play( Mary );
   }

};

int main()
{
   Sample::Main();
}

/*
This example produces the following results:

This example plays the first few notes of "Mary Had A Little Lamb" 
through the console speaker.
*/

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

Date

History

Reason

April 2009

Added platform information.

Content bug fix.

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