C# cheat sheet

how-do-i-generate-a-random-int-number

Random rnd = new Random();
int month = rnd.Next(1, 13);  // month: >= 1 and < 13

chart library

• https://www.codeproject.com/Articles/5431/A-flexible-charting-library-for-NET
• http://zedgraph.sourceforge.net/samples.html

WindowsMediaPlayer pause

AxWindowsMediaPlayer1.Ctlcontrols.pause()

implement-keyboard-shortcuts-in-a-windows-forms-application

protected override bool ProcessCmdKey(ref Message msg, Keys keyData) {
  if (keyData == (Keys.Control | Keys.F)) {
    MessageBox.Show("What the Ctrl+F?");
    return true;
  }
  return base.ProcessCmdKey(ref msg, keyData);
}

play-video-files

// [ C# ]
WMPLib.WindowsMediaPlayer Player;

private void PlayFile(String url)
{
    Player = new WMPLib.WindowsMediaPlayer();
    Player.PlayStateChange +=
        new WMPLib._WMPOCXEvents_PlayStateChangeEventHandler(Player_PlayStateChange);
    Player.MediaError +=
        new WMPLib._WMPOCXEvents_MediaErrorEventHandler(Player_MediaError);
    Player.URL = url;
    Player.controls.play();
}

private void Form1_Load(object sender, System.EventArgs e)
{
    // TODO  Insert a valid path in the line below.
    PlayFile(@"c:\myaudio.wma");
}

private void Player_PlayStateChange(int NewState)
{
    if ((WMPLib.WMPPlayState)NewState == WMPLib.WMPPlayState.wmppsStopped)
    {
        this.Close();
    }
}

private void Player_MediaError(object pMediaObject)
{
    MessageBox.Show("Cannot play media file.");
    this.Close();
}
//http://msdn.microsoft.com/en-us/library/dd564582(VS.85).aspx
//https://www.codeproject.com/Articles/844451/Audio-and-Video-Player-Csharp-Winform