I found this article by Laurent Kempé while searching for something to playaround with.This sample application utilizes the System.Net namespace to implement a port to C# of the C++ ATL Web Service. .NET COM Interop is used to import the said component to the C# project.

You can get read the complete information about this project on CodeProject.

A sample code is listed below.

[WebMethod]
public byte[] GrabFrame( short nQuality )
{
//Write to the EventLog the IP and Host name
string addr = HttpContext.Current.Request.UserHostAddress.Trim();

string name;

IPHostEntry host = null;

try
{
host = System.Net.Dns.GetHostByAddress( addr );

if ( host != null )
{
name = host.HostName;
for( int i = 0; i < host.Aliases.Length; i++ )
name += "*" + host.Aliases[i];

eventLog.WriteEntry( addr + " : " + name );
}
else
{
name = "ERROR";

eventLog.WriteEntry( name );
}
}
catch( System.Exception error )
{
// process the error error.Message
}

//Shoot a picture from my webcam
CAMSERVERLib.Camera cam = new CAMSERVERLib.CameraClass();

byte[] picture = (byte[])cam.GrabFrame( nQuality );

//Increments Performance Counter
performanceCounterShoot.Increment();

//Add the hour
MemoryStream ms = new MemoryStream( picture );
Bitmap bmp = new Bitmap( ms );

Graphics g = Graphics.FromImage( bmp );

string strDate = DateTime.Now.ToLongDateString() +
" - " +
DateTime.Now.ToLongTimeString();

g.DrawString( strDate,
new Font( FontFamily.GenericSansSerif, 10 ),
new SolidBrush( Color.Black ),
new RectangleF( 1,1,320,240 )
);

g.DrawString( strDate,
new Font( FontFamily.GenericSansSerif, 10 ),
new SolidBrush( Color.White ),
new RectangleF( 0,0,320,240 )
);

MemoryStream ms2 = new MemoryStream();

//Get codecs
ImageCodecInfo[] icf = ImageCodecInfo.GetImageEncoders();

EncoderParameters encps = new EncoderParameters( 1 );
EncoderParameter encp = new EncoderParameter( Encoder.Quality, (long) nQuality );

//Set quality
encps.Param[0] = encp;

bmp.Save( ms2, icf[1], encps );
ms2.Close();

return ms2.ToArray();
}