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Articles / Web Development / ASP.NET
Posted 24 Jun 2002


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Dynamic Webcam Image

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4.65/5 (19 votes)
24 Jun 20021 min read
Streaming Dynamic Images from your webcam into your web pages.



This project presents the way to dynamically generate a picture with C# and ASP.NET. Basically a browser points to your page and gets back a picture grabbed on your webcam.

You will be able to access your webcam by placing a HTML IMG tag on your webpage. The picture at the top is an example of usage.

To be able to use the webcam you need to register with regsvr32 the COM Dll CamServer.dll in the 'COM Component' directory.


The first thing to do to get a picture from an ASP.NET page is to determine the MIME file type that the file will handle. In our case the MIME type is JPEG. So we define in the ContentType of the Page:

<%@ Page Language="c#" ContentType="image/jpeg" %>
We also need to specify at the top of the page the namespace that will be used:
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Drawing2D" %>
<%@ Import Namespace="System.Drawing.Imaging" %>
<%@ Import Namespace="System.Net" %>
Then comes the code that will grab the image from the wbecam and returns it to the client:
<script language="C#" runat="server">

protected void Page_Load(object sender, EventArgs e)
    //Jpeg compression quality
    short nQuality = 45;

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

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

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

    Graphics g = Graphics.FromImage( bmp );

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

	StringFormat drawFormat = new StringFormat();
    drawFormat.Alignment = StringAlignment.Center;

    g.DrawString(   strDate,
                    new Font( FontFamily.GenericSansSerif, 12 ),
                    new SolidBrush( Color.Black ), 
                    new RectangleF( 1,1,320,240 ),

    g.DrawString(   strDate,
                    new Font( FontFamily.GenericSansSerif, 12 ),
                    new SolidBrush( Color.White ), 
                    new RectangleF( 0,0,320,240 ),

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

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

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

    bmp.Save( Response.OutputStream, icf[1], encps );
In the code there is nothing new, compared to the other articles. We get a jpeg picture grabbed by the webcam using COM Interop. We add the hour and the little difference is that the image stream is saved to Response.OutputStream .


You may reference the ASP.NET page has a normal jpeg picture:

<img src="http://XXX/WebcamPicture/WebForm1.aspx" width="320" height="240"/>
or in a ASP:Image control.


This opens lots of possibilities in the creation of dynamic graphics. For example you may create dynamic charts linked to database values returned has a normal graphic in a presentation page. You may also make easily a visit counter for your pages...

Known Issues

  • None.


Version 1.00 June 14, 2002
First release.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


About the Author

Laurent Kempé
Team Leader
France France
I am an experienced Team Leader & Senior Solutions Architect with a passion for shipping high-quality products by empowering development team and culture toward an agile mindset. I bring technical vision and strategy, leading engineering teams to move product, processes and architecture forward.

Comments and Discussions

QuestionHard code default webcam possible? Pin
Aakshay Subu2-Apr-14 19:08
MemberAakshay Subu2-Apr-14 19:08 
Questionun error Pin
tobias0227-Aug-13 17:39
Membertobias0227-Aug-13 17:39 
QuestionCapture Image from Web Cam application Pin
Member 991393816-May-13 20:30
MemberMember 991393816-May-13 20:30 
QuestionRe: Capture Image from Web Cam application Pin
manipriya6219-Jul-13 23:27
Membermanipriya6219-Jul-13 23:27 
QuestionError Pin
Ashish Rathod14-Dec-12 23:22
MemberAshish Rathod14-Dec-12 23:22 
QuestionI need codes about how to cotrol camera Pin
xianzhi yin2-May-12 15:04
Memberxianzhi yin2-May-12 15:04 
QuestionRequest for IP camera C++ code Pin
Winson_19894-Apr-12 21:53
MemberWinson_19894-Apr-12 21:53 
GeneralMy vote of 1 Pin
G RAGHUVEER28-Feb-12 22:56
MemberG RAGHUVEER28-Feb-12 22:56 
QuestionOnly Date and Black Screen Pin
Hewbert Gabon23-Jan-12 6:16
MemberHewbert Gabon23-Jan-12 6:16 
AnswerRe: Only Date and Black Screen Pin
Member 86139702-Feb-12 5:16
MemberMember 86139702-Feb-12 5:16 
QuestionRe: Retrieving the COM class factory for component with CLSID {D6BA1539-8473-497C-92C3-8ECF63DAC0F3} failed due to the following error: 80040154 Pin
puneetisonfire8917-Oct-11 23:17
Memberpuneetisonfire8917-Oct-11 23:17 
AnswerRe: Retrieving the COM class factory for component with CLSID {D6BA1539-8473-497C-92C3-8ECF63DAC0F3} failed due to the following error: 80040154 Pin
Raghava jogu2-Apr-12 21:58
MemberRaghava jogu2-Apr-12 21:58 
just open run command and write regsvr32 and drag dll .
GeneralRe: Retrieving the COM class factory for component with CLSID {D6BA1539-8473-497C-92C3-8ECF63DAC0F3} failed due to the following error: 80040154 Pin
NwCaos22-Apr-13 7:16
MemberNwCaos22-Apr-13 7:16 
Questionyour project is error ridden and not working Pin
international ninja28-Sep-11 7:59
Memberinternational ninja28-Sep-11 7:59 
Questionimage capturing only from my system web cam if i upload the code in server Pin
rajender3813-Sep-11 0:47
Memberrajender3813-Sep-11 0:47 
GeneralUnable to add reference file CamServer.dll Pin
56456kj4-Jun-11 10:36
Member56456kj4-Jun-11 10:36 
GeneralProblem to register Pin
Unknown Ajanabi20-Jan-11 21:14
MemberUnknown Ajanabi20-Jan-11 21:14 
GeneralRe: Problem to register Pin
Member 794624722-May-11 23:57
MemberMember 794624722-May-11 23:57 
GeneralMy vote of 5 Pin
Joe Sonderegger14-Jan-11 1:58
MemberJoe Sonderegger14-Jan-11 1:58 
GeneralVirus Found Pin
scienty775-Jan-10 21:59
Memberscienty775-Jan-10 21:59 
GeneralRe: Virus Found Pin
Laurent Kempé5-Jan-10 22:19
MemberLaurent Kempé5-Jan-10 22:19 
GeneralBlank Image Show Pin
piyush.sabla@e-connectsolutions.com28-Nov-09 0:34
Memberpiyush.sabla@e-connectsolutions.com28-Nov-09 0:34 
GeneralRe: Blank Image Show Pin
puneetisonfire8917-Oct-11 20:27
Memberpuneetisonfire8917-Oct-11 20:27 
GeneralRetrieving the COM class factory for component with CLSID {D6BA1539-8473-497C-92C3-8ECF63DAC0F3} failed due to the following error: 80040154 Pin
ajau.jain23-Nov-09 2:38
Memberajau.jain23-Nov-09 2:38 
GeneralRe: Retrieving the COM class factory for component with CLSID {D6BA1539-8473-497C-92C3-8ECF63DAC0F3} failed due to the following error: 80040154 Pin
puneetisonfire8917-Oct-11 20:00
Memberpuneetisonfire8917-Oct-11 20:00 

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