Typical asp.net image watermark code

Asp tutorial. net Image watermark Classic code

To prevent the image from being reprinted and used by others, we will process the image watermark.

<% @ WebHandler Language = "C #" Class = "BookHandler" %>

Using System;

Using System. Web;

Using System. Drawing;

Using System. IO;

 

Public class BookHandler: IHttpHandler {

Private const string COVERSADDR = "~ /Image/"; // cover folder path

Private const string WATERMARK_URL = "~ /Images/WaterMark.jpg "; // digital watermark path

Private const string DEFAULT_URL = "~ /Images/default.jpg "; // Default image path

  

Public void ProcessRequest (HttpContext context ){

String path = context. Request. MapPath (COVERSADDR + context. Request. Params ["ISBN"]. ToString () + ". jpg ");

Image Cover;

If (File. Exists (path ))

        {

Cover = Image. FromFile (path );

Image watermark = Image. FromFile (context. Request. MapPath (WATERMARK_URL ));

Graphics g = Graphics. FromImage (Cover );

G. drawImage (watermark, new Rectangle (Cover. width-watermark. width, Cover. height-watermark. height, watermark. width, watermark. height), 0, 0, watermark. width, watermark. height, GraphicsUnit. pixel );

G. Dispose ();

Watermark. Dispose ();

        }

Else

        {

Cover = Image. FromFile (context. Request. MapPath (DEFAULT_URL ));

        }

 

Context. Request. ContentType = "image/ipeg ";

Cover. Save (context. Response. OutputStream, System. Drawing. Imaging. ImageFormat. Jpeg );

Cover. Dispose ();

Context. Response. End ();

    }

 

Public bool IsReusable {

Get {

Return false;

        }

    }

 

}

Finally, change the path of the connected Image

BookCover. ashx? ISBN = number.