c# - I want to retrieve an Image from database and crop it as per the user needs -

i want crop photo retrieved database, have done following retrieve image database

protected void page_load(object sender, eventargs e) {     memorystream stream = new memorystream();     sqlconnection connection = new sqlconnection(@"data source=localhost;initial catalog=card;user id=sa;password=db2admin;");     try     {         connection.open();         sqlcommand command = new sqlcommand("select photo iffcar", connection);         byte[] image = (byte[])command.executescalar();         stream.write(image, 0, image.length);         bitmap bitmap = new bitmap(stream);         response.contenttype = "image/gif";         bitmap.save(response.outputstream, imageformat.jpeg);     }     catch (exception ee)     {         connection.close();         stream.close();          httpcontext.current.response.write(ee.message);     } } 

the image retrieved displayed inside browser.

now stuck @ how crop image,i want allow user crop image retrieved database , store cropped image passed onto crystal report.

is possible? if there tutorial or guide me end requirement.please me understand how proceed query

fill in ??s , try this:

    connection.open();     sqlcommand command = new sqlcommand("select photo iffcar", connection);     byte[] image = (byte[])command.executescalar();     stream.write(image, 0, image.length);     bitmap bitmap = new bitmap(stream);      int croppedwidth = ??, croppedheight = ??, cropoffsetx = ??, cropoffsety = ??;     var croppedbitmap = new bitmap(croppedwidth, croppedheight);     var graphics = graphics.fromimage(croppedbitmap);     graphics.drawimage(bitmap, -cropoffsetx, -cropoffsety, bitmap.width, bitmap .height);     response.contenttype = "image/gif";     croppedbitmap.save(response.outputstream, imageformat.jpeg);