using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using System.Drawing; // dont forget to add this namespace!   ** IMPORTANT **

public partial class DevCentre_AddTxtToImg_GenerateImage : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // get the picture filename and text to display from the query string
        string filename = Request.QueryString["Filename"];
        string text = Request.QueryString["Text"];

        // place the picture and our logo into seperate in-memory bitmaps
        System.Drawing.Image picture = System.Drawing.Image.FromFile(Server.MapPath("~/DevCentre/AddTxtImgToImg/" + filename));
        System.Drawing.Image logo = System.Drawing.Image.FromFile(Server.MapPath("~/GlobalImages/webicon.ico"));
        
        // get the rectangle within which our picture and logo sit
        GraphicsUnit srcUnit = 0; // specifies the units of measure used by the RectangleF struct
        RectangleF pictureRect = picture.GetBounds(ref srcUnit);
        RectangleF logoRect = logo.GetBounds(ref srcUnit);

        // create a GDI+ graphics context for the image we intend to manipulate (in this case, "picture")
        Graphics g = Graphics.FromImage(picture);

        // now we can add the text & logo to our picture. The space set for the text will be the entire picture.
        // The location of the logo will be bottom right of the picture.
        Font font = new Font("Verdana", 12, FontStyle.Bold);
        g.DrawString(text, font, Brushes.White, pictureRect);
        g.DrawImage(logo, pictureRect.Width - logoRect.Width, pictureRect.Height - logoRect.Height);

        // render the image to the HTML output stream
        picture.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);

        // lastly dispose of the graphics context and images as they both tend to hold onto
        // unmanaged resources which may not be released immediately
        g.Dispose();
        picture.Dispose();
        logo.Dispose();
    }
}