default.aspx.cs

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using System;
using System.Data;
using System.Configuration;
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;
using System.Drawing.Drawing2D;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Bitmap bitmap = new Bitmap(400, 150);
        Graphics g = Graphics.FromImage(bitmap);
        g.Clear(Color.WhiteSmoke);
        Bitmap bit = new Bitmap(Server.MapPath("image.gif"));
        Rectangle rectangle1 = new Rectangle(10, 20, 80, 60);
        Rectangle rectangle2 = new Rectangle(120, 20, 100, 80);
        Rectangle rectangle3 = new Rectangle(250, 20, 120, 100);
        g.DrawImage(bit, rectangle1);
        g.DrawImage(bit, rectangle2);
        g.DrawImage(bit, rectangle3);
        System.IO.MemoryStream ms = new System.IO.MemoryStream();
        bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
        Response.ClearContent();
        Response.ContentType = "image/Gif";
        Response.BinaryWrite(ms.ToArray());
    }
}