Accessing session Value in Http Handlers and from Http Handlers

In this post i will explain how to access session Value in Http Handlers and from session value from Http Handlers.

In the previous post Dynamic Thumbnail Images using Http Handlers in asp.net C# explained how to show images using Http Handlers.

To access session value in Http Handler use following code

Ex :

In the code behind

         Session["imgID"] = "2";

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

using System;

using System.Web;

using System.Drawing;

using System.IO;

public class ThumbNail : IHttpHandler, System.Web.SessionState.IReadOnlySessionState

{

    public void ProcessRequest(HttpContext context)

    {      

        string imageurl = context.Session["imgID"].ToString() + ".jpg";

        string str = context.Server.MapPath("~/images/" + imageurl);

        Bitmap bmp = new Bitmap(str);

        System.Drawing.Image img = bmp.GetThumbnailImage(250, 250, null, IntPtr.Zero);

        MemoryStream ms = new MemoryStream();

        img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

        byte[] bmpBytes = ms.GetBuffer();

        img.Dispose();

        ms.Close();

        context.Response.BinaryWrite(bmpBytes);

        context.Response.End();

    }

    public bool IsReusable

    {

        get

        {

            return false;

        }

    }

}