asp.net generic handler (.ashx page) and session

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C#

ASP.NET

can i get session in generic handler(.ashx page)

please answer me

Posted 3-Feb-11 19:45pm

sabithaOrell

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shakil0304003 4-Feb-11 1:51am

Use google 1st!!! http://www.google.com/search?hl=en&client=opera&hs=6Wv&rls=en&channel=suggest&q=session+in+generic+handler+in+c%23&aq=f&aqi=&aql=&oq=

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gitcue · Answer 1 · 2012-04-30T18:36:00

Hey you can set/get Session as below, n if SessionState object not exist you first need to add it. Dis code not required any other configuration. This demo i used to store CAPTHCA in session.

C#

using System;
using System.Web;
using System.Drawing;
using System.Web.SessionState;

public class captcha : IHttpHandler, IRequiresSessionState
{

   
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "image/jpeg";
        CatpchaImage captcha = new CatpchaImage();
        string str = captcha.DrawNumbers(5);
        if (context.Session[ CatpchaImage.SESSION_CAPTCHA] == null) context.Session.Add(CatpchaImage.SESSION_CAPTCHA, str);
        else
        {
            context.Session[ CatpchaImage.SESSION_CAPTCHA] = str;
        }
        Bitmap bmp = captcha.Result;
        bmp.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
    }
 
    
    
    public bool IsReusable {
        get {
            return true;
        }
    }

}

sabithaOrell · Answer 2 · 2011-02-03T20:39:00

Solution 3

but in the generic handler 'HttpContext.Current.Session' is always null
why this?

Posted 3-Feb-11 20:39pm

sabithaOrell

shakil0304003 · Answer 3 · 2011-02-03T19:48:00

Solution 1

Yes, you will get the session in handler.

HttpContext.Current.Session

Posted 3-Feb-11 19:48pm

shakil0304003

Updated 3-Feb-11 19:50pm

v2

Comments

OriginalGriff 4-Feb-11 2:39am

The OP wrote:
"can you say how i didnt getting now"

MUGUNDAN MADHAVAN · Answer 4 · 2011-02-04T00:10:00

Check your web.config, whether .ashx reference is added under <httphandlers>...
ie
<add verb="*" path="*.ashx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">

Then try using
context.session["sample"] = "";

It will allow to add/handle session.

if not add sessionstate namespace along with the above mentioned code.

Gelu Vac · Answer 5 · 2011-06-09T07:58:00

Handlers are the lightest objects to operate Request/Response, so it will only reference/load as much data as you describe for it ...

For this specific case, all you need to do is implement the IRequireSessionState in the handler.

As the example right here:

public class Handler : IHttpHandler, System.Web.SessionState.IRequiresSessionState

Cheers.

Ahsan Murshed · Answer 6 · 2012-11-25T19:01:00

Use IReadOnlySessionState if you only need to read values from Session.
Use IRequireSessionState if you need to store values in Session or full access to session.

Example: IReadOnlySessionState

C#

using System;
using System.Web;
using System.Web.SessionState;

public class DownloadHandler : IHttpHandler, IReadOnlySessionState
{
   public bool IsReusable { get { return true; } }

   public void ProcessRequest(HttpContext ctx)
   {
       ctx.Response.Write(ctx.Session["fred"]);
   }
}

Sunasara Imdadhusen · Answer 7 · 2011-02-03T20:42:00

Hi Sabitha,

You can use session in .ashx page. Please check following example:

You can use:

C#

string UserName = Convert.ToString(HttpContext.Current.Session["UserName"]);

Full Example:

C#

public class Handler : IHttpHandler {
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";
        context.Response.Write("Hello World");
        string UserName = Convert.ToString(HttpContext.Current.Session["UserName"]);
    }
    public bool IsReusable {
        get {
            return false;
        }
    }
}

Thanks,
Imdadhusen

spkichara · Answer 8 · 2012-08-04T01:54:00

Solution 8

yes....

C#

public class Handler : IHttpHandler, System.Web.SessionState.IRequiresSessionState
{

    public void ProcessRequest(HttpContext context)
    {

       
        string User = context.Session["Uname"].ToString();
        context.Response.Write(User );
    }
}

Posted 4-Aug-12 1:54am

spkichara

asp.net generic handler (.ashx page) and session

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