Create a class instance on Application_Start

Question

Is it possible to create a class instance on Application_Start that can be used in all controllers?

I would like to be able to create for example:

var globalHelper = new LoadsStuff();

and then in my Action methods:

globalHelper.GetInfoFor("key");

My Helper class loads a fairly big XML file to memory and I would like to do that only once.

Are you using MVC? If you are, you should indicate that in your tags. — DOK
– DOK, Commented Jun 1, 2011 at 13:41
I did but a admin change the tags to asp.net, I just fixed :) — Bjarki Heiðar
– Bjarki Heiðar, Commented Jun 1, 2011 at 13:42
this sound suspiciously like you want to use dependency injection. have a look at ninject mvc weblogs.asp.net/shijuvarghese/archive/2010/04/30/… — Pieter Germishuys
– Pieter Germishuys, Commented Jun 1, 2011 at 13:44

Akram Shahda · Accepted Answer · 2011-06-01 13:55:16Z

4

Use application variables:

Application["GlobalHelper"] = new LoadsStuff();

((LoadsStuff) Application["GlobalHelper"]).GetInfoFor("key");

Refer to:

ASP.NET Application State Overview

edited Jun 1, 2011 at 13:55

answered Jun 1, 2011 at 13:43

Akram Shahda

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3 Comments

Bjarki Heiðar Over a year ago

The Application is not available in the controller, are you sure this is correct?

Akram Shahda Over a year ago

@Bjarki Heiðar: Try HttpContext.Current.Application.

Bjarki Heiðar Over a year ago

It's HttpContext.Application, Thank you.

Muhammad Akhtar · Accepted Answer · 2011-06-01 13:41:39Z

1

What if you put your XML file Application level object in Application_Start event ?

void Application_Start(object sender, EventArgs e)
{
     Application[""] = //
}

answered Jun 1, 2011 at 13:41

Muhammad Akhtar

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Comments

Eystein Bye · Accepted Answer · 2011-06-01 13:43:09Z

0

Yes I think you can. I have not tried this, but something like:

ManagedWebSessionContext.Bind(HttpContext.Current, globalHelper)

answered Jun 1, 2011 at 13:43

Eystein Bye

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