How to set Application State value within a class?

Question

In the App_Code folder, I created a new class in which I wanted to set the value of an Application State variable.

In order to read from Application State, I used the following code:

string text = (string)HttpContext.Current.Application["text"];

But now I want to set the value of the Application State. I had tried the following code, but it didn't work:

System.Web.HttpApplicationState.Application["text"] = "string";

What's the right way to set the value of an Application State variable?

Visual Studio underlined "Application" in red, and said: "'System.Web.HttpApplicationState' does not contain a definition for 'Application'" — Ido, Feb 15 '14 at 12:56
if I got your question correctly, why don't you use the same method of reading when you want to write? `HttpContext.Current.Session["text"] = YOUR_VALUE;` — Mohammed Swillam, Feb 15 '14 at 12:58
From what I've read this method is for reading only. Are you sure it'll work? Visual Studio seems to accept it. — Ido, Feb 15 '14 at 13:01
@MohammedElSayed mentioned the correct thing , you should be using either of the two for read and write. — Ram Mehta, Feb 15 '14 at 13:02

score 2 · Answer 1 · answered Feb 15 '14 at 12:59

2

Use this:

HttpContext.Current.Application["text"] = "string";

When you are setting the value in code behind file of a page, you can simply use:

Application["text"]="string";

answered Feb 15 '14 at 12:59

Amit Joki

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score 1 · Answer 2 · answered Feb 15 '14 at 13:07

1

Can you please use in the following manner ?

To write the Application State as :

System.Web.HttpApplicationState.Application["text"] = "string";

And read them as

string text = (string)Application["text"];

Try this .

answered Feb 15 '14 at 13:07

Ram Mehta

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score 1 · Answer 3 · answered Feb 15 '14 at 13:12

the technique to read/write application/session variables from outside your page code (say a class file) is the same, you must explicitly point to the current HTTP Context before moving forward.

as an example so to read any application variable, use the following line:

var myVariable = HttpContext.Current.Application["PROPERTY_NAME"]

and to write back a value, use the following line

HttpContext.Current.Application["PROPERTY_NAME"] = YOUR_VALUE

the same thing applies to Session variables.

P.S: I'm the one who suggested this first, see my comment above. :)

How to set Application State value within a class?

3 Answers3