Store data in memory which can be access from all users asp.net mvc

Question

How can I store data in memory of asp.net mvc application which can be accessed by all users logged in.

that's part of the question - essentially want to store it in RAM, not DB storage. Essentially HttpContext.Current.Application variable that should be common for all users, but not sure if that's the best approach.... — Lyubomir Velchev, Jun 05 '15 at 09:49

score 1 · Accepted Answer · answered Jun 05 '15 at 11:50

1

You can use a static variable. If you have some static Constants class, just create a static list or a static variable.

public static List<string> commonList =  new List<string>

answered Jun 05 '15 at 11:50

shwetaOnStack

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Is that better approach compared to Application variables? – Lyubomir Velchev Jun 05 '15 at 15:41
according to [this](http://stackoverflow.com/questions/10960695/using-static-variables-instead-of-application-state-in-asp-net) answer, Yes. It also gives reference to Microsoft support link which explains it. – shwetaOnStack Jun 06 '15 at 07:58
thanks for the further details, that was really helpful. – Lyubomir Velchev Jun 06 '15 at 08:01

score 0 · Answer 2 · edited Jun 05 '15 at 10:02

0

You can store the value in your application using something like this:

protected void Application_Start()
{
    HttpContext.Current.Application["somevar"] = "0";
}

edited Jun 05 '15 at 10:02

cramopy

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answered Jun 05 '15 at 09:50

Rahul Tripathi

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I guess I should do locking as this is common resource for all users? – Lyubomir Velchev Jun 05 '15 at 09:51
@LyubomirVelchev:- Indeed you can by using the Application variable your all users can use the variable value once the application starts. – Rahul Tripathi Jun 05 '15 at 09:53

score 0 · Answer 3 · answered Jun 05 '15 at 10:03

Something like that will work for me:

Application.Lock();
Application["PageRequestCount"] = 
    ((int)Application["PageRequestCount"])+1;
Application.UnLock();

Here I can save data from user and store it in a data object which will be in application - stored in memory. My idea is to make a chat, but not use a db, relying solely on RAM. So every user will have their messages in their own session, when the user want to submit a message, it will lock and save in messages collection common for all users and the unlock. When the user read - there will be no need for unlocking. Just elaborating about possible use of that, but the answer of the question is the 3 lines source code.

Store data in memory which can be access from all users asp.net mvc

3 Answers3