Question

I have about 10 Session variable for storing the File Download Counts of each different 10 Categories wise. I dont know why? but my session variable that is set into Global.asax get RESET automatically.

Since, the Machine is not restarted. Still the Counter of File Downloads get Reset. Any Idea? Plz Suggest me any solution.

In Global.asax:

 void Application_Start(object sender, EventArgs e) 
    {
        Application.Add("MGM",0);
        Application.Add("PC",0);
        Application.Add("NC",0);
        Application.Add("TC",0);
        Application.Add("PGC",0);
    }

    The *shortCode* parameter is name of Global Session from Global.asax file. that i am passing to get the counter and increment accordingly.
In Download.aspx.cs Page:

private int GetCount(string shordCode)
{
    int count=0;
    count = Convert.ToInt32(Application[shortCode]);
    lock (Application[shortCode])
    {
        Application[shortCode] = ++count;
    }

    return count;
}

Shall i store value in textfile and update accordingly after certain count say 500. if yes how to do? Our colleague says that if suppose many users downloading file and if both access the same value from textfile then cuncurency may occurs.I am Confused…!Help Appreciated.

Answer 1

Please refer to the MSDN page for ASP.NET Application State

Excerpt:

Because application state is stored in server memory, it
is lost whenever the application is stopped or restarted. For example,
if the Web.config file is changed, the application is restarted and
all application state is lost unless application state values have
been written to a non-volatile storage medium such as a database.

By default, ASP.NET applications running on IIS will have their application pool shut down during periods of inactivity. I believe the default value for this is 20 minutes. Also by default, applications pools are recycled every 1740 minutes (29 hours).

When this happens you will lose anything in the Application[] collection that you haven’t stored in a more permanent location, such as a database.

Both of the above-mentioned values can be modified by right-clicking on the specific application pool in inetmgr and clicking on Advanced Properties to bring up the appropriate window.