Question

I have an issue with the static method in ASP.NET. I created the Singleton below. During the execution process I will call Context.getInstance() several times and I need the same context value. But, once I make another request (Get, Post, wherever) to the server I need a new context because my context is dependant from .NET HttpContext. But, unfortunately once I call getInstance for the first time the class never will be instantiated again.

Any ideas how I solve this problem?

public class Context
{
   private static Context _context = null;

   private Context()
   { ... }

   public static Context getInstance()
   {
       if (Context._context == null)
           _context = new Context();

       return _context;
   }
}

Answer 1

Get rid of your static variable and store it in HttpContext.Current.Items.

public static Context GetInstance()
{
    if (HttpContext.Current.Items["MyContext"] == null) 
    {
        HttpContext.Current.Items["MyContext"] = new Context();
    }
    return (Context)HttpContext.Current.Items["MyContext"];
}