Question

I have three .cshtml created using WebMatrix:

MyClass.cshtml located at App_Code:

 @functions
 {
    public static string x;

    public static void setX()
    {
        x = "some data";
    }
}

WithSet.cshtml located at the root:

@{
    MyClass.setX();    
}

@MyClass.x

WithoutSet.cshtml located at the root:

@MyClass.x

When I visit WithSet.cshtml, MyClass.x will be set to “some data” and after that, when I visit WithoutSet.cshtml, still the MyClass.x contains “some data”. I was expecting that class to be fresh, not initialized and so MyClass.x. I think I don’t fully understand what is going on, what is the life span of the class? Is the class here static?

Answer 1

Because static objects are shared across the app domain in .net – all users will get the same instance of the class with that static variable having been set.

http://www.foliotek.com/devblog/avoid-static-variables-in-asp-net/

There is a good explanation of what the implications of using static fields in .net are.