CODEWITHSUNDEEP
c#global
Ed Landau
Ed Landau

Reputation: 998

Can I declare a global variable and refer to it from anywhere without referring to its class?

I have a C# console app. I'd like the main program to determine if I'm in DEBUG mode, for example, and set a variable, say... g_Bypass which every class can just refer to.

Example:

class test
{
    public static bool g_testMode;

    test()
    {
        g_testMode = true;  // read from the database.
        // more code...
        Object1 _obj = new Object1();
        // do more stuff with _obj...
    }
}

class Object1
{

    public Object1()
    {
        // constructor
        if (g_testMode)          // << I'd like to just refer to it this way!
        {
            // do something
        }
    }
}

Upvotes: 2

Views: 109

Answers (2)

Steve
Steve

Reputation: 633

If it is debug mode you are worried about you could create a local variable in a method or a member variable within a class definition by doing the following:

#if DEBUG
    bool debug = true;
#else
    bool debug = false;
#endif

If for some reason you want to create a global static:

public static class Test {
#if DEBUG
    public static bool debug = true;
#else
    public static bool debug = false;
#endif
}

This needs to be referenced outside of the object as Test.debug

You need to define the variable DEBUG in the project's build screen

JUST BECAUSE YOU CAN DO THIS DOESN'T MEAN YOU SHOULD!!!

Upvotes: 1

azt
azt

Reputation: 2130

No. In .Net every variable and method has to be enclosed in a class. However, a static public member is accessible with global scope, but you have to prefix it with the class name when using it outside of the class. But you could call your class g, than instead of g_testMode you have to write g.testMode. Although lower-case class names are discouraged, maybe better G.testMode.

Your example would than read as:

static class G //static is not necessary here
{
    public static bool testMode;
}
class test
{
    test()
    {
        G.testMode = true;  // read from the database.
        // more code...
        Object1 _obj = new Object1();
        // do more stuff with _obj...
    }
}

class Object1
{

    public Object1()
    {
        // constructor
        if (G.testMode)          // << I'd like to just refer to it this way!
        {
            // do something
        }
    }
}

Upvotes: 2

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