C# How to declare, and use, solution/project level variables?

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December 5th, 2012, 04:33 PM

we5inelgr

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C# How to declare, and use, solution/project level variables?

Hi all,

I'd like to create some variables that are available throught a C# solution, so I don't have to declare them over and over within each method that will use them.

For example. There are two variables that are used very often, in many methods: errorTxt and infoTxt (for logging purposes).

I have a solution, with 2 projects in it. Lets say, project A and B.

Within the A project, I've created a class file called GlobalVars.cs. The B project, b.t.w. has a project dependence on project A (which contains the GlobalVars.cs file).

GlobalVars.cs (with just one string declaration for example):

Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace A
{
    public static class GlobalVars
    {
        static string s_infoTxt = "";

        public static string infoTxt
        {
            get { return s_infoTxt; }
            set { s_infoTxt= value; }
        }

    }
}

How can I use the infoTxt string variable outside this GlobalVars.cs file, and assign it different strings withing different Methods found in both project A and B?

[Edit: Add] b.t.w. I've tried accessing that variable in a class file in project B, like this:

Code:

GlobalVars.infoTxt = "some text";

Error: The name 'GlobalVars' does not exist in the current context

Thanks.

December 5th, 2012, 06:11 PM

BobS0327

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Have you tried adding a reference to Project A in Project B? If that doesn't work, another option might be to use .Net Reflection.

December 5th, 2012, 06:42 PM

we5inelgr

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Join Date: Jun 2012

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Quote:

Originally Posted by BobS0327

Have you tried adding a reference to Project A in Project B? If that doesn't work, another option might be to use .Net Reflection.

Thanks for the reply Bob.

I added a reference in project B, to project A.

Same error.

December 5th, 2012, 09:45 PM

BobS0327

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OK. Well, let's try .Net reflection. I've never attempted Reflection across projects. So, I guess we'll find out if it works or not.

Project A should look similar to the following:

Code:

// Project A
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ProjectB;

namespace ReflectionTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            ProjectBForm1 obj = new ProjectBForm1();
            obj.ProcessRequest(typeof(Program));
        
        }
        public static int A { get; set; }//Getter/Setter is important else "GetProperties" will not be able to detect it
        public static int B { get; set; }

    }
}

Project B should look similar to the following:

Code:

using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Reflection;

namespace ProjectB
{
    public partial class ProjectBForm1 : Form
    {
        public ProjectBForm1()
        {
            InitializeComponent();
        }
        public void ProcessRequest(Type cobraType)
        {
            int a, b;
            foreach (var item in cobraType.GetProperties(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy))
            {
                if (item.Name == "A")
                    a = (int)item.GetValue(null, null);       //Since it is a static class pass null
                else if (item.Name == "B")
                    b = (int)item.GetValue(null, null);
            }
        }

    }
}

I would build Project B first, then build Project A and finally added a reference to Project B in Project A.

Good luck!

December 6th, 2012, 04:46 PM

BobS0327

Contributing User

Join Date: Oct 2012

Posts: 118

Time spent in forums: 3 Days 18 h 48 m 29 sec
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Quote:

How can I use the infoTxt string variable outside this GlobalVars.cs file, and assign it different strings withing different Methods found in both project A and B?
[Edit: Add] b.t.w. I've tried accessing that variable in a class file in project B, like this:

Code:

GlobalVars.infoTxt = "some text";

Another option would be to use the fully qualified reference as follows:

Code:

A.GlobalVars.infoTxt = "some text";

since it is in the A namespace but you're calling it from the B namespace.

C# How to declare, and use, solution/project level variables?

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