Using one variable from a console in a windows form

Question

I have this project:

And I need to use a variable that is in the "TransactionHandler.cs" in the "Enviar Faturas.cs" the TransactioHandler is a class library and the Enviar Faturas is a Windows Form.
Is it possible to do what I want? If so how should I do it?

UPDATE:

I have this variable declares in TransactionHandler.cs

var numfatura = _transaction.TransDocument + _transaction.TransSerial + _transaction.TransDocNumber;

And I need to use it on the Windows Form "Enviar Faturas".

UPDATE 2:

I have this code to select from a datagridview and write a textfile:

FileInfo arquivo = new FileInfo(@"C:\Users\HP8200\Desktop\faturas\" + r.Index + ".txt");
And I want to change the "r.index" for the variable I showed on the first update

what kind of a variable are you holding in the TransactionHandler? — marto, Aug 25 '17 at 08:41
What do you mean by "variable"? Have you tried a public properly? May be you need to read a little about C# and object-oriented programming? — Alexey Zimarev, Aug 25 '17 at 08:42
I'll add some code to the question so it can be easier to answer. — Josue Figueiredo, Aug 25 '17 at 08:42
it is still unclear of what exactly are you trying to do, can u clarify the piece of code or paste the whole class? — marto, Aug 25 '17 at 08:56
you cannot get to that line of code, if numfatura was a public variable or property yes you probably could but _transaction would need to have been initialized — BugFinder, Aug 25 '17 at 08:58

VIGNESH ARUNACHALAM · Accepted Answer · 2017-08-25T11:31:01.107

1

I would suggest to use a property instead of a public field:

public class TransactionHandler
{
   private static string numfatura = _transaction.TransDocument + _transaction.TransSerial + _transaction.TransDocNumber;

   public static string Numfatura
   { 
        get { return numfatura ; }
        set { numfatura = value; }
   }
}

From another class, you call your variable like this:

public class EnviarFaturas
{
    public void DoSomething()
    {
         string r.Index= TransactionHandler.Numfatura;
    }
}

edited Aug 25 '17 at 11:31

answered Aug 25 '17 at 10:55

VIGNESH ARUNACHALAM

652
4
24

That is called 'property' not 'variable' – D.J. Aug 25 '17 at 11:01
Yes,you are right.This is property,Thanks for your suggestion – VIGNESH ARUNACHALAM Aug 25 '17 at 11:10

score 0 · Answer 2 · answered Aug 25 '17 at 10:58

Ok, from what I understand and having no idea of the execution flow you probably need something like this in the TransactionHandler (a property)

public int Numfatura
        {
            get
            {
                return this._transaction.TransDocument + this._transaction.TransSerial + this._transaction.TransDocNumber;
            }
        }

you can change the type to the one that stands behing the "var" in your code example.

To access it in the form you need an instance of the class (again I dont know what your logic is) but once you get it e.g.

var transactionHandler = new TransactionHandler();

you can simply try

r.Index = transactionHandler.Numfactura;

Keep in mind that you can hit the default data value (for int is 0) if your methods depend upon other event to happen.

I strongly suggest you to learn more about C# and Object Oriented Programming as Alexey Zimarev stated in the comments. Also you should consider how to get/inject a concrete instance in the view. Another good and related read will be singleton pattern, mvp and dependency injection.

Using one variable from a console in a windows form

2 Answers2