CODEWITHSUNDEEP
c#
TBK
TBK

Reputation: 51

Send variables to other classes

Can I have a function that checks if true or false and send my verbal to other classes?

I tried:

public class Func
{
    public static bool CheckDate(string number)
    {
        string new_number = number.ToString();
        if (new_number.Length==8)
        {
           string yyyy = new_number.Substring(0, 4);
           string mm = new_number.Substring(4, 2);
           string dd = new_number.Substring(6, 2);
           return true;
        }
        else
        {
            return false;
        }
    }
}

I want to send the verbal yyyy, mm, dd to my Program.cs class.

What should I do?

Upvotes: 0

Views: 131

Answers (3)

THE ONLY ONE
THE ONLY ONE

Reputation: 2190

you have to declare your variables as below...

 public static  string yyyy;
 public static  string mm ;
 public static  string dd ;

Or 

 protected static  string yyyy;
 protected static  string mm ;
 protected static  string dd ;

as per your need and depends where your program.cs file is...

Upvotes: -1

Darin Dimitrov
Darin Dimitrov

Reputation: 1039488

Don't reinvent wheels, use the DateTime.TryParseExact method which is built specifically for this purpose. Forget about regexes and substrings when you are dealing with dates in the .NET framework:

public static bool CheckDate(string number, out DateTime date)
{
    return DateTime.TryParseExact(number, "dd/MM/yyyy", CultureInfo.InvariantCulture, DateTimeStyles.None, out date);
}

And now as you can see defining the CheckDate becomes kinda meaningless because it already exists in the BCL. You would simply use it like this:

string number = "that's your number coming from somewhere which should be a date";
DateTime date;
if (DateTime.TryParseExact(
    number, 
    "dd/MM/yyyy", 
    CultureInfo.InvariantCulture, 
    DateTimeStyles.None, 
    out date
))
{
    // the number was in the correct format 
    // => you could use the days, months, from the date variable which is now a DateTime

    string dd = date.Day.ToString();
    string mm = date.Month.ToString();
    string yyyy = date.Year.ToString();
    // do whatever you intended to do with those 3 variables before
}
else
{
    // tell the user to enter a correct date in the format dd/MM/yyyy
}

UPDATE:

Since I got a remark in the comments section that I am not actually answering the question, you could use a similar approach to the one I recommend. But please, promise me you will never write a code like this, it's just for illustration of the TryXXX pattern.

define a model:

public class Patterns
{
    public string DD { get; set; }
    public string MM { get; set; }
    public string YYYY { get; set; }
}

and then modify your CheckDate method so that it sends an out parameter:

public static bool CheckDate(string number, out Patterns patterns)
{
    patterns = null;
    string new_number = number.ToString();
    if (new_number.Length == 8)
    {
       Patterns = new Patterns
       {
           YYYY = new_number.Substring(0, 4),
           MM = new_number.Substring(4, 2),
           DD = new_number.Substring(6, 2)
       }
       return true;
    }
    else
    {
        return false;
    }
}

which you could use like this:

string number = "that's your number coming from somewhere which should be a date";
Patterns patterns;
if (CheckDate(numbers, out patterns)
{
    string dd = patterns.DD;
    string mm = patterns.MM;
    string yyyy = patterns.YYYY;
    // do whatever you intended to do with those 3 variables before
}
else
{
    // tell the user to enter a correct date in the format dd/MM/yyyy
}

Upvotes: 7

phaazon
phaazon

Reputation: 2002

The CheckDate function’s aim is to check if a date is valid. Don’t introduce crappy side effects: write another function that actually sends your stuff to the object you want.

If you want to check if a string is a date, do it in CheckDate.

When you know a string is a date, extract the date elements you want from it through such a ExtractDateElem function, but please, no side-effects.

Upvotes: 0

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