Question

Trying to write a piece of code to compare two strings. If either are equal to the textbox then it opens a new winform. I know how to do the winform part.

string CreditCard1 = "Some numbers";

        string CreditCard2 = "Some Numbers";
        string RFIDCard1 = "E00700000330E44C";
        string RFIDCard2 = "E00700000338E539";

        if(CardScan_txtBx = CreditCard1 || RFIDCard1)`

I get an error from MSVS 2010 saying:

Operator ‘||’ cannot be applied to operands of type ‘string’ and ‘string’

Is there a way to do what I want?

Answer 1

This line is the culprit:

  if(CardScan_txtBx = CreditCard1 || RFIDCard1)`

Try:

  if(CardScan_txtBx.Text == CreditCard1 || CardScan_txtBx.Text == RFIDCard1)

On a side note, it scares me that you’re apparently working with credit card information, but don’t know how to compare values in a text box. I really, really hope, for the sake of your customers, that you plan on investigating how to securely manage that information.