Ok I am writing a sort of point of sales program. I need to know how i can compare what the user entered as a zip code...and compare the first three characters to determine shippping charges.

Example:

Shipping Charges:
Zip Code:
    700xx, 701xx, 702xx, 703xx, 704xx 12.00
    705xx 8.00
    706xx 5.00
    707xx, 708xx, 709xx 10.00
    Any others in state of LA 12.00
    Any others outside of LA 25.00

Any ideas? I would like to check the first three letters to verify that they are in state and determine the third using maybe a switch statement to apply the shipping charges but i dont know how.

string sInput = "";
string sZip = "";

sInput = txt.Text;
sZip = sInput.Substring(0, 3)

sZip now contains the first 3 characters of the users input. Of course you can skip this step and do something like

if(sInput.Substring(0, 3) == "xxx")
{
//do something
}

================================================== =========
I will only tell you how to do it, not do it for you.
Unless, of course, you want to hire me to do work for you.
================================================== =========
Read this if you want to know how to get a correct reply for your question:
http://www.catb.org/~esr/faqs/smart-questions.html
^^Took that from planoie's profile^^
^^Modified text taken from gbianchi profile^^
================================================== =========

sInput = txt.Text;
sZip = sInput.Substring(0, 3)

Ok i think mine will be a little bit different, but i think i understand it. I am going to parse the value from input entered in a textbox, and assign it to my input string. The second line is me moving the first three chars into my zip string. Correct? Also I am required to use a switch statement in this prog and i think this is the best place to do it. Can i do something like:

switch(szip)
{
     case '703':
         {
          //do something
          break;
         }
      case '704':
         {
          //do something else
          break;
         }

will that work???

Seymour

Yes. Substring, in this instance, takes 2 parameters: a start index and a number of places to move from that index.

Also, make sure you check the length of the string being passed in if, for example, a user entered 77 as the zip, you will throw an exception because there is no 3rd position in the string.


================================================== =========
I will only tell you how to do it, not do it for you.
Unless, of course, you want to hire me to do work for you.
================================================== =========
Read this if you want to know how to get a correct reply for your question:
http://www.catb.org/~esr/faqs/smart-questions.html
^^Took that from planoie's profile^^
^^Modified text taken from gbianchi profile^^
================================================== =========

OK one more thing. How do I check an input for a specific number of characters?
I understand the concept, it's the syntax i am unsure of.

It would be something like:
if(sZip.Length < 3)
{
//do something
}
else
{
//switch
}

================================================== =========
I will only tell you how to do it, not do it for you.
Unless, of course, you want to hire me to do work for you.
================================================== =========
Read this if you want to know how to get a correct reply for your question:
http://www.catb.org/~esr/faqs/smart-questions.html
^^Took that from planoie's profile^^
^^Modified text taken from gbianchi profile^^
================================================== =========