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check Zipcode in a string

How can I check if a string contain zipcode in Regex?
san francisco, ca 91000  or san francisco ca 91000

I want to make it san francisco, CA 91000

String ZipRegex = @"^\d{5}$";

  String ZipRegex = @"^\d{5}$";
   if(Regex.IsMatch(ZipTextBox.Text, ZipRegex))
   {
      ResultLabel.Text = "ZIP is valid!";
   }
   else
   {
      ResultLabel.Text = "ZIP is invalid!";
   }

0
VBdotnet2005
Asked:
VBdotnet2005
1 Solution
 
käµfm³d 👽Commented:
Try this:

String ZipRegex = @"\b\d{5}\b";

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Be advised:  this will check that a string of 5 digits occurs anywhere in the string, but not that it is necessarily a zip code.
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