StringTrimmer

Don't ever rely on user input! This package offers the ability to trim every string in a class. Sanitizing input data before processing is beneficial.

Problem statement

Standard class for describing a user.

public class User { public string Name {get; set;} public string Surname {get; set;} public string Secondname {get; set;} public string UserName {get; set;} public string Email {get; set;} public string Phone {get; set;} }

Usage of the User class to add a new User record to the database is typical.

Can you find an error?

Try public void CreateUser (User user) { user.Name = user.Name.Trim(); user.Surname = user.Surname.Trim(); user.Secondname = user.Secondname.Trim(); user.Email = user.Email.Trim(); user.Phone = user.Phone.Trim(); }

Error: UserName Trim command is missing. Due to the tiny difference in UserName, this allows for many users while having only one real user.

• "John Doe "
• " John Doe"
• " John Doe "
• "John Doe"

Having the same user registered many times irritates the support personnel!

Note: It is usual for users to not merely input a UserName during registration, but to copy it from other sources with different spaces surrounding (and inside) the name.

Magic bullet! (Usage example)

Try public void CreateUser (User user) { user.TrimExtraSpaces(); // Just one line }