Question

In MS Exam 70-536 .Net Foundation, Chapter 3 “Searching, Modifying, and Encoding Text” in Case Scenario 1

Your organization, Northwind Traders, is creating a Web-based application to allow
customers to enter their own contact information into your database. As a new
employee, you are assigned a simple task: create the front-end interface and prepare
the user input to be stored in a database…

there is a question:

How can you constrain the input before you write any code?

I thought it’s maybe a in-mind design of regex pattern but it will not really constrain the input, will it? I am not so good in psychokinesis yet!

Or maybe the is some other way?

Answer 1

I’ve noticed there are answers in the end of the book 🙂

Answer: You can use separate ASP.NET RegularExpressionValidator controls to restrict the
input for each of the three boxes. For the company name validator, set the ValidationExpression
property to “[a-zA-Z’-´\s]{1,40}”. For the contact name validator,
you can use the regular expression, “[a-zA-Z'-´\s]{1,30}”. Finally, for
the phone number validator, you can use ASP.NET’s built-in regular expression,
“(((\d{3}) ?)|(\d{3}-))?\d{3}-\d{4}”.

Still I think it’s not correct, knowledge requirements are

To complete the lessons in this chapter, you should be familiar with Microsoft Visual
Basic or C# and be comfortable with the following tasks:
■ Create a console application in Microsoft Visual Studio using Visual Basic or C#.
■ Add references to system class libraries to a project.
■ Create text files.