/*
* 1. Add the required classes to make the following code compile.
* HINT: Use a Dictionary in the AddressBook class to store Contacts
*
* 2. Run the program and observe the exception.
*
* 3. Add try/catch blocks in the appropriate locations to prevent the program from crashing
* Print meaningful error messages in the catch blocks.
*/
static void Main(string[] args)
{
// Create a few contacts
Contact bob = new Contact()
{
FirstName = "Bob", LastName = "Smith",
Email = "*****@*****.**",
Address = "100 Some Ln, Testville, TN 11111"
};
Contact sue = new Contact()
{
FirstName = "Sue", LastName = "Jones",
Email = "*****@*****.**",
Address = "322 Hard Way, Testville, TN 11111"
};
Contact juan = new Contact()
{
FirstName = "Juan", LastName = "Lopez",
Email = "*****@*****.**",
Address = "888 Easy St, Testville, TN 11111"
};
// Create an AddressBook and add some contacts to it
AddressBook addressBook = new AddressBook();
addressBook.AddContact(bob);
addressBook.AddContact(sue);
addressBook.AddContact(juan);
// Try to add a contact a second time
addressBook.AddContact(sue);
// Create a list of emails that match our Contacts
List <string> emails = new List <string> ()
{
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
};
// Insert an email that does NOT match a Contact
emails.Insert(1, "*****@*****.**");
// making sure contacts were added to the ContactList
Console.WriteLine($"Current Contacts: {addressBook.ContactList.Count}");
// Search the AddressBook by email and print the information about each Contact
foreach (string email in emails)
{
try
{
Contact contact = addressBook.GetByEmail(email);
Console.WriteLine("----------------------------");
Console.WriteLine($"Name: {contact.FullName}");
Console.WriteLine($"Email: {contact.Email}");
Console.WriteLine($"Address: {contact.Address}");
}
catch (NullReferenceException)
{
Console.WriteLine($"'{email}' does not exist.");
}
}
}
static void Main(string[] args)
{
// Linq stuff -------------------------------------------------------------------------------//
Dictionary <string, double> DonutDictionary = new Dictionary <string, double>()
{
{ "Old Fashioned", 2.20 }, { "Blueberry", 2.00 }
};
foreach (KeyValuePair <string, double> donut in DonutDictionary)
{
Console.WriteLine($"A {donut.Key} costs ${donut.Value}");
}
try
{
//code where problem occurs
}
catch (Exception ex)
{
Console.WriteLine($"Error: {ex.Message}");
}
//LINQ Time! Language-Integrated Query. Extension Methods
List <double> DonutPrices = new List <double>()
{
1.00,
2.00,
2.30,
.99
};
// Find most expensive donut
double mostExpensive = DonutPrices.Max();
Console.WriteLine($"The most expensive donut costs ${mostExpensive}");
Console.WriteLine($"The least expensive donut costs ${DonutPrices.Min()}");
Console.WriteLine($"The total of all donut costs ${DonutPrices.Sum()}");
Console.WriteLine($"The average cost of all donuts ${DonutPrices.Average()}");
List <string> donutNames = DonutDictionary.Select(donut => { return(donut.Key); }).ToList();
Console.WriteLine("I'm a MF list of Donut Names created by a ToList() !....");
donutNames.ForEach(name => Console.WriteLine($"{name}"));
// Dictionary<string, double> cheapestDonuts = DonutDictionary.Where(donut => donut.Value < 2.00).ToList();
// End Linq stuff -------------------------------------------------------------------------------//
// Try / Catch Stuff -------------------->
Console.WriteLine("........................ Try / Catch Practice ........................");
try
{
Calculator calculator = new Calculator();
int stupidAnswer = calculator.Divide(42, 0);
Console.WriteLine($"Calc answer or error: ${stupidAnswer}");
}
catch (DivideByZeroException ex)
{
Console.WriteLine("Well, you can't do that - This would blow up a robot in Lost In Space or Star Trek..");
Console.Write($"Here's the actual error: {ex.Message}");
}
// More Try / Catch
Console.WriteLine("..................Try/Catch Employee......................................");
Company chickenShack = new Company()
{
Name = "Greasy Pete's Chicken Shack"
};
chickenShack.AddEmployee(new Employee()
{
FirstName = "Pete", LastName = "Shackleton"
});
chickenShack.AddEmployee(new Employee()
{
FirstName = "Molly", LastName = "Frycook"
});
chickenShack.AddEmployee(new Employee()
{
FirstName = "Pat", LastName = "Buttersmith"
});
List <int> employeeIds = new List <int>()
{
0, 11, 2
};
foreach (int id in employeeIds)
{
try
{
Employee employee = chickenShack.GetEmployeeById(id);
Console.WriteLine($"Employee #{id} is {employee.FirstName} {employee.LastName}.");
}
catch (ArgumentOutOfRangeException ex)
{
// Console.WriteLine("These aren't the droids you're looking for.");
// Console.WriteLine($"Here's the actual error for Arg out of range: {ex.Message}");
Console.WriteLine($"Employee #{id} was not found in the company.");
}
}
// Try / Catch Practice Exercise ........................................................
// Create a few contacts
Contact bob = new Contact()
{
FirstName = "Bob", LastName = "Smith",
Email = "*****@*****.**",
Address = "100 Some Ln, Testville, TN 11111"
};
Contact sue = new Contact()
{
FirstName = "Sue", LastName = "Jones",
Email = "*****@*****.**",
Address = "322 Hard Way, Testville, TN 11111"
};
Contact juan = new Contact()
{
FirstName = "Juan", LastName = "Lopez",
Email = "*****@*****.**",
Address = "888 Easy St, Testville, TN 11111"
};
// Create an AddressBook and add some contacts to it
AddressBook addressBook = new AddressBook();
addressBook.AddContact(bob);
addressBook.AddContact(sue);
addressBook.AddContact(juan);
// Try to addd a contact a second time
addressBook.AddContact(sue);
// Create a list of emails that match our Contacts
List <string> emails = new List <string>()
{
"*****@*****.**",
"*****@*****.**",
"*****@*****.**",
};
// Insert an email that does NOT match a Contact
emails.Insert(1, "*****@*****.**");
// Search the AddressBook by email and print the information about each Contact
foreach (string email in emails)
{
try
{
Contact contact = addressBook.GetByEmail(email);
Console.WriteLine("----------------------------");
Console.WriteLine($"Name: {contact.FullName}");
Console.WriteLine($"Email: {contact.Email}");
Console.WriteLine($"Address: {contact.Address}");
}
catch (KeyNotFoundException ex)
{
Console.WriteLine($"Contact not found - {ex.Message}");
}
}
}