static void Main(string[] args)
{
Customer customer1 = new Customer()
{
ID = 101,
Name = "Mark",
Salary = 5000,
};
Customer customer2 = new Customer()
{
ID = 110,
Name = "Pam",
Salary = 6500,
};
Customer customer3 = new Customer()
{
ID = 119,
Name = "John",
Salary = 3500,
};
List <Customer> customers = new List <Customer>(2);
customers.Add(customer1);
customers.Add(customer2);
customers.Add(customer3);
Dictionary <int, Customer> dictionaryCustomer = new Dictionary <int, Customer>();
dictionaryCustomer.Add(customer1.ID, customer1);
dictionaryCustomer.Add(customer2.ID, customer2);
dictionaryCustomer.Add(customer3.ID, customer3);
// Vedio 73
// TryGetValue() method
// the return type is boolean
Customer cust2;
if (!dictionaryCustomer.TryGetValue(101, out cust2)) // out put value to cust
{
Console.WriteLine("ID = {0},Name = {1},Salary = {2},", cust2.ID, cust2.Name, cust2.Salary);
}
else
{
Console.WriteLine("Key is not available");
}
//Count() method
Console.WriteLine("The total count of the dictionary is{0}", dictionaryCustomer.Count());
// There are 2 overloaded version of this Count() method
Console.WriteLine("The total count of the dictionary is{0}", dictionaryCustomer.Count(kvp => kvp.Value.Salary > 400));
//
// remove an item from dictionary
dictionaryCustomer.Remove(109); // if the key does not exit, you would not get an exception.
// remove all the items from the dictionary, you can use clear
//dictionaryCustomer.Clear();
// use linq expression
Customer[] customer = new Customer[3];
customer[0] = customer1;
customer[1] = customer2;
customer[2] = customer3;
// key is the customer id, the value is the customer itself
Dictionary <int, Customer> dic = customer.ToDictionary(cust => cust.ID, cust => cust);
foreach (KeyValuePair <int, Customer> kvp in dic)
{
Console.WriteLine("key = {0},", kvp.Key);
Customer cust = kvp.Value;
Console.WriteLine("ID = {0}, Name = {1}, Salary = {2}", cust.ID, cust.Name, cust.Salary);
}
Customer customer119 = dictionaryCustomer[119];
Console.WriteLine("ID = {0}, Name = {1}, Salary = {2}", customer119.ID, customer119.Name, customer119.Salary);
// you can use var instead of KeyValuePair<>, but this is more clear
foreach (KeyValuePair <int, Customer> customerKeyValuePair in dictionaryCustomer)
{
Console.WriteLine("ID = {0}", customerKeyValuePair.Key);
Customer cust = customerKeyValuePair.Value;
Console.WriteLine("ID = {0}, Name = {1}, Salary = {2}", cust.ID, cust.Name, cust.Salary);
Console.WriteLine("--------------------------");
}
// the keys in the dictionary must be unique
foreach (int key in dictionaryCustomer.Keys)
{
Console.WriteLine("The key in the dictionary is {0}", key);
Console.WriteLine("**********");
}
if (!dictionaryCustomer.ContainsKey(customer1.ID))
{
dictionaryCustomer.Add(customer1.ID, customer1);
}
Console.ReadLine();
}
static void Main(string[] args)
{
Customer c1 = new Customer
{
ID = 101,
Name = "Mark",
Salary = 500
};
Customer c2 = new Customer
{
ID = 110,
Name = "Richard",
Salary = 5000
};
Customer c3 = new Customer
{
ID = 125,
Name = "Max",
Salary = 500
};
Customer[] customers = new Customer[3];
customers[0] = c1;
customers[1] = c2;
customers[2] = c3;
Dictionary <int, Customer> dict = customers.ToDictionary(cust => cust.ID, cust => cust);
foreach (KeyValuePair <int, Customer> kvp in dict)
{
Console.WriteLine("Key= {0}", kvp.Key);
Customer cust = kvp.Value;
Console.WriteLine("ID = {0} ,Name = {1} ,Salary = {2}", cust.ID, cust.Name, cust.Salary);
}
////Creating the dictionary
//Dictionary<int,Customer> dictionartCustomers = new Dictionary<int, Customer>();
////Adding data to dictionary
//dictionartCustomers.Add(c1.ID,c1);
//dictionartCustomers.Add(c2.ID, c2);
//dictionartCustomers.Add(c3.ID, c3);
////TryGetValue added
//Customer cust;
//if (dictionartCustomers.TryGetValue(101, out cust))
//{
// Console.WriteLine("ID= {0}, Name= {1} , Salary= {2}", cust.ID, cust.Name, cust.Salary);
//}
//else
//{
// Console.WriteLine("The Key is not found");
//}
////Count added
//Console.WriteLine("Total Items = {0}",dictionartCustomers.Count(kvp =>kvp.Value.Salary>4000));
////Remove added
//dictionartCustomers.Remove(110);
////Clear added
//dictionartCustomers.Clear();
//Customer customer101 = dictionartCustomers[101];
//Console.WriteLine("Id = {0} , Name = {1} , salary = {2}",customer101.ID,customer101.Name,customer101.Salary);
//foreach (KeyValuePair<int, Customer> customerKeyValuePair in dictionartCustomers)
//{
// //printing the values
// Console.WriteLine("ID ={0}", customerKeyValuePair);
// Customer cust = customerKeyValuePair.Value;
// Console.WriteLine("ID = {0},Name={1} and salary = {2}",cust.ID,cust.Name,cust.Salary);
// Console.WriteLine("--------------------------------------------");
//}
}