private static void Demo01()
{
HR.Trainer trainer = null;
Student[] students;
GetSampleData(24, ref trainer, out students);
Console.WriteLine("Trainer name is {0} {1}", trainer.firstname, trainer.lastname);
Console.WriteLine("Trainer profile as:");
Console.WriteLine(trainer.GetProfileInfo("\t"));
Console.WriteLine(trainer.GetProfileInfo("==>", "\t"));
Console.WriteLine(trainer.GetProfileInfo(indents: "\t", prefix: "==>"));
Console.WriteLine(trainer.GetProfileInfo("==>", indents: "\t"));
Console.WriteLine(trainer.GetProfileInfo(prefix: "==>"));
Console.WriteLine();
Demo01_01(students);
Console.WriteLine();
Demo01_02(students[0], students[1]);
Console.WriteLine();
Demo01_02(students[0], students[1], students[3]);
Console.WriteLine();
var selected = new Student[] { students[0], students[2], students[3] };
Demo01_01(selected);
Console.WriteLine();
Demo01_03(selected);
Console.WriteLine();
Demo01_03(students[0], students[1], students[3], students[4]);
}
private static bool GetSampleData(byte trainAge, ref HR.Trainer trainer,
out Student[] students)
{
if (trainer == null)
{
trainer = new HR.Trainer()
{
firstname = "James", lastname = "Hong"
}
}
;
students = new Student[] {
new Student()
{
firstname = "Ali", lastname = "Baba", Age = 18, Country = "Malaysia"
},
new Student()
{
firstname = "Mike", lastname = "Low", Age = 20, Country = "Singapore"
},
new Student()
{
firstname = "Sline", lastname = "Cow", Age = 19, Country = "Malaysia"
},
new Student()
{
firstname = "New", lastname = "Age", Age = 21, Country = "Indonisa"
},
new Student()
{
firstname = "Jake", lastname = "Rose", Age = 20, Country = "China"
}
};
trainer.SetAge(trainAge);
trainer.Employ();
return(true);
}
}
private static void Demo05()
{
HR.Trainer trainer = null;
Student[] students;
GetSampleData(24, ref trainer, out students);
Demo05_01(students);
{
Console.WriteLine();
var query = from Student rcd in students
select rcd;
Demo05_01(query.ToList());
}
{
Console.WriteLine();
var query = from rcd in students
select rcd;
Demo05_01(query.ToList());
}
{
Console.WriteLine();
var query = from rcd in students
where String.Compare(rcd.Country, "Malaysia", true) == 0
select rcd;
Demo05_01(query.ToList());
}
{
Console.WriteLine();
var query = from rcd in students
orderby rcd.Country descending
select rcd;
Demo05_01(query.ToList());
}
{
Console.WriteLine();
var query = from rcd in students
where rcd.Age < 20
select rcd;
Demo05_01(query.ToList());
}
{
Console.WriteLine();
var query = from rcd in students
where rcd.Age < 20 &&
String.Format("{0}, {1}", rcd.firstname, rcd.lastname).Contains("w")
select rcd;
Demo05_01(query.ToList());
}
{
Console.WriteLine();
var query = from rcd in students
where rcd.Age > 30
select rcd;
if (query.Any())
{
Demo05_01(query.ToList());
}
else
{
Console.WriteLine("No record found");
}
}
}
