static void Main(string[] args)
{
Console.WriteLine("LINQ Query to Array");
// Data source
string[] names = { "Bill", "Steve", "James", "Mohan" };
// LINQ Query
var myLinqQuery = from name in names
where name.Contains('a')
select name;
// Query execution
foreach (var name in myLinqQuery)
{
Console.WriteLine(name + " ");
}
Student[] studentArray =
{
new Student()
{
StudentID = 1, StudentName = "John", Age = 18
},
new Student()
{
StudentID = 2, StudentName = "Steve", Age = 21
},
new Student()
{
StudentID = 3, StudentName = "Bill", Age = 25
},
new Student()
{
StudentID = 4, StudentName = "Ram", Age = 20
},
new Student()
{
StudentID = 5, StudentName = "Ron", Age = 31
},
new Student()
{
StudentID = 6, StudentName = "Chris", Age = 17
},
new Student()
{
StudentID = 7, StudentName = "Rob", Age = 19
},
};
Student[] students = StudentExtension.Where(studentArray, delegate(Student std) {
return(std.Age > 12 && std.Age < 20);
});
// Use LINQ to find teenager students
Student[] teenAgerStudents = studentArray.Where(s => s.Age > 12 && s.Age < 20).ToArray();
// Use LINQ to find first student whose name is Bill
Student bill = studentArray.Where(s => s.StudentName == "Bill").FirstOrDefault();
// Use LINQ to find student whose StudentID is 5
Student student5 = studentArray.Where(s => s.StudentID == 5).FirstOrDefault();
Console.WriteLine("LINQ Query Syntax, example 1:");
// string collection
IList <string> stringList = new List <string>()
{
"C# Tutorials",
"VB.NET Tutorials",
"Learn C#",
"MVC Tutorials",
"Java"
};
// LINQ Query Syntax
var result = from s in stringList
where s.Contains("Tutorials")
select s;
foreach (var str in result)
{
Console.WriteLine(str);
}
Console.WriteLine("LINQ Query Syntax, example 2:");
IList <Student> studentList = new List <Student>()
{
new Student()
{
StudentID = 1, StudentName = "John", Age = 13
},
new Student()
{
StudentID = 2, StudentName = "Moin", Age = 21
},
new Student()
{
StudentID = 3, StudentName = "Bill", Age = 18
},
new Student()
{
StudentID = 4, StudentName = "Ram", Age = 20
},
new Student()
{
StudentID = 5, StudentName = "Ron", Age = 15
}
};
var teenAgerStudent = from s in studentList
where s.Age > 12 && s.Age < 20
select s;
Console.WriteLine("Teen age Students:");
foreach (Student std in teenAgerStudent)
{
Console.WriteLine(std.StudentName);
}
Console.ReadKey();
}
