private static void LinqSelect()
{
List <int> listint = new List <int> {
1, 2, 3
};
Console.WriteLine(string.Join(",", listint));
var listint2 = (from c in listint
select c + 2).ToList();
Console.WriteLine(string.Join(",", listint2));
List <LinqClass> linqClasses = new List <LinqClass> {
};
LinqClass linqClass1 = new LinqClass
{
Index = 1,
Name = "第一个值"
};
LinqClass linqClass2 = new LinqClass
{
Index = 2,
Name = "第二个值"
};
linqClasses.Add(linqClass1);
linqClasses.Add(linqClass2);
foreach (var item in linqClasses)
{
Console.WriteLine(item.Index + " " + item.Name);
}
var dealer = (from c in linqClasses
where c.Index > 0
select c
).FirstOrDefault();
var testCar = (from c in linqClasses
orderby c.Index descending
select c
).FirstOrDefault();
var testCar2 = (from c in linqClasses
orderby c.Index ascending
select c
).FirstOrDefault();
}
static void DisplayLinqExpressions()
{
int test = -1;
while (test != 0)
{
Console.ForegroundColor = ConsoleColor.DarkCyan;
Console.Write("Linq - Enter exercise no: (1 to 4) ");
string input = Console.ReadLine();
Console.Clear();
int.TryParse(input, out test);
Console.ForegroundColor = ConsoleColor.Green;
switch (test)
{
case 0:
break;
case 1:
LinqClass Lq = new LinqClass("Linq expressions - ");
break;
case 2:
Console.WriteLine("Not implemented!");
break;
case 3:
Console.WriteLine("Not implemented!");
break;
case 4:
Console.WriteLine("Not implemented!");
break;
default:
Console.WriteLine("Not implemented!");
break;
}
}
}
