C#学习相关系列之Linq用法---where和select用法（二）

var tt=list.select(p=>p+10);
//select括号内为List中的每一项，p+10即为对每一项的操作，即对每项都加10生成新的List

int[] array = { 1,5,6,7,6,9,12,2,7,6,33};
List<int> l1 = new List<int>(array);
var t1 = l1.Select((p)=>p+10);
foreach (var item in t1)
{
     Console.WriteLine(item);
}

List<Student_1> stuList = new List<Student_1>()
            {
                new Student_1(){ID=1,Name="John",Chinese=92,Math=88,English=92},
                new Student_1(){ID=2,Name="Mary",Chinese=87,Math=94,English=82},
                new Student_1(){ID=3,Name="KangKang",Chinese=89,Math=91,English=96},
                new Student_1(){ID=4,Name="Maria",Chinese=88,Math=65,English=94},
                new Student_1(){ID=5,Name="Ben",Chinese=70,Math=91,English=82},
            };
            var t1 = from e in stuList select e.English;
            foreach (var item in t1)
            {
                Console.WriteLine(item);
            }

List<List<int>> list = new List<List<int>>()
{
    new List<int>() { 1, 2, 3 },
    new List<int>() { 4, 5, 6 },
    new List<int>() { 7, 8, 9 }
};
var result = list.SelectMany(x => x);
foreach (var item in result)
{
    Console.WriteLine(item);
}

List<Student_1> stuList = new List<Student_1>()
            {
                new Student_1(){ID=1,Name="John",Chinese=92,Math=88,English=92},
                new Student_1(){ID=2,Name="Mary",Chinese=87,Math=94,English=82},
                new Student_1(){ID=3,Name="KangKang",Chinese=89,Math=91,English=96},
                new Student_1(){ID=4,Name="Maria",Chinese=88,Math=65,English=94},
                new Student_1(){ID=5,Name="Ben",Chinese=70,Math=91,English=82},
            };
            
            //lambda表达式 表达式内部填的是判断条件
            var t1 = stuList.Where(p => p.English == 88);
            // Linq 语句
            var t1 = from e in stuList where e.English == 82 select e;