描述
补全代码，通过LINQ实现如下功能：
筛选数组studentArray，筛选条件是名字中包含‘o’的学生信息,并且年龄大于20，将满足条件的学生信息输出到命令行
提示代码
class Student{
public int StudentID { get; set; }
public String StudentName { get; set; }
public int Age { get; set; }
}class Program{
static void Main(string[] args) {
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 },
};
待补全
}
}
补全后的完整代码
class Student
{
public int StudentID {
get; set; }
public String StudentName {
get; set; }
public int Age {
get; set; }
}
class Program
{
static void Main(string[] args)
{
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 },
};
for(int i = 0;i < studentArray.Length;i++)
{
if (studentArray[i].StudentName.Contains('o') && studentArray[i].Age > 20)
{
Console.WriteLine("StudentID: " + studentArray[i].StudentID + " "+ " StudentName: " +studentArray[i].StudentName + " " + " Age: " + studentArray[i].Age);
}
}
}
}
效果图
描述
补全代码，通过LINQ实现如下功能：
将数组studentArray排序，要求根据年龄排序，如果年龄相同，根据StudentID排序，将排序后的学生信息输出到命令行
提示代码
同上
补全后的代码
class Student
{
public int StudentID {
get; set; }
public String StudentName {
get; set; }
public int Age {
get; set; }
}
class Program
{
static void Main(string[] args)
{
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 },
};
studentArray = studentArray.OrderBy(x => x.Age).ThenByDescending(x => x.StudentID).ToArray();
Console.WriteLine("StudentID\t" + "StudentName\t" + "Age\t");
for (int i = 0; i < studentArray.Length; i++)
{
Console.WriteLine(" " + studentArray[i].StudentID + "\t\t " + studentArray[i].StudentName + "\t\t " + studentArray[i].Age);
}
}
}
效果图
描述
补全代码，通过LINQ实现如下功能：
根据SudentID进行分组，输出SudengtId分别为奇数/偶数的学生信息
提示代码
同上
补全后的代码
class Student
{
public int StudentID {
get; set; }
public String StudentName {
get; set; }
public int Age {
get; set; }
public bool Key {
get; internal set; }
}
class Program
{
static void Main(string[] args)
{
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 },
};
var query = from stu in studentArray group stu by stu.StudentID % 2;
foreach(var student in query) {
Console.WriteLine(student.Key == 0 ? "----------------偶数----------------" : "----------------奇数----------------");
Console.WriteLine("StudentID\t" + "StudentName\t" + "Age\t");
foreach (var item in student)
{
Console.WriteLine(" " + item.StudentID + "\t\t " + item.StudentName + "\t\t " + item.Age);
}
}
}
}
效果图
描述
补全代码，通过LINQ实现如下功能：
输出sudengtArray信息，要求不输出SudengtID字段，输出SudengtName和Age，其中SudengtName要求根据Gender增加Mr. 和Ms. 前缀
提示代码
class Student{
public int StudentID { get; set; }
public String StudentName { get; set; }
public int Age { get; set; }
public String Gender { get; set; }
}class Program{
static void Main(string[] args) {
Student[] studentArray = {
new Student() { StudentID = 1, StudentName = “John”, Age = 18, Gender = “Male” },
new Student() { StudentID = 2, StudentName = “Steve”, Age = 21, Gender = “Male” },
new Student() { StudentID = 3, StudentName = “Bill”, Age = 25, Gender = “Male” },
new Student() { StudentID = 4, StudentName = “Ram” , Age = 21, Gender = “Male” },
new Student() { StudentID = 5, StudentName = “Ron” , Age = 31, Gender = “Female” },
new Student() { StudentID = 6, StudentName = “Chris”, Age = 17, Gender = “Female” },
new Student() { StudentID = 7, StudentName = “Rob”,Age = 19, Gender = “Male” },
};
//待补全...
}
}
补全后的代码
class Student
{
public int StudentID {
get; set; }
public String StudentName {
get; set; }
public int Age {
get; set; }
public String Gender {
get; set; }
}
class Program
{
static void Main(string[] args)
{
Student[] studentArray = {
new Student() {
StudentID = 1, StudentName = "John", Age = 18, Gender = "Male" },
new Student() {
StudentID = 2, StudentName = "Steve", Age = 21, Gender = "Male" },
new Student() {
StudentID = 3, StudentName = "Bill", Age = 25, Gender = "Male" },
new Student() {
StudentID = 4, StudentName = "Ram" , Age = 21, Gender = "Male" },
new Student() {
StudentID = 5, StudentName = "Ron" , Age = 31, Gender = "Female" },
new Student() {
StudentID = 6, StudentName = "Chris", Age = 17, Gender = "Female" },
new Student() {
StudentID = 7, StudentName = "Rob",Age = 19, Gender = "Male" },
};
var query = from stu in studentArray where stu.Age > 0 select stu;
Console.WriteLine("StudentName\t" + "Age");
foreach (var student in query)
{
if (student.Gender != "Male")
{
Console.WriteLine("Ms." + student.StudentName + "\t\t" + student.Age);
} else
{
Console.WriteLine("Mr." + student.StudentName + "\t\t" + student.Age);
}
}
}
}
效果图
