本文整理汇总了C#中Student.Where方法的典型用法代码示例。如果您正苦于以下问题：C# Student.Where方法的具体用法？C# Student.Where怎么用？C# Student.Where使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Student的用法示例。
在下文中一共展示了Student.Where方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: FirstLastNameCompare
private static Student[] FirstLastNameCompare(Student[] students)
{
return students
.Where(x => x.FirstName.CompareTo(x.LastName) < 0)
.Select(x => x)
.ToArray<Student>();
}示例2: Main
static void Main()
{
Random rand = new Random();
Student[] students = new Student[10];
string[] firstNames = new string[] { "Niki", "Doncho", "Pesho", "Maria", "Stamat", "Ivan", "Ivo", "Gosho", "Evlogi", "Svetlin" };
string[] lastNames = new string[] { "Kostov", "Minkov", "Peshev", "Ivanov", "Stamatov", "Popov", "Kenov", "Goshev", "Hristov", "Nakov" };
for (int i = 0; i < students.Length; i++)
{
string firstName = firstNames[rand.Next(0, 10)];
string lastName = lastNames[rand.Next(0, 10)];
int fn = int.Parse(rand.Next(1000, 9999).ToString() + "0" + rand.Next(1, 7));
Student student = new Student(firstName, lastName, fn);
for (int j = 0; j < 6; j++)
{
student.Marks.Add(rand.Next(3, 7));
}
students[i] = student;
}
var studentsMarks = students.Where(st => st.FacultyNumber % 100 == 6).Select(st => new { fn = st.FacultyNumber, st.Marks }).ToList();
foreach (var student in studentsMarks)
{
Console.WriteLine("fn-{0}, marks-{1}",student.fn, string.Join(",",student.Marks));
}
}示例3: FirstBeforeLast
// METHODS
public static Student[] FirstBeforeLast(Student[] students)
{
return students.Where(x => x.FirstName.CompareTo(x.LastName) < 0).ToArray();
}示例4: Main
static void Main()
{
//Problem 1. Class Student
var students = new Student[]
{
new Student("Ivan", "Petrov", 20, "1234140", "089945769238", "[email protected]", new List<int>{2,2,2,4}, 1),
new Student("Maria", "Ignatova", 21, "8893746", "0264564708", "[email protected]", new List<int>{3,4,6}, 2),
new Student("Simeon", "Todorov", 25, "563437", "+359266743508", "[email protected]", new List<int>{5,6,6}, 6),
new Student("Asen", "Dimov", 27, "523414466", "08882479360", "[email protected]", new List<int>{5,4,6}, 2)
};
//Problem 2. Students by Group
var groupTwo =
from st in students
where st.GroupNumber == 2
orderby st.FirstName
select st;
Console.WriteLine("Students from group two:");
foreach (var item in groupTwo)
{
Console.WriteLine("First Name: {0}, Last Name:{1}, Age:{2}, Faculty Number:{3}, Phone:{4}, Email:{5}, Grades:{6}", item.FirstName, item.LastName, item.Age, item.FacultyNumber, item.Phone, item.Email, string.Join(",", item.Marks));
}
Console.WriteLine();
//Problem 3. Students by First and Last Name
var firstAndLastName =
from st in students
where st.FirstName[0] < st.LastName[0]
select st;
Console.WriteLine("Students by First and Last Name:");
foreach (var item in firstAndLastName)
{
Console.WriteLine("First Name: {0}, Last Name:{1}, Age:{2}, Faculty Number:{3}, Phone:{4}, Email:{5}, Grades:{6}", item.FirstName, item.LastName, item.Age, item.FacultyNumber, item.Phone, item.Email, string.Join(",", item.Marks));
}
Console.WriteLine();
//Problem 4. Students by Age
var studentsByAge =
from st in students
where st.Age >= 18 && st.Age <= 24
select new { st.FirstName, st.LastName };
Console.WriteLine("Students By Age:");
foreach (var item in groupTwo)
{
Console.WriteLine("First Name: {0}, Last Name:{1}", item.FirstName, item.LastName);
}
Console.WriteLine();
//Problem 5. Sort Students
//LINQ query syntax
var sortStudents =
from st in students
orderby st.FirstName descending,
st.LastName descending
select st;
Console.WriteLine("Sort Students:");
foreach (var item in sortStudents)
{
Console.WriteLine("First Name: {0}, Last Name:{1}", item.FirstName, item.LastName);
}
Console.WriteLine();
//Extension methods
var sortStudentsByNames = students.OrderByDescending(st => st.FirstName).ThenByDescending(st => st.LastName);
Console.WriteLine("Sort Students:");
foreach (var item in sortStudentsByNames)
{
Console.WriteLine("First Name: {0}, Last Name:{1}", item.FirstName, item.LastName);
}
Console.WriteLine();
//Problem 6. Filter Students by Email Domain
var sortStudentsByEmail = students.Where(st => st.Email.EndsWith("abv.bg"));
Console.WriteLine("Sort Students By Email:");
foreach (var item in sortStudentsByEmail)
{
Console.WriteLine("First Name: {0}, Last Name:{1}", item.FirstName, item.LastName);
}
Console.WriteLine();
//Problem 7. Filter Students by Phone
var sortStudentsByPhone = students.Where(st => st.Phone.StartsWith("02") || st.Phone.StartsWith("+3592") || st.Phone.StartsWith("+359 2"));
Console.WriteLine("Sort Students By Phone:");
foreach (var item in sortStudentsByPhone)
{
Console.WriteLine("First Name: {0}, Last Name:{1}, Phone:{2}", item.FirstName, item.LastName, item.Phone);
}
Console.WriteLine();
//Problem 8. Excellent Students
var excellentStudents = students.Where(st => st.Marks.Any(c => c == 6));
Console.WriteLine("Excellent Students:");
foreach (var item in excellentStudents)
{
Console.WriteLine("First Name: {0}, Last Name:{1}", item.FirstName, item.LastName);
//.........这里部分代码省略.........
示例5: AgeRange
public static Student[] AgeRange(Student[] students, int low, int high)
{
return students.Where(x => x.Age > low && x.Age < high).ToArray();
}