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時裝研究
法律研究如何在 C# 中使用 Comparison 委託對複雜型別列表進行排序？
List 類的 Sort() 方法的過載需要將 Comparison 委託作為引數傳遞。
public void Sort(Comparison<T> comparison)
CompareTo 返回一個整數，指示該例項的值是否小於、等於或大於指定物件的值或其他 Int16 例項。
在 C# 中，Int16.CompareTo() 方法用於將該例項與指定物件或另一個 Int16 例項進行比較。
示例
class Program{
public static void Main(){
Employee Employee1 = new Employee(){
ID = 101,
Name = "Mark",
Salary = 4000
};
Employee Employee2 = new Employee(){
ID = 103,
Name = "John",
Salary = 7000
};
Employee Employee3 = new Employee(){
ID = 102,
Name = "Ken",
Salary = 5500
};
List<Employee> listEmployees = new List<Employee>();
listEmployees.Add(Employee1);
listEmployees.Add(Employee2);
listEmployees.Add(Employee3);
Console.WriteLine("Employees before sorting");
foreach (Employee Employee in listEmployees){
Console.WriteLine(Employee.ID);
}
listEmployees.Sort((x, y) => x.ID.CompareTo(y.ID));
Console.WriteLine("Employees after sorting by ID");
foreach (Employee Employee in listEmployees){
Console.WriteLine(Employee.ID);
}
listEmployees.Reverse();
Console.WriteLine("Employees in descending order of ID");
foreach (Employee Employee in listEmployees){
Console.WriteLine(Employee.ID);
}
}
// Approach 1 - Step 1
// Method that contains the logic to compare Employees
private static int CompareEmployees(Employee c1, Employee c2){
return c1.ID.CompareTo(c2.ID);
}
}
public class Employee{
public int ID { get; set; }
public string Name { get; set; }
public int Salary { get; set; }
}輸出
Employees before sorting 101 103 102 Employees after sorting by ID 101 102 103 Employees in descending order of ID 103 102 101
更新於：19-Aug-2020
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