如何用C#WriteLine存盤在串列中的所有屬性？

我有一個小任務，我必須復習類和屬性的基礎知識。在這段代碼的背景關系中，我試圖弄清楚如何列印存盤在串列中的每個任務的所有屬性。

這是代碼。注釋掉的代碼是我迄今為止嘗試列印存盤在 TaskList 中的每個任務的所有屬性的代碼。

namespace FunProject
{
    internal class Program
    {
        static void Main(string[] args)
        {
            var person1 = new Person
            {
                FirstName = "Mister",
                LastName = "Programmer",
                Age = 26
            };
            Console.WriteLine(person1.FullName());

            var Task1 = new Task
            {
                TaskName = "read",
                Description = "gain knowledge",
                Id = 1,
                IsDone = true
            };

            var Task2 = new Task
            {
                TaskName = "eat",
                Description = "gain sustenance",
                Id = 2,
                IsDone = false
            };

            person1.TaskList = new List<Task>();
            person1.TaskList.Add(Task1);
            person1.TaskList.Add(Task2);

            //Person1.TaskList.ForEach(i => Console.Write("{0}\t", i));

            //Person1.TaskList.ForEach (x => Console.WriteLine(x));

            //Console.WriteLine(String.Join("{0}\t", Person1.TaskList.ToString()));
            //foreach (Task t in Person1.TaskList)
            //{
            //    Console.WriteLine(t);
            //}

            Console.Read();
        }
    }

    public class Person
    {
        public string FirstName { get; set; }
        public string LastName { get; set;}
        public int Age { get; set; }
        public List<Task>TaskList { get; set; }
        public string FullName()
        {
            return ($"{FirstName} {LastName}");
        }
    }

    public class Task
    {
        public int Id { get; set; }
        public string TaskName { get; set;}
        public string Description { get; set; }
        public bool ?IsDone { get; set;}
    }
}

輸出應該是這樣的：

Mister Programmer
Current Tasks:
TaskName: read
TaskDescription: gain knowledge
Id: 1
IsDone: true

TaskName: eat
TaskDescription: gain sustenance
Id: 2
IsDone: false  

uj5u.com熱心網友回復：

如果你想解決這個問題，我首先要做的是，我將創建類似這樣的任務串列：

var list = new List<Task>();
list.Add(Task1);
list.Add(Task2);

然后我會將此串列添加到您正在創建的人中

var person1 = new Person
            {
                FirstName = "Mister",
                LastName = "Programmer",
                Age = 26,
                TaskList = list
            };

所以現在你有了一個擁有任務串列的人。這是您需要為輸出創建的所有內容。

因此，對于輸出，您需要像這樣格式化：

Console.WriteLine(person1.FirstName    " "    person1.LastName);
Console.WriteLine("Current Tasks:");

person1.TaskList.ForEach(x => Console.WriteLine("TaskName:"   " "   
x.TaskName   "\n"   "TaskDescription:"   " "   x.Description   "\n"   "Id:"   " "   x.Id   "\n"   "IsDone:"   " "   x.IsDone.ToString().ToLower()));

Console.Read();

但是，如果您想擁有屬性名稱而不在 Console.WriteLine("TaskDescription") 等中寫入屬性，則需要使用 System.Reflection：

Type t = typeof(Person);
PropertyInfo[] properties = t.GetProperties();
foreach (PropertyInfo prop in properties)
{
 Console.WriteLine(prop.Name);
 if (prop.Name.Equals("TaskList"))
 {
  Type ts = typeof(Task);
  PropertyInfo[] propertiesTask = ts.GetProperties();
  foreach (var propTask in propertiesTask)
  {
    Console.WriteLine(propTask.Name);
  }
 }
}

uj5u.com熱心網友回復：

我會為此使用System.Reflection ...

foreach (var t in person1.TaskList)
{
    foreach (var prop in t.GetType().GetProperties())
    {
        Console.WriteLine($"{prop.Name}: {prop.GetValue(t, null).ToString()}");
    }
    Console.WriteLine("\n");
}

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