序列化對象數組屬性值

Question

採取以下程序：

using System; 
using System.Collections.Generic; 
using System.Linq; 

class Person 
{ 
    public string FirstName { get; set; } 
    public string LastName { get; set; } 
    public int Age { get; set; } 
} 

class Program 
{ 
    static void Main() 
    { 
     var records = new Person[] 
     { 
      new Person{ FirstName = "John", LastName = "Doe", Age = 32 }, 
      new Person{ FirstName = "Jane", LastName = "Doe", Age = 27 }, 
      new Person{ FirstName = "Joe", LastName = "College", Age = 28 } 
     }; 

     Console.WriteLine(string.Join(", ", records.Select(r => new 
     { 
      FullName = r.FirstName + " " + r.LastName 
     }))); 
    } 
} 

其預期輸出是：

John Doe, Jane Doe, Joe College

但其實際輸出是：

{ FullName = John Doe }, { FullName = Jane Doe }, { FullName = Joe College }

是否有可能從WriteLine內部解析此？

這是我最近遇到的一個更大問題的簡化，我需要從WriteLine內部解決這個問題，因爲我在查詢中執行了這個「序列化」我不能執行一個以上的陳述。

Answer 1

而不是選擇匿名使用類型：

records.Select(r => r.FirstName + " " + r.LastName) 

所以你Console.WriteLine可能是：

Console.WriteLine(string.Join(", ", records.Select(r => r.FirstName + " " + r.LastName))); 

Answer 2

試試這個，

Console.WriteLine(string.Join(", ", records.Select(r => String.Format("{0} {1}", r.FirstName, r.LastName))); 

Answer 3

你現在重新創建一個動態對象。我覺得你的意思是這樣的：

Console.WriteLine(string.Join(", ", records.Select(r => r.FirstName + " " + r.LastName))); 

Answer 4

只需使用內嵌的lambda表達式如下：

Console.WriteLine(string.Join(", ", records.Select(r => r.FirstName + " " + r.LastName)); 

Answer 5

我建議有一個ToString（）方法。這使得這種方法更加乾淨。

public class Person { 
    public string FirstName { get; set; } 
    public string LastName { get; set; } 
    public int Age { get; set; } 
    public override string ToString() { 
     return string.Format("{0} {1}", FirstName, LastName); 
    } 
} 

然後

Console.WriteLine(string.Join(", ", records.Select(r => r.ToString())));