如何連接字符串在C＃中

Question

我有一個字符串被稱爲人的名單。我想結合這些並用逗號分隔它們並將它們存儲在一個名爲totalPeopleNames的變量中。這是我有什麼，但它不工作：

string totalPeopleNames = null; 

foreach(var person in people) 
{ 
    Enumerable.Concat(totalPeopleNames, ", " + person.Person.FullName); 
} 

Answer 1

var totalPeopleNames = String.Join(", ",people.Select(p=>p.Person.FullName)) 

Answer 2

一個可能的解決方案：

string totalPeopleNames = ""; 

foreach(var person in people) 
{ 
    totalPeopleNames += totalPeopleNames + ", " + person.Person.FullName; 
} 

更好：

看C＃ 「Text.StringBuilder」：

• http://msdn.microsoft.com/en-us/library/system.text.stringbuilder.aspx

• http://www.dotnetperls.com/stringbuilder

Answer 3

您也可以使用聚合擴展方法：

var result = people.Aggregate((p1, p2) => p1.Person.FullName+ ", " + p2.Person.FullName); 

Answer 4

最簡單的方法是使用[創建逗號分隔字符串C＃的String.Join

var names = String.Join(", ", people.Select(p => p.Person.FullName));