c# - 如何在c#中连接字符串

Question

我有一个名为 people 的字符串列表。我想将它们组合起来并用逗号分隔它们并将它们存储在一个名为 totalPeopleNames 的变量中。这就是我所拥有的，但它不起作用：

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

最简单的方法是使用String.Join

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

Answer 3

一种可能的解决方案：

string totalPeopleNames = "";

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

更好的：

看看 C#“Text.StringBuilder”：

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

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

Answer 4

您还可以使用聚合扩展方法：

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