C# 除最后一个外，将换行符附加到字符串的最佳方法
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原文地址: http://stackoverflow.com/questions/14140084/
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Best way to append newline to string except for last
提问by Justin
I was looking for the best/cleanest way to iterate over a list of strings and then create a single string of those separated by newlines (except for the last). Like so:
我一直在寻找迭代字符串列表的最佳/最干净的方法，然后创建一个由换行符分隔的字符串（最后一个除外）。像这样：
String 1
String 2
String 3
I have written two loops here which has a newline at the end of the string (which I want to avoid) and another that does not. The one does not just doesn't seem "clean" to me. I would think there would be a simpler way to do it so that the logic is nearly as simple as in the example that has a new line to the end of the string.
我在这里写了两个循环，它们在字符串的末尾有一个换行符（我想避免），另一个没有。对我来说，它不仅看起来“不干净”。我认为会有一种更简单的方法来做到这一点，这样逻辑就几乎像在字符串末尾有一个新行的示例一样简单。
List<string> errorMessages = new List<string>();
string messages = "";
//Adds newline to last string. Unwanted.
foreach(string msg in errorMessages)
{
messages += msg + "\n";
}
messages = "";
bool first = true;
//Avoids newline on last string
foreach (string msg in errorMessages)
{
if(first)
{
first = false;
messages = msg;
}
else
{
messages += "\n" + msg;
}
}
Maybe it is wishful thinking, but I would have thought this was a common enough occurrence to warrant a better way to accomplish my goal.
也许这是一厢情愿的想法，但我会认为这是一个足够常见的事件，以保证有更好的方法来实现我的目标。
采纳答案by Paul Fleming
回答by MrFox
Use join
使用连接
string.Join(System.Environment.NewLine, errorMessages);
回答by Ioannis Karadimas
The shortest way is to use either .Aggregate(...)or String.Join(...).
最短的方法是使用.Aggregate(...)或String.Join(...)。
var messages = errorMessages.Aggregate((x, y) => x + Environment.NewLine + y);
Or
或者
var messages = String.Join(Environment.NewLine, errorMessages);
回答by Vishal Suthar
using System;
string.Join(Environment.NewLine, errorMessages);
