由网友(我看不见、永远有多远つ)分享简介:我有我想要显示在C#它们之间的分隔符的项目清单。使用普通的迭代器我最终会在开始一个额外的分离器或结尾:I have a list of items that I wish to display with a separator between them in C#. Using a normal iterator I...
我有我想要显示在C#它们之间的分隔符的项目清单。使用普通的迭代器我最终会在开始一个额外的分离器或结尾:
I have a list of items that I wish to display with a separator between them in C#. Using a normal iterator I would end up with an extra separator at the beginning or the end:
string[] sa = {"one", "two", "three", "four"};
string ns = "";
foreach(string s in sa)
{
ns += s + " * ";
}
// ns has a trailing *:
// one * two * three * four *
现在我可以用一个for循环,像这样解决这个问题:
Now I can solve this using a for loop like so:
ns = "";
for(int i=0; i<sa.Length; i++)
{
ns += sa[i];
if(i != sa.Length-1)
ns += " * ";
}
// this works:
// one * two * three * four
虽然第二个解决方案可它看起来并不很优雅。有没有更好的方式来做到这一点?
Although the second solution works it doesn't look very elegant. Is there a better way to do this?
推荐答案
您需要内置的 的string.join
方式:
You need the built-in String.Join
method:
string ns = string.Join(" * ", sa);
如果你想与其他集合类型也这样做,那么你仍然可以使用的string.join
如果你创建一个数组首先使用LINQ的的 的ToArray
方式:
If you want to do the same with other collection types, then you can still use String.Join
if you create an array first using LINQ's ToArray
method:
string ns = string.Join(" * ", test.ToArray());
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