在C＃中连接字符串时如何插入分隔符？

Question

I have a list of strings and I am concatenating it to flatten out the list by using the method seen here on DotNetPerls, http://www.dotnetperls.com/string-concat

My question is...in their List example where their output is "catdogperls" (see toward the bottom of the webpage, just before the Summary) how do I insert a # sign as a separator between "catdogperls" such that it becomes "cat#dog#perls"?

Answer 1

In this case you don't want to use string.Concat() , you want to use string.Join() . This accepts a separator and an array of strings to join by that separator. For example:

var joined = string.Join("#", theArray);

This would place the string value in joined :

"cat#dog#perls"

(assuming, of course, that theArray contains those values)

Answer 2

试试这样：

String.Join("#", catdogperls)

Answer 3

你正在寻找String.Join() ，它采用一个集合和一个分隔符。

Answer 4

Use string.Join() , it allows you to specify the separator you want between each string - it's been in the framework since v2.0.

In later versions of the framework it was extended so that you could pass in an IEnumerable instead of just an array.