连接字符串的最有效方法? [英] Most efficient way to concatenate strings?

问题描述

连接字符串的最有效方法是什么?

What's the most efficient way to concatenate strings?

推荐答案

StringBuilder.Append()方法比使用+运算符要好得多.但是我发现，当执行1000个或更少的串联时，String.Join()甚至比StringBuilder更有效.

The StringBuilder.Append() method is much better than using the + operator. But I've found that, when executing 1000 concatenations or less, String.Join() is even more efficient than StringBuilder.

StringBuilder sb = new StringBuilder();
sb.Append(someString);

String.Join的唯一问题是，您必须使用通用的定界符将字符串连接起来.

The only problem with String.Join is that you have to concatenate the strings with a common delimiter.

，如 @ryanversaw 所指出的，您可以将定界符设置为string.Empty.

as @ryanversaw pointed out, you can make the delimiter string.Empty.

string key = String.Join("_", new String[] 
{ "Customers_Contacts", customerID, database, SessionID });

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