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      2. 如何获取字符串的前五个字符

        时间:2023-05-20

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                  本文介绍了如何获取字符串的前五个字符的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  限时送ChatGPT账号..

                  我已阅读此问题以获取字符串的第一个字符.有没有办法从 C# 中的字符串中获取前 n 个字符?

                  I have read this question to get first char of the string. Is there a way to get the first n number of characters from a string in C#?

                  推荐答案

                  你可以使用 Enumerable.Take 喜欢:

                  char[] array = yourStringVariable.Take(5).ToArray();
                  

                  或者您可以使用 String.子字符串.

                  string str = yourStringVariable.Substring(0,5);
                  

                  请记住,如果字符串的长度小于所需的字符,String.Substring 可能会引发异常.

                  Remember that String.Substring could throw an exception in case of string's length less than the characters required.

                  如果您想以字符串形式返回结果,则可以使用:

                  If you want to get the result back in string then you can use:

                  • 使用String Constructor和LINQ的Take

                  string firstFivChar = new string(yourStringVariable.Take(5).ToArray());
                  

                  该方法的优点是不会事先检查长度.

                  The plus with the approach is not checking for length before hand.

                  • 另一种方法是使用 String.Substring 进行错误检查
                  • The other way is to use String.Substring with error checking

                  喜欢:

                  string firstFivCharWithSubString = 
                      !String.IsNullOrWhiteSpace(yourStringVariable) && yourStringVariable.Length >= 5
                      ? yourStringVariable.Substring(0, 5)
                      : yourStringVariable;
                  

                  这篇关于如何获取字符串的前五个字符的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

                  上一篇:如何检查字符串是否包含从 a 到 z 的任何字母? 下一篇:如何计算字符串中的唯一字符

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