在字符串中拆分和定位字符串的出现 [英] Split and locate occurrences of character strings within string

问题描述

如何在字符串和拆分中找到第二个出现的-"
示例:
myFileName-12345678-Inbound-Test_ND.txt
我只需要获取:myFileName-12345678

How do I find second occurrences "-" in string and split
Example:
myFileName-12345678-Inbound-Test_ND.txt
I need to get only:myFileName-12345678

推荐答案

使用

Use

string[] tokens = originalFileName.Split(new char[] {''-'', ''.''});

之后，根据您的喜好重新组成输出字符串片段.优先使用string.Format而不是字符串连接，例如:

After that, re-compose the output string fragment at your liking. Prefer string.Format over string concatenation, for example:

int tokenLength = tokens.Length;
if (tokenLength > 2)
   myNewFileName = string.Format("{0}-{1}.{2}",
        tokens[0], tokens[1], tokens[tokenLength - 1]);

—SA

—SA

您可以使用Substring 方法获取子字符串，并根据IndexOf(''-'')返回的值定义起点.

You can take the substring using Substring method and define the starting point based on the value returned by IndexOf(''-'').

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