c#截取两个指定字符串中间的字符串
2021-07-09 10:06
标签：substring bsp 截取 lin mat index span pre new 写法有很多，记录常用的两种： 1、正则表达式 2、利用字符串indexof截取： 就效率来说，测试了几次，方法2比方法1大约快10倍 c#截取两个指定字符串中间的字符串 标签：substring bsp 截取 lin mat index span pre new 原文地址：https://www.cnblogs.com/jolins/p/9714238.html1 public static string MidStrEx_New(string sourse, string startstr, string endstr)
2 {
3 Regex rg = new Regex("(?" + startstr + "))[.\\s\\S]*?(?=(" + endstr + "))", RegexOptions.Multiline | RegexOptions.Singleline);
4 return rg.Match(sourse).Value;
5 }
1 public static string MidStrEx(string sourse, string startstr, string endstr)
2 {
3 string result = string.Empty;
4 int startindex, endindex;
5 try
6 {
7 startindex = sourse.IndexOf(startstr);
8 if (startindex == -1)
9 return result;
10 string tmpstr = sourse.Substring(startindex + startstr.Length);
11 endindex = tmpstr.IndexOf(endstr);
12 if (endindex == -1)
13 return result;
14 result = tmpstr.Remove(endindex);
15 }
16 catch (Exception ex)
17 {
18 Log.WriteLog("MidStrEx Err:" + ex.Message);
19 }
20 return result;
21 }