如何查找字符串中某个特定句子的所有出现? [英] How do I find all occurrences of a specific sentence within a string?

问题描述

假设我有一个像这样的字符串:

Let's say I had a string like this:

string source = "Today is friday! I'm am having trouble programming this. Today is friday! Tomorrow is saturday. Today is friday!"

我想搜索这个字符串，抓住所有说今天是星期五！"的句子，然后用刚刚找到的句子创建一个新的字符串.

I want to search through this string, grab all the sentences that say "Today is friday!", and create a new string with the sentences I just found.

上述字符串的预期结果是:

The expected result from the above string is:

string output = "Today is friday!Today is friday!Today is friday!"

LINQ不是必需的.

谢谢！

推荐答案

这是一种非LINQ的方法:

Here's a non-LINQ method of doing it:

string str = "Today is friday! I'm am having trouble programming this. Today is friday! Tomorrow is saturday. Today is friday!";

StringBuilder sb = new StringBuilder();
int index = 0;
do
{
    index = str.IndexOf("Today is friday!", index);
    if (index != -1)
    {
        sb.Append("Today is friday!");
        index++;
    }
} while (index != -1);

string repeats = sb.ToString();

这篇关于如何查找字符串中某个特定句子的所有出现?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IT屋！