提取文本的一部分 [英] Extracting part of a text

问题描述

大家好，
我想提取从列表框中得到的部分文本.
这是场景:

Hi guys,
I want to extract part of a text I get from list box.
Here is the scenario:

int indexValue = m_listItem.GetCursel();
CString strText;
m_listItem.GetText(indexValue, strText);

我只是说出来，这样您才能了解其中的来源.
好吧，假设strText中的文本为:"1 17:28:07 76 172.17.70.10 62996 193.65.41.23 53"
我的问题是如何从文本中仅提取17:28:07或172.17.70.10.

非常感谢.

I only put that out so you can understand where am coming from.
Alright, assuming the text in the strText is: "1 17:28:07 76 172.17.70.10 62996 193.65.41.23 53"
My problem is how could I extract just 17:28:07 or 172.17.70.10 from the text.

Many thanks.

推荐答案

您可以使用正则表达式进行提取.也许只是将字符串拆分为一个空格字符，然后抓住相关部分就足够了.这实际上取决于输入的结构.

干杯

曼弗雷德(Manfred)

You could use regular expressions to do the extraction. Maybe just splitting the string at a space character and grabbing the relevant parts would suffice. That really depends on how your input is structured.

Cheers

Manfred

您可以(从最高级别向下...):

• (已经建议)使用模式匹配库，例如正则表达式解析器(谷歌提供免费的C++库).
• 使用简单的CString方法，例如标记化 [

You may (from highest level downwards...):

• (As already suggest) Use a pattern matching library, like a regular expression parser (google for a free C++ library).
• Use simple CString methods like Tokenize[^].
• Parse yourself the string for such patterns (you would have some fun with this approach...).

CString::Tokenize()需要进行迭代，直到无法提取输入中的所有部分.

在标准C ++库的帮助下，您可以立即执行以下操作:

Hi,

CString::Tokenize() requires to be iterated until failure to extract all the parts in your input.

With the help of the Standard C++ Library you can do it at once:

#include <vector>
#include <sstream>
#include <iterator>
#include <algorithm>
// ...
int indexValue = m_listItem.GetCursel();
CString strText;
m_listItem.GetText(indexValue, strText);

std::vector<std::string> parts;
std::istringstream iss(strText.GetBuffer());
std::copy(std::istream_iterator<std::string>(iss), std::istream_iterator<std::string>(), std::back_inserter(parts));

在"1 17:28:07 76 172.17.70.10 62996 193.65.41.23 53"中strText，您进入parts[0x00000007] ("1","17:28:07","76","172.17.70.10","62996","193.65.41.23","53").

欢呼声，
AR

With "1 17:28:07 76 172.17.70.10 62996 193.65.41.23 53" in strText, you get in parts[0x00000007] ("1","17:28:07","76","172.17.70.10","62996","193.65.41.23","53").

cheers,
AR

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