Question

我有这个文本，在另一个文本中：

[text_box title="Michael Jordan" align="left"] Basketballplayer ... 
[/text_box]

我必须将此文本与reqex匹配，并将其替换为：

<div class="text-box alignleft"> <h4>Michael Jordan</h4>

我如何匹配文本框？文本框可以在我的文本中出现多次，具有不同的标题和对齐方式。

谢谢

Answer 1

如果您的文本框的结构如下所示，则可以使用following regex：

\[text_box title="(.*?)" align="(.*?)"

第一组是标题内容，第二组是标题内容

Regex rgx = new Regex("\\[text_box title=\"(.*?)\" align=\"(.*?)\"");
MatchCollection matches = rgx.Matches(input);

foreach(var match in matches)
{
   string title = match.Groups[1].Value;
   string alignment = match.Groups[2].Value;
   string output = string.Format("<div class=\"text-box align{1}"> <h4>{0}</h4>", title, alignment);
   // or in newer .Net Framework
   string output = $"<div class=\"text-box align{alignment}"> <h4>{title}</h4>";
}

Answer 2

尝试使用以下代码段：

string input = "[text_box title=""Michael Jordan"" align=""left""] Basketballplayer[/text_box]";
string pattern = "\[text_box title=""([^""]+)"" align=""([^""]+)"".*";
string replacement = "<div class=""text-box align$2""> <h4>$1</h4></div>";
string result = Regex.Replace(input, pattern, replacement);

要了解模板和替换，您可以看到MSDN。它可以帮助您开始。

Answer 3

我更喜欢Expresso工具来编写和测试正则表达式。它也将生成C＃代码，请参阅下面使用expresso生成的代码块。

using System.Text.RegularExpressions;

/// <summary>
///  Regular expression built for C# on: Mon, May 29, 2017, 02:24:58 PM
///  Using Expresso Version: 3.0.5854, http://www.ultrapico.com
///  
///  A description of the regular expression:
///  
///  \[text_box title="
///      Literal [
///      text_box
///      Space
///      title="
///  [title]: A named capture group. [.*?]
///      Any character, any number of repetitions, as few as possible
///  " align="
///      "
///      Space
///      align="
///  [align]: A named capture group. [.*?]
///      Any character, any number of repetitions, as few as possible
///  ".*\]
///      "
///      Any character, any number of repetitions
///      Literal ]
///  [data]: A named capture group. [.*]
///      Any character, any number of repetitions
///  \[\/text_box\]
///      Literal [
///      Literal /
///      text_box
///      Literal ]
///  
///
/// </summary>
public static Regex regex = new Regex(
      "\\[text_box title=\"(?<title>.*?)\" align=\"(?<align>.*?)\"."+
      "*\\](?<data>.*)\\[\\/text_box\\]",
    RegexOptions.Singleline
    | RegexOptions.CultureInvariant
    | RegexOptions.Compiled
    );


// This is the replacement string
public static string regexReplace = 
      "<div class=\"text-box align${align}\"><h4>${title}</h4>";


//// Replace the matched text in the InputText using the replacement pattern
string result = regex.Replace(InputText,regexReplace);

//// Split the InputText wherever the regex matches
 string[] results = regex.Split(InputText);

//// Capture the first Match, if any, in the InputText
 Match m = regex.Match(InputText);

//// Capture all Matches in the InputText
 MatchCollection ms = regex.Matches(InputText);

//// Test to see if there is a match in the InputText
 bool IsMatch = regex.IsMatch(InputText);

//// Get the names of all the named and numbered capture groups
 string[] GroupNames = regex.GetGroupNames();

//// Get the numbers of all the named and numbered capture groups
 int[] GroupNumbers = regex.GetGroupNumbers();

reqex匹配字符串

3 个答案: