正则表达式匹配div标签之间的内容 [英] Regex to match content between div tag

问题描述

大家好



我想获得带有特定类名的div标签之间的内容，并希望将其替换为其他内容。



目前我正在使用以下模式：

Hi All

I want to get content between div tag with specific class name and want to replace it with another content.

Currently I am using following pattern:

string _pattern = @"\s*(.+?)\s*";
string _headPattern = string.Format("<div class=\"headercontent\">{0}</div>", _pattern);

Match _match = Regex.Match(_htmlString, _headPattern, RegexOptions.Multiline);

工作正常如果我在div标签中有以下内容。

Its working fine if I have following content in div tag.

<div class="headercontent">{lastname}</div>

但它没有关注内容。

But it fails for following content.

<div class="headercontent">{firtname}
{lastname}</div>

如果div内容中有新行，则它失败了。



谢谢

Imrankhan

If there is a new line in div content then it fails.

Thanks
Imrankhan

推荐答案

我没有''让你的意图从代码中反映出来。在我看来，就像你以相反的方式使用东西一样，所以我很好奇Match方法如何替换你的东西。



见RegexOptions.Multiline [ ^ ]含义：

I didn''t got your intentions reflecting from the code. It seems to me, like you use things in the opposite way, so I am pretty curious how does the Match method replace something for you.

See RegexOptions.Multiline[^] meaning:

引用：

多线模式。更改^和

的含义，使它们分别在任何行的开头和结尾匹配，而不仅仅是整个字符串的开头和结尾。

so they match at the beginning and end, respectively, of any line, and not just the beginning and end of the entire string.

您需要单行。



请查看以下代码，更通用的解决方案：

You need Singleline instead.

Please look at the following code for a possible, more general solution:

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

class HtmlPatterFiller
{
    Regex re;
    string globalPattern;

    public HtmlPatterFiller(string className)
    {
        globalPattern = String.Format("<div[^>]*?class=([\"'])[^>]*{0}[^>]*\\1[^>]*>(.*?)</div>",className);
        re = new Regex(globalPattern, RegexOptions.Singleline | RegexOptions.Compiled | RegexOptions.IgnoreCase);
    }

    public string Fill(string html, Dictionary<string,string> dictionary)
    {
        return re.Replace(html, delegate(Match m) {
                    var res = m.Value;
                    foreach(var e in dictionary)
                    {
                        res = res.Replace(e.Key, e.Value);
                    }
                    return res;
                   });
    }
}

class Program
{
    public static void Main()
    {
    string input = @"User full name:<div id='d1' class=""c1 c2"">
        Fn:<span class=""fn"">{FirstName}</span><br />
        LN:<span class=""ln"">{LastName}</span>
        </div>";

    var filler = new HtmlPatterFiller("c1");

    var d = new Dictionary<string, string>() { {"{FirstName}", "John"}, {"{LastName}", "Smith"} };

    Console.WriteLine(filler.Fill(input, d));
    }
}

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