在给定字符串中找到所有匹配搜索字符串的索引，然后插入一个新单词

Question

我有一个字符串，例如：

为了减少每天的香烟消费量，德里大学的学生 Vineet 已经开始抽更长的香烟。香烟对健康有不良影响

必须找到香烟的出现并在其前插入<span style='color: red;'> 以突出显示？

string search = "cigaret";
string lbltxt = Label1.Text;

int startIndex = Label1.Text.IndexOf(search,StringComparison.CurrentCultureIgnoreCase);
int endIndex = Label1.Text.IndexOf(search,StringComparison.CurrentCultureIgnoreCase) +  (search.Length);
Label1.Text = Label1.Text.Insert(endIndex, "</span>");
Label1.Text = Label1.Text.Insert(findIndex, "<span style='color: red;'>");

这段代码只找到第一次出现并在原始字符串中只突出显示一次而不是三次。

Answer 1

使用这个 JQUERY

   $("p").html(function(index, value) {
    return value.replace(/\b(cigarette)\b/g, '<strong class="test">$1</strong>');
});

还有一个CSS

   .test {
    color: #ff0000;
}

通过这个小提琴 http://jsfiddle.net/EGtBy/218/

我认为这是一种既简单又安全的工作方式。

您可以对区分大小写的字词使用相同的词。我想你现在可以管理了。或者需要任何帮助，然后发表评论。

Answer 2

如果你真的需要做那个“丑陋的替换”，请使用String.Replace（我认为以这种方式添加样式是一种不好的做法）：

string search = "cigarette";
string replacement = "<span style='color: red;'>cigarette</span>";
string sentence = "In an out of the box way to reduce number of cigarette consumption per day, Vineet, a Delhi University student has started smoking longer cigarettes. Cigarettes have a bad influence on health";
string newStr = sentence.Replace(search,replacement);

Answer 3

你可以这样替换单词：

string search = "cigaret";
Label1.Text = Label1.Text.Replace(search, "<span style='color: red;'>" + search + "</span>");

Answer 4

您好，最后这是一个工作代码，但我确信可能有更好的方法来做到这一点。如果有人可以即兴发挥，不胜感激。

    string msg = Label1.Text;

    string search = "cigarette";
    int searchStringLength  = search.Length;

    string startTag = "<span style='color: red;'>";
    string endTag = "</span>";
    int skip = startTag.Length + endTag.Length;

    int msgindex = 0;


    do
    {
        msgindex = msg.IndexOf(search, msgindex, StringComparison.OrdinalIgnoreCase);
        if (msgindex == -1) break;

        msg= msg.Insert((msgindex + searchStringLength), endTag);
        msg = msg.Insert(msgindex, startTag);


        msgindex += searchStringLength + skip;

    } while (msgindex != -1);

    Label1.Text = msg;

Answer 5

我会做这样的事情。不确定它将如何影响格式（除非格式的 HTML）。

        StringBuilder final = new StringBuilder();
        foreach (string split in Label1.Text.Split(' '))
        {
            if (Regex.Match(split, "[a-zA-Z]+").Value.Equals("cigarettes", StringComparison.CurrentCultureIgnoreCase))
            {
                final.Append(@"<span style='color: red;'>");
                final.Append(split);
                final.Append(@"</span>");
            }
            else
            {
                final.Append(split);
            }
            final.Append(' ');
        }
        Label1.Text = final.ToString().Trim();

结果：

In an out of the box way to reduce number of cigarette consumption per day, Vineet, a Delhi University student has started smoking longer <span style='color: red;'>cigarettes.</span> <span style='color: red;'>Cigarettes</span> have a bad influence on health

更新：

抱歉，您不必执行正则表达式。我发现 CultureInfo 有一个 CompareInfo 属性，可以像忽略大小写 Contains() 方法一样工作：

    static void Main(string[] args)
    {
        string yourstring = @"In an out of the box way to reduce number of cigarette consumption per day, Vineet, a Delhi University student has started smoking longer cigarettes. Cigarettes have a bad influence on health";
        StringBuilder final = new StringBuilder();
        CultureInfo culture = CultureInfo.CurrentCulture;
        foreach (string split in yourstring.Split(' '))
        {
            if (culture.CompareInfo.IndexOf(split,"cigarette",CompareOptions.IgnoreCase)!=-1)
            {
                final.Append(@"<span style='color: red;'>");
                final.Append(split);
                final.Append(@"</span>");
            }
            else
            {
                final.Append(split);
            }
            final.Append(' ');
        }
Label1.Text = final.ToString().Trim();
    }

结果：

In an out of the box way to reduce number of <span style='color: red;'>cigarette</span> consumption per day, Vineet, a Delhi University student has started smoking longer <span style='color: red;'>cigarettes.</span> <span style='color: red;'>Cigarettes</span> have a bad influence on health

感谢您的尝试。这个解决方案的唯一问题是，它也 突出显示不在搜索字符串中的字母。自从我 暂时有一个带有索引的解决方案。

显然这就是你想要的：

Label1.Text = Regex.Replace(Label1.Text, @"(cigarette)", @"<span style='color: red;'>$1</span>", RegexOptions.IgnoreCase);

输出是：

In an out of the box way to reduce number of <span style='color: red;'>cigarette</span> consumption per day, Vineet, a Delhi University student has started smoking longer <span style='color: red;'>cigarette</span>s. <span style='color: red;'>Cigarette</span>s have a bad influence on health