asp.net-mvc - razor MVC RSS 中的 RegExp 搜索结果区分大小写

Question

我有以下代码用于显示搜索结果。

@foreach (var str in (item.ContentText.Split(new char[] { '?', '<', '!', '<', '^', '>', '*', '>'}).Where(a => a.Contains((string)ViewData["searchTerm"]))))
{
                        @Html.Raw(Regex.Replace(str, (string)ViewData["searchTerm"],
 "<span style='background-color:rgb(245, 234, 157); color:rgb(243, 122, 122)'>" + (string)ViewData["searchTerm"] + "</span>"))
}
                    </a>

razor 中是否有任何 reg exp 可以忽略大小写？

Answer 1

您需要添加的是RegexOptions.IgnoreCase作为 Regex.Replace 的最后一个参数过载:

@foreach (var str in (item.ContentText.Split(new char[] { '?', '<', '!', '<', '^', '>', '*', '>'}).Where(a => a.Contains((string)ViewData["searchTerm"]))))
{
     @Html.Raw(Regex.Replace(str, (string)ViewData["searchTerm"],
               "<span style='background-color:rgb(245, 234, 157); color:rgb(243, 122, 122)'>" + (string)ViewData["searchTerm"] + "</span>",
               RegexOptions.IgnoreCase))
}

Regex.Replace 的默认设置是 RegexOptions.None ，其中包括以下规则(强调区分大小写):

• The pattern is interpreted as a canonical rather than an ECMAScript regular expression.

• The regular expression pattern is matched in the input string from left to right.

• Comparisons are case-sensitive.

• The ^ and $ language elements match the beginning and end of the input string.

• The . language element matches every character except \n.

• Any white space in a regular expression pattern is interpreted as a literal space character.

• The conventions of the current culture are used when comparing the pattern to the input string.

• Capturing groups in the regular expression pattern are implicit as well as explicit.

注意:所有正则表达式选项均由 System.Text.RegularExpressions 命名空间提供，而不是 Razor 引擎本身。