如何使用 Regex 或 StringBuilder 转义外来字符？

发布于 2025-01-18 19:26:41 字数 634 浏览 1 评论 0原文

我有以下清理字符串的方法：

public static String UseStringBuilderWithHashSet(string strIn)
    {
        var hashSet = new HashSet<char>("?&^$#@!()+-,:;<>’\'-_*");
        // specify capacity of StringBuilder to avoid resizing
        StringBuilder sb = new StringBuilder(strIn.Length);
        foreach (char x in strIn.Where(c => !hashSet.Contains(c)))
        {
            sb.Append(x);
        }
        return sb.ToString();
    }

但是，[mv] reolちるちるchiruchiru或[mv] reol reolヒビカセhibikase没有清理。

如何修改我的方法，以便将上述字符串之一变成： [MV] Reol Chiruchiru

原文

I have the following method to clean up strings:

public static String UseStringBuilderWithHashSet(string strIn)
    {
        var hashSet = new HashSet<char>("?&^$#@!()+-,:;<>’\'-_*");
        // specify capacity of StringBuilder to avoid resizing
        StringBuilder sb = new StringBuilder(strIn.Length);
        foreach (char x in strIn.Where(c => !hashSet.Contains(c)))
        {
            sb.Append(x);
        }
        return sb.ToString();
    }

However, strings such as [MV] REOL ちるちる ChiruChiru or [MV] REOL ヒビカセ Hibikase do not get cleaned up.

How can I modify my method so it can turn one of the above strings into for example:
[MV] REOL ChiruChiru

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尸血腥色 2025-01-25 19:26:41

你试图通过过滤掉你不想要的一切来彻底解决这个问题。这不是最佳选择，因为它们有 100,000 多个可能的字符。

如果你只接受你想要的，你可能会找到更好的结果。

public static string CleanInput(string input)
{
    //a-zA-Z allows any English alphabet character upper or lower case
    //\[ and \] allows []
    //\s allows whitespace
    var regex = new Regex(@"[a-zA-Z\[\]\s]");
    var stringBuilder = new StringBuilder(input.Length);
    foreach(char c in input){
        if(regex.IsMatch(c.ToString())){
            stringBuilder.Append(c);
        }
    }
    string output = stringBuilder.ToString();
    //\s+ will match on any duplicate spaces and replace it with
    //a single space.
    return Regex.Replace(output , @"\s+", " ");
}

You're trying to solve this exhaustively by filtering out everything you don't want. This is not optimal as their are 100,000+ possible characters.

You may find better results if you only accept what you do want.

public static string CleanInput(string input)
{
    //a-zA-Z allows any English alphabet character upper or lower case
    //\[ and \] allows []
    //\s allows whitespace
    var regex = new Regex(@"[a-zA-Z\[\]\s]");
    var stringBuilder = new StringBuilder(input.Length);
    foreach(char c in input){
        if(regex.IsMatch(c.ToString())){
            stringBuilder.Append(c);
        }
    }
    string output = stringBuilder.ToString();
    //\s+ will match on any duplicate spaces and replace it with
    //a single space.
    return Regex.Replace(output , @"\s+", " ");
}

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