如何从字符串中剥离非ascii字符?(c#)
当前回答
我相信MonsCamus的意思是:
parsememo = Regex.Replace(parsememo, @"[^\u0020-\u007E]", string.Empty);
其他回答
我发现下面稍微改变的范围对于从数据库中解析注释块很有用,这意味着您不必与制表符和转义字符相争斗,这将导致CSV字段变得混乱。
parsememo = Regex.Replace(parsememo, @"[^\u001F-\u007F]", string.Empty);
如果您希望避免使用其他特殊字符或特殊标点符号,请检查ascii表
Necromancing。 此外,bzlm的方法可以用来删除不属于任意字符集的字符,而不仅仅是ASCII:
// https://en.wikipedia.org/wiki/Code_page#EBCDIC-based_code_pages
// https://en.wikipedia.org/wiki/Windows_code_page#East_Asian_multi-byte_code_pages
// https://en.wikipedia.org/wiki/Chinese_character_encoding
System.Text.Encoding encRemoveAllBut = System.Text.Encoding.ASCII;
encRemoveAllBut = System.Text.Encoding.GetEncoding(System.Globalization.CultureInfo.InstalledUICulture.TextInfo.ANSICodePage); // System-encoding
encRemoveAllBut = System.Text.Encoding.GetEncoding(1252); // Western European (iso-8859-1)
encRemoveAllBut = System.Text.Encoding.GetEncoding(1251); // Windows-1251/KOI8-R
encRemoveAllBut = System.Text.Encoding.GetEncoding("ISO-8859-5"); // used by less than 0.1% of websites
encRemoveAllBut = System.Text.Encoding.GetEncoding(37); // IBM EBCDIC US-Canada
encRemoveAllBut = System.Text.Encoding.GetEncoding(500); // IBM EBCDIC Latin 1
encRemoveAllBut = System.Text.Encoding.GetEncoding(936); // Chinese Simplified
encRemoveAllBut = System.Text.Encoding.GetEncoding(950); // Chinese Traditional
encRemoveAllBut = System.Text.Encoding.ASCII; // putting ASCII again, as to answer the question
// https://stackoverflow.com/questions/123336/how-can-you-strip-non-ascii-characters-from-a-string-in-c
string inputString = "RäksmörПривет, мирgås";
string asAscii = encRemoveAllBut.GetString(
System.Text.Encoding.Convert(
System.Text.Encoding.UTF8,
System.Text.Encoding.GetEncoding(
encRemoveAllBut.CodePage,
new System.Text.EncoderReplacementFallback(string.Empty),
new System.Text.DecoderExceptionFallback()
),
System.Text.Encoding.UTF8.GetBytes(inputString)
)
);
System.Console.WriteLine(asAscii);
对于那些只想消除口音的人来说: (注意,因为正常化!=拉丁化!=罗马化)
// string str = Latinize("(æøå âôû?aè");
public static string Latinize(string stIn)
{
// Special treatment for German Umlauts
stIn = stIn.Replace("ä", "ae");
stIn = stIn.Replace("ö", "oe");
stIn = stIn.Replace("ü", "ue");
stIn = stIn.Replace("Ä", "Ae");
stIn = stIn.Replace("Ö", "Oe");
stIn = stIn.Replace("Ü", "Ue");
// End special treatment for German Umlauts
string stFormD = stIn.Normalize(System.Text.NormalizationForm.FormD);
System.Text.StringBuilder sb = new System.Text.StringBuilder();
for (int ich = 0; ich < stFormD.Length; ich++)
{
System.Globalization.UnicodeCategory uc = System.Globalization.CharUnicodeInfo.GetUnicodeCategory(stFormD[ich]);
if (uc != System.Globalization.UnicodeCategory.NonSpacingMark)
{
sb.Append(stFormD[ich]);
} // End if (uc != System.Globalization.UnicodeCategory.NonSpacingMark)
} // Next ich
//return (sb.ToString().Normalize(System.Text.NormalizationForm.FormC));
return (sb.ToString().Normalize(System.Text.NormalizationForm.FormKC));
} // End Function Latinize
我用了这个正则表达式:
string s = "søme string";
Regex regex = new Regex(@"[^a-zA-Z0-9\s]", (RegexOptions)0);
return regex.Replace(s, "");
我使用这个正则表达式来过滤掉文件名中的坏字符。
Regex.Replace(directory, "[^a-zA-Z0-9\\:_\- ]", "")
这应该是文件名所允许的所有字符。
我相信MonsCamus的意思是:
parsememo = Regex.Replace(parsememo, @"[^\u0020-\u007E]", string.Empty);
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