我试图转换一些字符串，在法国加拿大，基本上，我想能够拿出法国重音标记在字母，同时保持字母。(例如，将é转换为e，那么crème brûlée就会变成creme brulee)
实现这一目标的最佳方法是什么?
当前回答
你可以从MMLib中使用字符串扩展。扩展nuget包:
using MMLib.RapidPrototyping.Generators;
public void ExtensionsExample()
{
string target = "aácčeéií";
Assert.AreEqual("aacceeii", target.RemoveDiacritics());
}
Nuget页面:https://www.nuget.org/packages/MMLib.Extensions/ Codeplex项目网站https://mmlib.codeplex.com/
其他回答
我经常使用基于我在这里找到的另一个版本的扩展方法 (参见在c# (ascii)中替换字符) 简单解释一下:
归一化形成D，将è等字符分割为e和非空格' 由此，nospacing字符被移除 结果归一化回形式C(我不确定这是否有必要)
代码:
using System.Linq;
using System.Text;
using System.Globalization;
// namespace here
public static class Utility
{
public static string RemoveDiacritics(this string str)
{
if (null == str) return null;
var chars =
from c in str.Normalize(NormalizationForm.FormD).ToCharArray()
let uc = CharUnicodeInfo.GetUnicodeCategory(c)
where uc != UnicodeCategory.NonSpacingMark
select c;
var cleanStr = new string(chars.ToArray()).Normalize(NormalizationForm.FormC);
return cleanStr;
}
// or, alternatively
public static string RemoveDiacritics2(this string str)
{
if (null == str) return null;
var chars = str
.Normalize(NormalizationForm.FormD)
.ToCharArray()
.Where(c=> CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)
.ToArray();
return new string(chars).Normalize(NormalizationForm.FormC);
}
}
c#字符串扩展方法
我认为保留字符串含义的最佳解决方案是转换字符，而不是剥离它们，示例crème brûlée很好地说明了这一点，即crme brle vs. creme brulee。
我查看了上面Alexander的评论，看到了Lucene。Net代码是Apache 2.0许可的，因此我将该类修改为一个简单的字符串扩展方法。你可以这样使用它:
var originalString = "crème brûlée";
var maxLength = originalString.Length; // limit output length as necessary
var foldedString = originalString.FoldToASCII(maxLength);
// "creme brulee"
这个函数太长了，不能在StackOverflow的答案中发布(~139k字符的30k允许lol)，所以我做了一个要点，并将作者的名字归为:
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/// <summary>
/// This class converts alphabetic, numeric, and symbolic Unicode characters
/// which are not in the first 127 ASCII characters (the "Basic Latin" Unicode
/// block) into their ASCII equivalents, if one exists.
/// <para/>
/// Characters from the following Unicode blocks are converted; however, only
/// those characters with reasonable ASCII alternatives are converted:
///
/// <ul>
/// <item><description>C1 Controls and Latin-1 Supplement: <a href="http://www.unicode.org/charts/PDF/U0080.pdf">http://www.unicode.org/charts/PDF/U0080.pdf</a></description></item>
/// <item><description>Latin Extended-A: <a href="http://www.unicode.org/charts/PDF/U0100.pdf">http://www.unicode.org/charts/PDF/U0100.pdf</a></description></item>
/// <item><description>Latin Extended-B: <a href="http://www.unicode.org/charts/PDF/U0180.pdf">http://www.unicode.org/charts/PDF/U0180.pdf</a></description></item>
/// <item><description>Latin Extended Additional: <a href="http://www.unicode.org/charts/PDF/U1E00.pdf">http://www.unicode.org/charts/PDF/U1E00.pdf</a></description></item>
/// <item><description>Latin Extended-C: <a href="http://www.unicode.org/charts/PDF/U2C60.pdf">http://www.unicode.org/charts/PDF/U2C60.pdf</a></description></item>
/// <item><description>Latin Extended-D: <a href="http://www.unicode.org/charts/PDF/UA720.pdf">http://www.unicode.org/charts/PDF/UA720.pdf</a></description></item>
/// <item><description>IPA Extensions: <a href="http://www.unicode.org/charts/PDF/U0250.pdf">http://www.unicode.org/charts/PDF/U0250.pdf</a></description></item>
/// <item><description>Phonetic Extensions: <a href="http://www.unicode.org/charts/PDF/U1D00.pdf">http://www.unicode.org/charts/PDF/U1D00.pdf</a></description></item>
/// <item><description>Phonetic Extensions Supplement: <a href="http://www.unicode.org/charts/PDF/U1D80.pdf">http://www.unicode.org/charts/PDF/U1D80.pdf</a></description></item>
/// <item><description>General Punctuation: <a href="http://www.unicode.org/charts/PDF/U2000.pdf">http://www.unicode.org/charts/PDF/U2000.pdf</a></description></item>
/// <item><description>Superscripts and Subscripts: <a href="http://www.unicode.org/charts/PDF/U2070.pdf">http://www.unicode.org/charts/PDF/U2070.pdf</a></description></item>
/// <item><description>Enclosed Alphanumerics: <a href="http://www.unicode.org/charts/PDF/U2460.pdf">http://www.unicode.org/charts/PDF/U2460.pdf</a></description></item>
/// <item><description>Dingbats: <a href="http://www.unicode.org/charts/PDF/U2700.pdf">http://www.unicode.org/charts/PDF/U2700.pdf</a></description></item>
/// <item><description>Supplemental Punctuation: <a href="http://www.unicode.org/charts/PDF/U2E00.pdf">http://www.unicode.org/charts/PDF/U2E00.pdf</a></description></item>
/// <item><description>Alphabetic Presentation Forms: <a href="http://www.unicode.org/charts/PDF/UFB00.pdf">http://www.unicode.org/charts/PDF/UFB00.pdf</a></description></item>
/// <item><description>Halfwidth and Fullwidth Forms: <a href="http://www.unicode.org/charts/PDF/UFF00.pdf">http://www.unicode.org/charts/PDF/UFF00.pdf</a></description></item>
/// </ul>
/// <para/>
/// See: <a href="http://en.wikipedia.org/wiki/Latin_characters_in_Unicode">http://en.wikipedia.org/wiki/Latin_characters_in_Unicode</a>
/// <para/>
/// For example, '&agrave;' will be replaced by 'a'.
/// </summary>
public static partial class StringExtensions
{
/// <summary>
/// Converts characters above ASCII to their ASCII equivalents. For example,
/// accents are removed from accented characters.
/// </summary>
/// <param name="input"> The string of characters to fold </param>
/// <param name="length"> The length of the folded return string </param>
/// <returns> length of output </returns>
public static string FoldToASCII(this string input, int? length = null)
{
// See https://gist.github.com/andyraddatz/e6a396fb91856174d4e3f1bf2e10951c
}
}
希望这能帮助到其他人，这是我发现的最强大的解决方案!
我需要一些东西，转换所有主要的unicode字符和投票的答案留下了一些，所以我已经创建了一个CodeIgniter的convert_accented_characters($str)的版本为c#，很容易自定义:
using System;
using System.Text;
using System.Collections.Generic;
public static class Strings
{
static Dictionary<string, string> foreign_characters = new Dictionary<string, string>
{
{ "äæǽ", "ae" },
{ "öœ", "oe" },
{ "ü", "ue" },
{ "Ä", "Ae" },
{ "Ü", "Ue" },
{ "Ö", "Oe" },
{ "ÀÁÂÃÄÅǺĀĂĄǍΑΆẢẠẦẪẨẬẰẮẴẲẶА", "A" },
{ "àáâãåǻāăąǎªαάảạầấẫẩậằắẵẳặа", "a" },
{ "Б", "B" },
{ "б", "b" },
{ "ÇĆĈĊČ", "C" },
{ "çćĉċč", "c" },
{ "Д", "D" },
{ "д", "d" },
{ "ÐĎĐΔ", "Dj" },
{ "ðďđδ", "dj" },
{ "ÈÉÊËĒĔĖĘĚΕΈẼẺẸỀẾỄỂỆЕЭ", "E" },
{ "èéêëēĕėęěέεẽẻẹềếễểệеэ", "e" },
{ "Ф", "F" },
{ "ф", "f" },
{ "ĜĞĠĢΓГҐ", "G" },
{ "ĝğġģγгґ", "g" },
{ "ĤĦ", "H" },
{ "ĥħ", "h" },
{ "ÌÍÎÏĨĪĬǏĮİΗΉΊΙΪỈỊИЫ", "I" },
{ "ìíîïĩīĭǐįıηήίιϊỉịиыї", "i" },
{ "Ĵ", "J" },
{ "ĵ", "j" },
{ "ĶΚК", "K" },
{ "ķκк", "k" },
{ "ĹĻĽĿŁΛЛ", "L" },
{ "ĺļľŀłλл", "l" },
{ "М", "M" },
{ "м", "m" },
{ "ÑŃŅŇΝН", "N" },
{ "ñńņňʼnνн", "n" },
{ "ÒÓÔÕŌŎǑŐƠØǾΟΌΩΏỎỌỒỐỖỔỘỜỚỠỞỢО", "O" },
{ "òóôõōŏǒőơøǿºοόωώỏọồốỗổộờớỡởợо", "o" },
{ "П", "P" },
{ "п", "p" },
{ "ŔŖŘΡР", "R" },
{ "ŕŗřρр", "r" },
{ "ŚŜŞȘŠΣС", "S" },
{ "śŝşșšſσςс", "s" },
{ "ȚŢŤŦτТ", "T" },
{ "țţťŧт", "t" },
{ "ÙÚÛŨŪŬŮŰŲƯǓǕǗǙǛŨỦỤỪỨỮỬỰУ", "U" },
{ "ùúûũūŭůűųưǔǖǘǚǜυύϋủụừứữửựу", "u" },
{ "ÝŸŶΥΎΫỲỸỶỴЙ", "Y" },
{ "ýÿŷỳỹỷỵй", "y" },
{ "В", "V" },
{ "в", "v" },
{ "Ŵ", "W" },
{ "ŵ", "w" },
{ "ŹŻŽΖЗ", "Z" },
{ "źżžζз", "z" },
{ "ÆǼ", "AE" },
{ "ß", "ss" },
{ "IJ", "IJ" },
{ "ij", "ij" },
{ "Œ", "OE" },
{ "ƒ", "f" },
{ "ξ", "ks" },
{ "π", "p" },
{ "β", "v" },
{ "μ", "m" },
{ "ψ", "ps" },
{ "Ё", "Yo" },
{ "ё", "yo" },
{ "Є", "Ye" },
{ "є", "ye" },
{ "Ї", "Yi" },
{ "Ж", "Zh" },
{ "ж", "zh" },
{ "Х", "Kh" },
{ "х", "kh" },
{ "Ц", "Ts" },
{ "ц", "ts" },
{ "Ч", "Ch" },
{ "ч", "ch" },
{ "Ш", "Sh" },
{ "ш", "sh" },
{ "Щ", "Shch" },
{ "щ", "shch" },
{ "ЪъЬь", "" },
{ "Ю", "Yu" },
{ "ю", "yu" },
{ "Я", "Ya" },
{ "я", "ya" },
};
public static char RemoveDiacritics(this char c){
foreach(KeyValuePair<string, string> entry in foreign_characters)
{
if(entry.Key.IndexOf (c) != -1)
{
return entry.Value[0];
}
}
return c;
}
public static string RemoveDiacritics(this string s)
{
//StringBuilder sb = new StringBuilder ();
string text = "";
foreach (char c in s)
{
int len = text.Length;
foreach(KeyValuePair<string, string> entry in foreign_characters)
{
if(entry.Key.IndexOf (c) != -1)
{
text += entry.Value;
break;
}
}
if (len == text.Length) {
text += c;
}
}
return text;
}
}
使用
// for strings
"crème brûlée".RemoveDiacritics (); // creme brulee
// for chars
"Ã"[0].RemoveDiacritics (); // A
你可以从MMLib中使用字符串扩展。扩展nuget包:
using MMLib.RapidPrototyping.Generators;
public void ExtensionsExample()
{
string target = "aácčeéií";
Assert.AreEqual("aacceeii", target.RemoveDiacritics());
}
Nuget页面:https://www.nuget.org/packages/MMLib.Extensions/ Codeplex项目网站https://mmlib.codeplex.com/
我真的很喜欢azrafe7提供的简洁实用的代码。 所以，我稍微改变了一下，把它转换成一个扩展方法:
public static class StringExtensions
{
public static string RemoveDiacritics(this string text)
{
const string SINGLEBYTE_LATIN_ASCII_ENCODING = "ISO-8859-8";
if (string.IsNullOrEmpty(text))
{
return string.Empty;
}
return Encoding.ASCII.GetString(
Encoding.GetEncoding(SINGLEBYTE_LATIN_ASCII_ENCODING).GetBytes(text));
}
}
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