这就是我如何在所有的。net程序中替换变音符字符为非变音符字符

C#:

//Transforms the culture of a letter to its equivalent representation in the 0-127 ascii table, such as the letter 'é' is substituted by an 'e'
public string RemoveDiacritics(string s)
{
    string normalizedString = null;
    StringBuilder stringBuilder = new StringBuilder();
    normalizedString = s.Normalize(NormalizationForm.FormD);
    int i = 0;
    char c = '\0';

    for (i = 0; i <= normalizedString.Length - 1; i++)
    {
        c = normalizedString[i];
        if (CharUnicodeInfo.GetUnicodeCategory(c) != UnicodeCategory.NonSpacingMark)
        {
            stringBuilder.Append(c);
        }
    }

    return stringBuilder.ToString().ToLower();
}

VB .NET:

'Transforms the culture of a letter to its equivalent representation in the 0-127 ascii table, such as the letter "é" is substituted by an "e"'
Public Function RemoveDiacritics(ByVal s As String) As String
    Dim normalizedString As String
    Dim stringBuilder As New StringBuilder
    normalizedString = s.Normalize(NormalizationForm.FormD)
    Dim i As Integer
    Dim c As Char

    For i = 0 To normalizedString.Length - 1
        c = normalizedString(i)
        If CharUnicodeInfo.GetUnicodeCategory(c) <> UnicodeCategory.NonSpacingMark Then
            stringBuilder.Append(c)
        End If
    Next
    Return stringBuilder.ToString().ToLower()
End Function

希腊代码页(ISO)可以做到这一点

关于这个代码页的信息在System.Text.Encoding.GetEncodings()中。了解网址:https://msdn.microsoft.com/pt-br/library/system.text.encodinginfo.getencoding(v=vs.110).aspx

希腊语(ISO)的代码页为28597，名称为ISO -8859-7。

进入代码…\ o /

string text = "Você está numa situação lamentável";

string textEncode = System.Web.HttpUtility.UrlEncode(text, Encoding.GetEncoding("iso-8859-7"));
//result: "Voce+esta+numa+situacao+lamentavel"

string textDecode = System.Web.HttpUtility.UrlDecode(textEncode);
//result: "Voce esta numa situacao lamentavel"

那么，写这个函数…

public string RemoveAcentuation(string text)
{
    return
        System.Web.HttpUtility.UrlDecode(
            System.Web.HttpUtility.UrlEncode(
                text, Encoding.GetEncoding("iso-8859-7")));
}

请注意,…Encoding. getencoding ("iso-8859-7")等价于Encoding. getencoding(28597)，因为第一个是Encoding的名称，第二个是Encoding的编码页。

在这里弹出这个库，如果您还没有考虑过的话。看起来有一个完整的单元测试。

https://github.com/thomasgalliker/Diacritics.NET

我没有使用过这种方法，但是Michael Kaplan在他的博客文章(有一个令人困惑的标题)中描述了一种方法，谈论剥离变音符:剥离是一项有趣的工作(又名剥离) 论无意义的意义，即一切 Mn字符是非空格的，但是 有些更非间距比 其他人)

static string RemoveDiacritics(string text) 
{
    var normalizedString = text.Normalize(NormalizationForm.FormD);
    var stringBuilder = new StringBuilder(capacity: normalizedString.Length);

    for (int i = 0; i < normalizedString.Length; i++)
    {
        char c = normalizedString[i];
        var unicodeCategory = CharUnicodeInfo.GetUnicodeCategory(c);
        if (unicodeCategory != UnicodeCategory.NonSpacingMark)
        {
            stringBuilder.Append(c);
        }
    }

    return stringBuilder
        .ToString()
        .Normalize(NormalizationForm.FormC);
}

请注意，这是他之前帖子的后续:剥离变音符....

该方法使用String。Normalize将输入字符串分割为组成符号(基本上是将“基本”字符与变音符符分开)，然后扫描结果并仅保留基本字符。这只是有点复杂，但实际上你看到的是一个复杂的问题。

当然，如果你限制自己使用法语，你可能会使用@David Dibben推荐的如何在c++ std::string中删除重音和波浪号的简单基于表的方法。

如果有人感兴趣，我正在寻找类似的东西，最后写了如下:

public static string NormalizeStringForUrl(string name)
{
    String normalizedString = name.Normalize(NormalizationForm.FormD);
    StringBuilder stringBuilder = new StringBuilder();

    foreach (char c in normalizedString)
    {
        switch (CharUnicodeInfo.GetUnicodeCategory(c))
        {
            case UnicodeCategory.LowercaseLetter:
            case UnicodeCategory.UppercaseLetter:
            case UnicodeCategory.DecimalDigitNumber:
                stringBuilder.Append(c);
                break;
            case UnicodeCategory.SpaceSeparator:
            case UnicodeCategory.ConnectorPunctuation:
            case UnicodeCategory.DashPunctuation:
                stringBuilder.Append('_');
                break;
        }
    }
    string result = stringBuilder.ToString();
    return String.Join("_", result.Split(new char[] { '_' }
        , StringSplitOptions.RemoveEmptyEntries)); // remove duplicate underscores
}

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));
    }
}