在 html 文件中将阿拉伯数字转换为阿拉伯/波斯数字 [英] Converting Arabic numerals to Arabic/Persian numbers in html file
问题描述
我正在尝试将纯文本阿拉伯数字转换为东阿拉伯数字.所以基本上把 1 2 3... 转换成 ١ ٢ ٣ ....该函数转换所有数字，包括标签中包含的任何数字，即H1.
I am trying to convert the plain text Arabic Numerals into Eastern Arabic digits. So basically taking 1 2 3... and converting them into ١ ٢ ٣.... The function converts all numbers, including any numbers contained within tags, i.e. H1.
private void LoadHtmlFile(object sender, EventArgs e)
{
var htmlfile = "<html><body><h1>i was born in 1988</h1></body></html>".ToArabicNumber(); ;
webBrowser1.DocumentText=htmlfile;
}
}
public static class StringHelper
{
public static string ToArabicNumber(this string str)
{
if (string.IsNullOrEmpty(str)) return "";
char[] chars;
chars = str.ToCharArray();
for (int i = 0; i < str.Length; i++)
{
if (str[i] >= '0' && str[i] <= '9')
{
chars[i] += (char)1728;
}
}
return new string(chars);
}
}
我也尝试过只针对 InnerText 中的数字，但它也没有奏效.下面的代码也会更改标签编号.
I also tried targeting only numbers in InnerText, but it also did not work. The code below changes tag numbers as well.
private void LoadHtmlFile(object sender, EventArgs e)
{
var htmlfile = "<html><body><h1>i was born in 1988</h1></body></html>" ;
webBrowser1.DocumentText=htmlfile;
}
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
webBrowser1.Document.Body.InnerText = webBrowser1.Document.Body.InnerText.ToArabicNumber();
}
有什么建议吗?
推荐答案
您可以使用正则表达式来查找 HTML 中>"之间的部分和 '<'字符，并对它们进行操作.这将阻止代码处理标签名称和属性(样式等).
You can use a regular expression to find the parts of the HTML that are between '>' and '<' characters, and operate on those. This will prevent the code from processing the tag names and attributes (style, etc).
// Convert all English digits in a string to Arabic digit equivalents
public static string ToArabicNums(string src)
{
const string digits = "۰۱۲۳۴۵۶۷۸۹";
return string.Join("",
src.Select(c => c >= '0' && c <= '9' ? digits[((int)c - (int)'0')] : c)
);
}
// Convert all English digits in the text segments of an HTML
// document to Arabic digit equivalents
public static string ToArabicNumsHtml(string src)
{
string res = src;
Regex re = new Regex(@">(.*?)<");
// get Regex matches
MatchCollection matches = re.Matches(res);
// process in reverse in case transformation function returns
// a string of a different length
for (int i = matches.Count - 1; i >= 0; --i)
{
Match nxt = matches[i];
if (nxt.Groups.Count == 2 && nxt.Groups[1].Length > 0)
{
Group g = nxt.Groups[1];
res = res.Substring(0, g.Index) + ToArabicNums(g.Value) +
res.Substring(g.Index + g.Length);
}
return res;
}
这并不完美，因为它根本不检查标签之外的 HTML 字符说明符，例如结构 &#<digits>; (&;#1777; for ۱, etc)通过Unicode值指定一个字符，并将替换这些中的数字.它也不会处理第一个标签之前或最后一个标签之后的任何额外文本.
This isn't perfect, since it doesn't check at all for HTML character specifiers outside of the tags, such as the construct &#<digits>; (۱ for ۱, etc)to specify a character by Unicode value, and will replace the digits in these. It also won't process any extra text before the first tag or after the last tag.
示例:
Calling: ToArabicNumsHtml("<html><body><h1>I was born in 1988</h1></body></html>")
Result: "<html><body><h1>I was born in ۱۹۸۸</h1></body></html>"
在 ToArabicNums 中使用您喜欢的任何代码来进行实际转换，或通过传入转换函数对其进行概括.
Use whatever code you prefer in ToArabicNums to do the actual transformation, or generalize it by passing in a transformation function.
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