How to encode Japanese characters

Question

I need to develop a program. This is a coding system.

I have Japanese characters that:

つ れ づ れ な る ま ゝ に, 日暮 ら し, 硯 に む か ひ て, 心 に う つ り ゆ く よ し な し 事 を, そ こ は か と な く 書 き つ く れ ば, あや し う こ そ も の ぐ る ほ し け れ

I want to convert this string to an encoding as follows:

% 26% 2312388% 3B% 26% 2312428% 3B% 26% 2312389% 3B% 26% 2312428% 3B% 26% 2312394% 3B% 26% 2312427% 3B% 26% 2312414% 3B% 26% 2312445% 3B% 26 % 2312395% 3B% 26% 2312289% 3B% 26% 2326085% 3B% 26% 2326286% 3B% 26% 2312425% 3B% 26% 2312375% 3B% 26% 2312289% 3B% 26% 2330831% 3B% 26% 2312395 % 3B% 26% 2312416% 3B% 26% 2312363% 3B% 26% 2312402% 3B% 26% 2312390% 3B% 26% 2312289% 3B% 26% 2324515% 3B% 26% 2312395% 3B% 26% 2312358% 3B % 26% 2312388% 3B% 26% 2312426% 3B% 26% 2312422% 3B% 26% 2312367% 3B% 26% 2312424% 3B% 26% 2312375% 3B% 26% 2312394% 3B% 26% 2312375% 3B% 26 % 2320107% 3B% 26% 2312434% 3B% 26% 2312289% 3B% 26% 2312381% 3B% 26% 2312371% 3B% 26% 2312399% 3B% 26% 2312363% 3B% 26% 2312392% 3B% 26% 2312394 % 3B% 26% 2312367% 3B% 26% 2326360% 3B% 26% 2312365% 3B% 26% 2312388% 3B% 26% 2312367% 3B% 26% 2312428% 3B% 26% 2312400% 3B% 26% 2312289% 3B % 26% 2312354% 3B% 26% 2312420% 3B% 26% 2312375% 3B% 26% 2312358% 3B% 26% 2312371% 3B% 26% 2312381% 3B% 26% 2312418% 3B% 26% 2312398% 3B% 26 % 2312368% 3B% 26% 2312427% 3B% 26% 2312411% 3B% 26% 2312375% 3B% 26% 2312369% 3B% 26% 2312428% 3B% 26% 2312290% 3B.

How can i do this?

Answer 1

I believe that you are looking for HttpUtility.UrlEncode , cannot calculate the encoding to get exactly the same output that you are showing.

 var testString = "つれづれなるまゝに、日暮らし、硯にむかひて、心にうつりゆくよしなし事を、そこはかとなく書きつくれば、あやしうこそものぐるほしけれ。"; var encodedUrl = HttpUtility.UrlEncode(testString, Encoding.UTF8); 

You might want to change your question, since you do not need to convert Unicode to ASCII, which is not possible. You will probably need Persent encoding or Percent-encoding URL code.

[EDIT]

I understood:

 var testString = "つれづれなるまゝに、日暮らし、硯にむかひて、心にうつりゆくよしなし事を、そこはかとなく書きつくれば、あやしうこそものぐるほしけれ。"; var htmlEncoded = string.Concat(testString.Select(arg => string.Format("&#{0};", (int)arg))); var result = HttpUtility.UrlEncode(htmlEncoded); 

The result will exactly match the encoding you provided. Step by step:

 var inputChar = 'つ'; var charValue = (int)inputChar; // 12388 var htmlEncoded = "&#" + charValue + ";"; // つ var ulrEncoded = HttpUtility.UrlEncode(htmlEncoded); // %26%2312388%3b 

Answer 2

It's impossible. Unicode is much larger than ASCII, and you cannot search every character from Unicode to ASCII. while ASCII has only 256 characters (with control characters), Unicode has tens of thousands (I think).

Answer 3

Here is a function that works:

 public static string UrlDoubleEncode(string text) { if (text == null) return null; StringBuilder sb = new StringBuilder(); foreach (int i in text) { sb.Append('&'); sb.Append('#'); sb.Append(i); sb.Append(';'); } return HttpUtility.UrlEncode(sb.ToString()); }