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Asked: 2026-05-23T10:11:10+00:00

I have to develop a program. This is encoding system. I have this Japanese

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I have to develop a program. This is encoding system.

I have this Japanese characters that are:

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 encoding like this:

%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 that?

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1 Answer

  1. Editorial Team

    I believe you are looking for HttpUtility.UrlEncode, can’t figure out the encoding to get exactly the same output that you show.

    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, as you don’t really need to convert Unicode to ASCII, which is impossible. You rather need to Persent encode or URL encode Percent-encoding.

    [EDIT]

    I figured it out:

    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 to the encoding you that 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
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