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Richard Víquez Pérez
Asked: 2020-07-22 13:04:54 +0800 CST 2020-07-22 13:04:54 +0800 CST

How can I convert the encoded characters of a string to a normal string with c#

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I really don't know if it's UTF8 or what, but I'm receiving a json from a server that brings characters like accents and things like that that I want to convert to normal text, some of the fields that json brings are vision, mission and values:

 "mision": "<p>Esta es una visión de prueba de SQL SOftware</p>",

    "vision": "<p>Y esta es la visión</p><span style=\"color:#666666;font-family:arial, sans-serif;font-size:14px;line-height:22px;text-align:justify;background-color:#ffffff;\"></span>",

    "valores": "<p>Descripción<br /></p>",

How can I convert this strangely formatted data to normal text? I tried it this way but it didn't work:

  var deco = Encoding.Default.GetBytes(payload);

                    var json = Encoding.UTF8.GetString(deco);
c#

1 Answers

  1. Best Answer

    .Net framework offers System.Net.WebUtility.HtmlDecodeand System.Web.HttpUtility.HtmlDecodethat you can use for your requirement.

    The result of both methods is the same and the most obvious difference is the availability in the different versions of .Net, the most noticeable being that it WebUtiliyis available for UWP and HttpUtiliynot.

    Take into account the possibility that you have to apply the conversion several times because in your example there are cases where one time will not be enough.

    In the case of the first string ...visión..., the first decode converts it to visiónand the second is that you getvisión

    Below is a segment of the code I used to test

    const string texto = "<p>Esta es una visión de prueba de SQL SOftware</p>";
string decodificado = WebUtility.HtmlDecode(texto);
decodificado = WebUtility.HtmlDecode(decodificado);

    At first glance it seems that decoding 2 times is enough, but I recommend testing with different strings to confirm it.

    If after decoding, you want to remove the HTML elements, Ravi Thapliyal 's answer (from the English site) may be helpful. There it uses a regular expression for that purpose:

    string noHTML = Regex.Replace(decodificado, @"<[^>]+>|&nbsp;", "").Trim();
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