Decoding on Base 64 does not consider "Ç"

Question

I have the following code snippets:

window.btoa(CodAcabamento) //Codifica meu código para enviar para a WebApi

string CodAcabamentoDes = Base64Decode(CodAcabamento); //Decodifica meu código para realizar buscas no bd

    public static string Base64Decode(string base64EncodedData)
    {
        var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);
        return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);
    }

But the Base64Decode does not consider the Ç, is problem with the Base I’m using or some other problem?

Example of how this in the Database:

Supplementary information:

It was necessary to use the Base64, due to the fact that I use Route and some code receive /, trouble.

Answer 1

It doesn’t make any sense to use Base64 there. My tip is to rewrite in the right way.

In addition, it is important to understand the cause of the problem. Well, most likely, the representation in Base64 that is coming to the application backend refers to the character ç "encoded" in Windows-1252.

In your code, you assume that the encoding of the string is UTF-8. Hence the problem.

Keep in mind that it makes no sense to have a string not knowing what encoding she uses.

The adaptation of your code to work in this particular case would be something like:

public static string Base64Decode(string base64EncodedData)
{
    var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);

    var enc = Encoding.GetEncoding(1252); // Windows-1252
    return enc.GetString(base64EncodedBytes);
}