[Tips] How to encode and decode unicode escape C# character

What's unicode escape C# character?
That same as below character.

"\ud83c\udf1f[C\u1eadp Nh\u1eadt"

You'll always meet this character when you dump or get data from website. The data send from server to web through JSON file

"Convert a Unicode string to an escaped ASCII string"

This tips will help you Encode and Decode unicode escape C# character! Follow my source code, you can easy do it!

// unicode escape C#

string unicodeString = "\ud83c\udf1f[C\u1eadp Nh\u1eadt";
 
Console.WriteLine(unicodeString);
 
Console.WriteLine(" -------------------------------------------- ");
string encoded = EncodeNonAsciiCharacters(unicodeString);
Console.WriteLine(encoded);
 
Console.WriteLine(" -------------------------------------------- ");
string decoded = DecodeEncodedNonAsciiCharacters(encoded);
Console.WriteLine(decoded);


  
static string EncodeNonAsciiCharacters(string value)
{
    StringBuilder sb = new StringBuilder();
    foreach (char c in value)
    {
        if (c > 127)
        {
            // This character is too big for ASCII
            string encodedValue = "\\u" + ((int)c).ToString("x4");
            sb.Append(encodedValue);
        }
        else
        {
            sb.Append(c);
        }
    }
    return sb.ToString();
}
 
static string DecodeEncodedNonAsciiCharacters(string value)
{
    return Regex.Replace(
           value,
           @"\\u(?<Value>[a-zA-Z0-9]{4})",
           m =>
           {
return ((char)int.Parse(m.Groups["Value"].Value, NumberStyles.HexNumber)).ToString();
           });
}

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