Removing escaped non printable characters from JsonString-CodePudding

I'm getting JsonString from client API and there is some non-printable characters(escaped) in that jsonString:

"{\"Name\":\"\\u001f\\u001f!#$%&'%\\u0001\"}"

I need to remove all this \u001f, \u0001 strings from my string

Regex.Replace("{\"Name\":\"\\u001f\\u001f!#$%&'%\\u0001\"}", @"[^\u0020-\u007E]", string.Empty)

I tried all regexes and all sanitize functions, nothing works, nothing can catch those strings...

Maybe I'm doing something wrong and you can help me.

CodePudding user response：

Let's match every \\udddd and analyze the dddd code:

string text = "{\"Name\":\"\\u001f\\u001f!#$%&'%\\u0001\"}";

// {"Name":"!#$%&'%"}
var result = Regex.Replace(text,
  @"\\u(?<value>[0-9A-Fa-f]{4})",
   m => char.IsControl((char) int.Parse(m.Groups["value"].Value, NumberStyles.HexNumber)) 
     ? "" 
     : m.Value);