Convert text entered by user containing with escape sequence to string

Question

In textbox1 user enters string "Test\u0021Test" and I would like to convert escaped character "\u0021" to "!"

string x = "Test\u0021Test"; // this is easy
string y = textbox1.Text; // here textbox1.Text = "Test\u0021Test" and this I don't know how to convert

Thanks for help

EDIT Answered by @Simo Erkinheimo Allow user to enter escape characters in a TextBox

\u0021 is only example. User can put any unicode character with \u — kurin123, Oct 13 '16 at 09:08
[Allow user to enter escape characters in a TextBox](http://stackoverflow.com/questions/26150970/allow-user-to-enter-escape-characters-in-a-textbox) — Simo Erkinheimo, Oct 13 '16 at 09:08
@Simo Erkinheimo, please add it as answer, this solve my problem and from my point of view it is most readable solution — kurin123, Oct 13 '16 at 09:17
@kurin123 Flagged as dublicate so someone with more rep can close this. — Simo Erkinheimo, Oct 13 '16 at 09:21

score 1 · Answer 1 · answered Oct 13 '16 at 09:04

1

Use string Replace method this case

string x = "Test\u0021Test"; // this is easy
string y = textbox1.Text.Replace("\u0021", "!");

answered Oct 13 '16 at 09:04

Mostafiz

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\u0021 is just example, I don't know what escape character he will put in – kurin123 Oct 13 '16 at 09:07
so what will be the criteria or patter after escape character ? when the pattern end ? – Mostafiz Oct 13 '16 at 09:08

score 1 · Answer 2 · answered Oct 13 '16 at 09:07

You can do something like this. It will work for all unicode escaped symbols in input string.

var result = Regex.Replace(x, @"\\[u]([0-9a-f]{4})",
match => char.ToString(
    (char)ushort.Parse(match.Groups[1].Value, NumberStyles.AllowHexSpecifier)));

Convert text entered by user containing with escape sequence to string

2 Answers2