Convert encoded characters with escape sequence (\u03c1)

VerbatimBOT · February 20th, 2011, 06:45 PM

Hi all,
Does anyone have an idea how do I parse and convert properly character codes like '\u03c1'?
When I hardcode string like:

Code:

string str = "\u03c1";
MessageBox.Show(str);

it works good, but when I receive "\u03c1" as a string (from an input textbox), it treats that escape sequence not as "\u" but as "\\u" so it does not recognizes it.
Any help would be appreciated.

Thanks in advance,
Aleksandar

disel2010 · February 25th, 2011, 09:25 AM

Hi,

I'm not sure what you'r trying to parse/convert...

When I enter the ρ character in a textbox and look at it in Quickwatch the value is 0x03c1 'ρ'.

Only when you past the unicode string as a string in a textbox you will see the text as "\\u03c1"..

VerbatimBOT · February 25th, 2011, 09:30 AM

Hi disel2010,

The thing was I couldn't convert "\\u" character to an actual "\u" char.
For instance, entering "\u03c1" in a TextBox and hardcoding it like string str="\u03c1" is not the same (the second one works as it should be).

But never mind, I found a way:

Code:

 StringBuilder sb = new StringBuilder();
            //string[] array = value.Replace("\\u", "").Split(' ');

            for (int i=0; i<value.Length - 4; i++)
            {
                if (value.Substring(i, 2) == "\\u")
                {
                    sb.Append((char)Int16.Parse(value.Substring(i + 2, 4), System.Globalization.NumberStyles.AllowHexSpecifier));
                    i += 5;
                }
                else
                    sb.Append(value[i]);
            }

            return sb.ToString().Trim();

Thanks for replying though.

All the best

disel2010 · February 25th, 2011, 09:44 AM

Hi,

glad to see you worked it out yourself.

In seeing your code, I believe a CharEnumerator would have been nice too.
Something like this:

Code:

CharEnumerator txtInputEnum = txtBox1.Text.GetEnumerator();
while (txtInputEnum.MoveNext()){
           char c = txtInputEnum.Current;
           if (c.ToString() == "\u03c1")
                sb.Append('X');
            else
                sb.Append(c);
        }

Kind regards