Get as string a part of an line from a text

Question

I have some lines of a file and i have to get from it as a string just the firsts characters. The text is:

...
(spaces) UWORD (spaces) /* data */

(spaces) UBYTE (spaces) /* data */
....

I have to get "UWORD" and "UBYTE" and more of that from all lines without any spaces or /*data */

while ((line = Readed.ReadLine()) != null)
{
    if (line.Contains("data") )
    {
             // DO WHAT? 
    }
}

Your question is unclear. Please provide a concrete example with few lines to read and an example of what you expect to get from those lines — Steve, Sep 13 '18 at 06:49
The null is shorthand for all whitespace and maybe some control chars — bommelding, Sep 13 '18 at 06:55
Could you provide an example (several lines of a file), please? — Dmitry Bychenko, Sep 13 '18 at 06:57
@bommelding nice trick. Found it [here](https://stackoverflow.com/a/6111355/5174469) thanx mate :) — Mong Zhu, Sep 13 '18 at 07:04

Mong Zhu · Accepted Answer · 2018-09-13T07:39:22.263

-1

you can use this Split overload with StringSplitOptions.RemoveEmptyEntries. It will:

Splits a string into substrings based on the strings in an array.

in this case split the string by spaces. Now you need to take just the first element:

string input = @"   UWORD     /* data */ ";
string value = input.Split(new string[] {" "}, StringSplitOptions.RemoveEmptyEntries).First();

EDIT: this looks like you are scanning code and retrieve datatype names. In this case you might have not only spaces but also tabs. If this is the case just include also tabs into the string array that holds the delimiters:

string value = input.Split(new string[] {" ", "\t"}, StringSplitOptions.RemoveEmptyEntries).First();

Apparently it is also possible to catch all whitespace characters. Here is the trick to do that:

string value = input.Split(new char[0], StringSplitOptions.RemoveEmptyEntries).First();

edited Sep 13 '18 at 07:39

answered Sep 13 '18 at 06:57

Mong Zhu

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Thanks so much. The last code did the job with the whitespaces characters. The second works too. – Bogdan Bogdan Sep 13 '18 at 07:39
@LunculescuBogdan glad to hear. I though you might encounter also some tabs in there – Mong Zhu Sep 13 '18 at 07:39
if you flag my answer for deletion. Just speak to me with a reasonable argument. I will ask to unaccept my answer and delete it myself. – Mong Zhu Sep 13 '18 at 08:15

Get as string a part of an line from a text

1 Answers1