How do I writte a code in C# for read some words from a file

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1.50/5 (2 votes)

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Hello,
I have to writte a sequence in C#. Dat have to read from a file (does not matter what kind of file), just the words between some ... words.
EX: "ID Config: 1423AAA end config
ID Config: 242gggg end config"
---------
And i have to get just dat "1423AAA", from each line.

The results must be put in one string (I think a loooong string).

Please help me :(

Sry for my english.

What I have tried:

Start with StreamReader sr = new StreamReader(file);
....

and i can't find the condition :(

Posted 28-Aug-18 23:43pm

LRazvan96

Updated 29-Aug-18 1:23am

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3 solutions

Solution 1

You should really be able to find the answer on the Internet, eg,:

c# - Reading a text file word by word - Stack Overflow[^]

Posted 28-Aug-18 23:52pm

Dirk Bahle

Comments

LRazvan96 29-Aug-18 5:57am

But dat numbers will change every time in the file.

Solution 3

If you are a beginner and you are already confused just by using a tool like regex you might want to consider alternative formats like XML. Search for articles on XmlSerializer or DataContractSerializer

- its really easy to read and write Xml in .Net if you take the time to evaluate the option ...

Posted 29-Aug-18 1:24am

Dirk Bahle

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OriginalGriff · Accepted Answer · 2018-08-28T23:57:00

Solution 2

It really depends on how consistent the data is, and if it's repeated.
If your data is always of the form

... ID Config: nnnnaaa end config ...

Then I'd use a regex:

(?<=ID Config:\s+)\w+(?=\s)

Would do it:

C#

private static Regex findID= new Regex(
      "(?<=ID Config:\\s+)\\w+(?=\\s)",
    RegexOptions.Multiline
    | RegexOptions.CultureInvariant
    | RegexOptions.Compiled
    );
...
    MatchCollection ms = findID.Matches(InputText);
    foreach (Match m in ms)
        {
        Console.WriteLine(m.Value);
        }

Posted 28-Aug-18 23:57pm

OriginalGriff

Comments

LRazvan96 29-Aug-18 6:07am

There will be more datas in dat document. Like...

"blabal
ballba bla ba nevermind
ID COnfig: 1243FS end config;
again words..
and again
ID Config: 1241gf end config;
.. "

OriginalGriff 29-Aug-18 6:10am

That's why my "of the form" sample had ellipses ...

Try the Regex code and see what happens!

LRazvan96 29-Aug-18 6:27am

Sry, but i can't figured out without the form :( i am confuzed now , because i never used regex sintax before.

It have to start reading from my file, to take the all strings and put in a string to use it in rest of my program.
Sry for this :(

OriginalGriff 29-Aug-18 6:35am

Oh come on!
You know how to read all the text from a file, yes?

LRazvan96 29-Aug-18 6:43am

I am beginner in this, but nevermind.
It can be easy but i can t figured out.
And i don t know if i have to use File.ReadAllText or a simple instruction.

If it can help...
static void Main(string[] args)
{
StreamReader fin = new StreamReader("D:\\path..);
string line = "";
while ((line = fin.ReadLine()) != null)
{
// and here i don t know
}

OriginalGriff 29-Aug-18 6:51am

Just use ReadAllText - that returns the whole file as a single string. Then feed that into the code I gave you and see what happens.

To be honest, this is basic stuff - if you can't cope with reading a file in half a dozen different ways then you are way out of your depth!

LRazvan96 29-Aug-18 8:21am

Ok, thank you.
You really helped me.
Now.. dat is the right solution for my code:
string text = System.IO.File.ReadAllText(file);
Regex pattern = new Regex("(?<=/Start).*?(End)", RegexOptions.RightToLeft);
MatchCollection allMatches = pattern.Matches(text);

foreach (var m in allMatches)
{
Console.WriteLine(m);
}

LRazvan96 30-Aug-18 1:29am

Ok, sorry for this but i have one more question.
How do I put the our "m" (from allMatches) into a string?
I can't find what kind of oject is allMatches.

OriginalGriff 30-Aug-18 1:49am

The hint is in the code:

MatchCollection allMatches = pattern.Matches(text);

Which makes it a MatchCollection:
https://docs.microsoft.com/en-us/dotnet/api/system.text.regularexpressions.matchcollection?redirectedfrom=MSDN&view=netframework-4.7.2

And m.Value is the string you need, as I showed in the original code...

LRazvan96 13-Sep-18 1:16am

Sry for this question, but i really need your help :(
What is the regex sintax for:
(spaces)(spaces) UWORD (spaces)(spaces) /* data type */
(spaces)(spaces) UBYTE (spaces)(spaces) /* data type */

I need to get UWORD and UBYTE and a lot of that things without spaces and /*data type */

Or where can i find something to help me about this commands.
Thanks a lot.