Need help with manupulating string ( C# Winform )

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Hello,

I have a .txt from which i want to remove the whitespaces and the line breaks. The task that i want to do is remove all the whitespaces and line breaks from the .txt file and parse them as DateTime spilitting it from "-".

The .txt file looks like this < here "*" mean each whitespace>
-------------------------------------
09:00-16:00
***********19:00-23:00
10:00-17:00
***********20:00-24:00
07:00-14:00
************18:00-22:00

04:00-09:00
*************12:00-18:00

04:00-10:00
***********14:00-19:00

05:00-12:00

16:00-20.00

06:00-13:00
***********17:00-21:00
-------------------------------

The result should look like this.
--------------------------------------------
09:00-16:00
19:00-23:00
10:00-17:00
20:00-24:00
07:00-14:00
18:00-22:00
04:00-09:00
12:00-18:00
04:00-10:00
14:00-19:00
05:00-12:00
16:00-20.00
06:00-13:00
17:00-21:00
----------------------------------------------

Actually the data is extracted from internet and the whole code looks like this.

void update()// it extracts data from the website
       {
           HtmlWeb htmlweb = new HtmlWeb();
           HtmlAgilityPack.HtmlDocument document = htmlweb.Load("http://www.myrepublica.com/portal/index.php?action=pages&page_id=8");

           var extracted = document.DocumentNode.Descendants("span").Where(x => x.Attributes.Contains("style"));

           var schedule = "";
           foreach (var link in extracted)
           {
               // Saving the data to a variable
               schedule +="\n" + string.Format("{0}", link.InnerText);
           }

           var new_schedule = "";
           new_schedule = schedule.Substring(schedule.IndexOf("Group 1"), schedule.IndexOf("Substations"));
           label1.Text = new_schedule;


           StreamWriter writer = new StreamWriter("schedule.txt");
           writer.Write(label1.Text);
           writer.Close();
       }


       // button which loads the manipulated data.
       private void btn_load_Click(object sender, EventArgs e)
       {
           List<string> lst_schedule = new List<string>();
           StreamReader reader = new StreamReader("schedule.txt");

           while (reader.ReadLine() !=null)
           {
               lst_schedule.Add(reader.ReadLine());
           }
           reader.Close();
           foreach (string s in lst_schedule)
           {
               s.Replace(" ", string.Empty);
               s.Replace("\n", string.Empty);
               label1.Text += "\n" + s;
           }

Any kind of help is appreciated.

Posted 25-Jan-15 13:18pm

BibhutiAlmighty

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2 solutions

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Peter Leow · Answer 1 · 2015-01-25T13:32:00

Solution 1

Try to adapt this:

C#

using System;
using System.Text.RegularExpressions;
public class Program
{
    public static void Main()
    {
        string input = "09:00-16:00    19:00-23:00     10:00-17:00    20:00-24:00\n07:00-14:00    18:00-22:00    04:00-09:00    12:00-18:00";
        string pattern = "\\s+";
        string replacement = "\n";
        Regex rgx = new Regex(pattern);
        string result = rgx.Replace(input, replacement);
        Console.WriteLine(result);
    }
}

Posted 25-Jan-15 13:32pm

Peter Leow

Comments

BibhutiAlmighty 25-Jan-15 19:43pm

string pattern = "\\s+";

What does this line of code mean ?

Peter Leow 25-Jan-15 21:29pm

in Regex, \s means any whiteapace, + means one or more, while the first \ is just to escape it. Read more: http://www.codeproject.com/Articles/9099/The-Minute-Regex-Tutorial

BillWoodruff 27-Jan-15 3:37am

+5

Peter Leow 27-Jan-15 3:40am

Thank you, BillWoodruff.

TheRealSteveJudge · Answer 2 · 2015-01-25T21:29:00

I assume you want to extract the time values and parse them as DateTime.
The snippet below shows how you could do it:

string pattern = "(?<StartHours>[0-9]{2}):(?<StartMinutes>[0-9]{2})-(?<EndHours>[0-9]{2}):(?<EndMinutes>[0-9]{2})";

Regex regex = new Regex(pattern);

MatchCollection mc = regex.Matches(input);

DateTime now = DateTime.Now;

foreach(Match match in mc)
{
    int startHours = Convert.ToInt32(match.Groups["StartHours"].Value);
    int startMinutes = Convert.ToInt32(match.Groups["StartMinutes"].Value);
    int endHours = Convert.ToInt32(match.Groups["EndHours"].Value);
    int endMinutes = Convert.ToInt32(match.Groups["EndMinutes"].Value);

    DateTime dtStart = new DateTime(now.Year, now.Month, now.Day, startHours, startMinutes, 0);
    DateTime dtEnd = new DateTime(now.Year, now.Month, now.Day, endHours, endMinutes, 0);
}

(input is the content of your .txt file)