C#

Regex findEm = new Regex(@"(?<=Sample)(?<SampleNo>\d+)(?<Start>\[)(?<Data>.*?)(?<End>\])");
string input = "Sample1[Model:M1; Year:1990]";
Match m = findEm.Match(input);
if (m.Success)
    {
    Console.WriteLine("Sample {0}: {1}{2}{3}\n       {4}, {5}",
                        m.Groups["SampleNo"].Value,
                        m.Groups["Start"].Value,
                        m.Groups["Data"].Value,
                        m.Groups["End"].Value,
                        m.Groups["Start"].Index,
                        m.Groups["End"].Index);
    }

Sample 1: [Model:M1; Year:1990]
       7, 27

public static string BetweenChars(this string text, char left, char right)
{
    string result = string.Empty;
    int leftPos = text.IndexOf(left, 0)+1;
    int rightPos = text.LastIndexOf(right);
    if (leftPos >= 0 && rightPos > leftPos)
    {
        result = text.Substring(leftPos, rightPos - leftPos);
    }
    return result;
}

public static void DelimiterPos(this string text, char left, char right, out int leftPos, out int rightPos)
{
    string result = string.Empty;
    leftPos = text.IndexOf(left, 0);
    rightPos = text.LastIndexOf(right);
}

if (textBox1.TextLength == 3)
{
textBox2.Focus();
}
if (textBox2.TextLength == 3)
{
textBox1.Focus();
}

//check if length is 3 for both textboxes before checking equality.
if(textbox1.TextLength == 3 && textbox2.TextLength == 3){
if (textBox1.Text == textBox2.Text)
{
textBox3.Text = "PASSED";
textBox1.Clear();
textBox2.Clear();
textBox1.Focus();
}
if (textBox1.Text != textBox2.Text)
{
textBox3.Text = "FAILED";
}
}

Quote:

BTW, I cant use btnclick event.

public static class Patterns
{
    public static IEnumerable<string> GroupPatterns(this string pattern)
    {
        char prev = '\0';
        char[] item = new char[pattern.Length];
        int itemIndex = 0;
        
        foreach (char c in pattern)
        {
            if (c != prev)
            {
                if (itemIndex != 0)
                {
                    yield return new string(item, 0, itemIndex);
                    Array.Clear(item, 0, itemIndex);
                    itemIndex = 0;
                }
                
                prev = c;
            }
            
            item[itemIndex] = c;
            itemIndex++;
        }
        
        if (itemIndex != 0)
        {
            yield return new string(item, 0, itemIndex);
        }
    }
}

{
    "DDDD",
    "-",
    "AAAA",
    "-",
    "D",
    "A",
    "-",
    "A",
    "D"
}

public static class Patterns
{
    ...
    
    public static Regex PatternToRegularExpression(this string pattern)
    {
        var parts = new List<string>();
        foreach (string part in pattern.GroupPattern())
        {
            switch (part[0])
            {
                case 'D':
                case 'd':
                {
                    parts.Add("\\d{" + part.Length + "}");
                    break;
                }
                case 'A':
                case 'a':
                {
                    parts.Add("[A-Z]{" + part.Length + "}");
                    break;
                }
                default:
                {
                    parts.Add(Regex.Escape(part));
                    break;
                }
            }
        }
        
        string regexPattern = string.Concat(parts);
        return new Regex(regexPattern, RegexOptions.IgnoreCase);
    }
}

\d{4}-[a-z]{4}-\d{1}[a-z]{1}-[a-z]{1}\d{1}

List<string> patternList = new List<string>();
foreach(char ch in pattern)
{
    if (patternList.Count == 0 || !patternList.Last().Contains(ch))
    {
        patternList.Add(ch.ToString());
    }
    else
    {
        patternList[patternList.Count-1] += ch.ToString();
    }
}

John Simmons / outlaw programmer wrote:

patternList.Last()

John Simmons / outlaw programmer wrote:

patternList[patternList.Count-1] += ch.ToString();

Richard Deeming wrote:

Hey, I thought you were avoiding LINQ!

Richard Deeming wrote:

String concatenation in a loop - because that never affects the performance of your code at all.

patternList[patternList.Count-1] = string.Format("{0}{1}", patternList[patternList.Count-1], ch);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace TestSubjectMatterReco
{
    class Program
    {
        static void Main(string[] args)
        {
            bool run = true;
            while (run)
            {
                Console.WriteLine("Add string to use");
                string subject = Console.ReadLine();
                Console.WriteLine("Add Pattern Line to use");
                string Pattern = Console.ReadLine();
                var sout = Parse(subject, Pattern);

                if (sout.Count() == 0)
                    Console.WriteLine("Unable to detect pattern");
                else
                {
                    int i = 1;
                    sout.ForEach(p => {  Console.WriteLine($"found pattern {p} this is pattern nr {i} of {sout.Count()}"); i++; });
                }                                                                            
                Console.WriteLine("----------------------------------");
                Console.WriteLine();
                Console.WriteLine("Press enter to try again , use q to qwuit");
                var answer = Console.ReadLine();
                if (answer=="q")
                    run = false;
            }            
            
        }        
        static List<string> Parse(string subject, string pattern)
        {
            var subjectList = subject.Split(' ').ToList().Where(p => p.Length == pattern.Length).ToList();
            string result = "";
            //so we have a substring with a lenght that mattches our pattern lenght. 
            if (subjectList.Count() > 0)
            {
                #region break down pattern
                List<string> _patterns = new List<string>();                
                string patt = string.Empty;
                int currindex = 0;          
                foreach (char c in pattern.ToCharArray())
                {                 
                    currindex++;   
                    if (patt == string.Empty)                    
                        patt = c.ToString();                                         
                    else
                    {
                        if (patt.StartsWith(c.ToString()))                        
                            patt += c.ToString();                                                    
                        else
                        {
                            _patterns.Add(patt);
                            patt = c.ToString();                            
                        }
                    }
                    if(currindex == pattern.Length)
                        _patterns.Add(patt);
                }
                int indexinSubjct = 0;
                #endregion
                #region try to find text that fits the pattern
                foreach (string pair in _patterns)
                {
                    //start at the beging.                                         
                    for (int j = subjectList.Count; j > 0; j--)
                    {
                        if (pair.StartsWith("D"))
                        {
                            if (!ParseDigit(subjectList[j-1].Substring(indexinSubjct, pair.Length)))
                                subjectList.Remove(subjectList[j-1]);
                        }
                        else if (pair.StartsWith("A"))
                        {
                            if (!ParseLetter(subjectList[j-1].Substring(indexinSubjct, pair.Length)))
                                subjectList.Remove(subjectList[j-1]);
                        }
                        else
                        {
                            string part = subjectList[j - 1].Substring(indexinSubjct, pair.Length);
                            if(part != pair)
                                subjectList.Remove(subjectList[j - 1]);
                        }
                        //seperator
                    }
                    indexinSubjct += pair.Length;
                }
                return subjectList;                
            }
            return new List<string>();
            #endregion  
        }        
        static bool ParseLetter(string sequence)
        {
           return sequence.All(p => char.IsLetter(p));
        }
        static bool ParseDigit(string sequence)
        {
            return sequence.All(p => char.IsDigit(p));
        }
        
    }
}

var pattern = "DDDD-AA-DD";

while ( pattern.Length > 0 ) {
   char ch1 = pattern[ 0 ];
   string item = string.Join( "", pattern.TakeWhile( p => p == ch1 ) );
   pattern = pattern.TrimStart( ch1 );
   Console.WriteLine( item );
}