Extract characters from a substring

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string name = "S130A-1E734138G04_Trend";
char[] delimiters = new char[] {'-','_'};
            string[] parts = name.Split(delimiters, StringSplitOptions.RemoveEmptyEntries);
            Console.WriteLine("Lot Number")
                for (int i = 0; i < parts.Length; i++)
                {
                    Console.WriteLine(parts[i]);
                }

Hi! I want to write a code to extract out the characters "1E734138G04", which is after the "-" and before "_".

I have written these codes and I'm not sure how to extract out the characters that i want.

Thanks for any help!

What I have tried:

Wrote the codes above and some googling but I'm not sure which is the best method

Posted 4-Apr-18 21:40pm

Member 13650651

Updated 4-Apr-18 22:03pm

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3 solutions

Solution 3

Quote:
Hi! I want to write a code to extract out the characters "1E734138G04", which is after the "-" and before "_".
I have written these codes and I'm not sure how to extract out the characters that i want.

Isn't it what your code is doing ?
Your code gives you correct answer or not ?
How can you be unsure when you see the result on screen ?

Quote:
Wrote the codes above and some googling but I'm not sure which is the best method

For such an input, the difference between methods will be so tiny that you will not see a difference if you don't use it millions of time.

Posted 4-Apr-18 22:05pm

Patrice T

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Maciej Los · Accepted Answer · 2018-04-04T21:51:00

Your part is in a middle:

C#

string result0 = parts[1];
Console.WriteLine(result0);

[EDIT]
Another ways:

C#

//linq methods: SkipWhile + TakeWhile
string result1 = string.Join("", name.SkipWhile(x=>x!=delimiters[0]).Skip(1).TakeWhile(x=>x!=delimiters[1]));
Console.WriteLine(result1);
//String.Substring
string result2 = name.Substring(name.IndexOf(delimiters[0])+1, name.IndexOf(delimiters[1]) - name.IndexOf(delimiters[0]) -1);
Console.WriteLine(result2);

For further details, please see:
Enumerable.SkipWhile Method (System.Linq)[^]
Enumerable.TakeWhile Method (System.Linq)[^]
String.Join Method (String, String[]) (System)[^]
String.Substring Method (Int32, Int32) (System)[^]

CPallini · Accepted Answer · 2018-04-04T21:56:00

Solution 2

Use regular expressions.
Try, for instance

C#

static void Main()
{
  string name = "S130A-1E734138G04_Trend";
  Regex regex = new Regex(@"-(\w+)_");
  Match match = regex.Match(name);
  if (match.Success)
  {
    if (match.Success)
    {
      string key = match.Groups[1].Value;
      Console.WriteLine(key);
    }
  }
}

Posted 4-Apr-18 21:56pm

CPallini

Comments

Maciej Los 5-Apr-18 3:57am

5ed!

CPallini 6-Apr-18 4:28am

Thank you, man!

Member 13650651 6-Apr-18 4:15am

Thank you CPallini! Worked perfectly. Appreciate your help!