Find all substring in a string in C#

In this article we will see c# programming to find all substring in a given string.

below is the programme

private static void FindAllSubstring() {   Console.Write("Enter a String : ");   string inputString = Console.ReadLine();    Console.WriteLine("All substrings for given string are : ");   for (int length = 1; length < inputString.Length; length++) {  Dictionary<int, string> compare = new Dictionary<int, string>();   int k = 0;  for (int index = 0; index <= inputString.Length - length; index++) {    string subString = inputString.Substring(index, length);     if (!compare.ContainsValue(subString))  {     compare.Add(k, subString);     k++;     Console.WriteLine(subString);  }   }  }  }

In this programme , we are using disctionary , and the resason for that is , if a string contain same character more than once , it will print one time only , we are comparing if substring already exist then dont print that.

below is the output

Using LINQ to Find All and Unique Substrings of a Given String in C#:

private static void FindAllSubstring()         {             Console.Write("Enter a String : ");             string inputString = Console.ReadLine();     var Substrings =           from i in Enumerable.Range(0, inputString.Length)           from j in Enumerable.Range(0, inputString.Length - i + 1)            where j >= 1            select inputString.Substring(i, j);                    Console.WriteLine();        Console.WriteLine("All substrings for given string are : ");         foreach (string substring in Substrings)          {             Console.WriteLine(substring);          }             Console.WriteLine();             Console.WriteLine(); Console.WriteLine("All Unique substrings for given string are : ");             foreach (string substring in Substrings.Distinct())             {                 Console.WriteLine(substring);             }         }

In above programme to get the unique substring we are using distinct keyword.

Find below output

Author : Dotnet Office | https://www.youtube.com/TheDotNetOffice

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