Extract Values from a string

Question

User-1499457942 posted

Hi

 I have a string like this C01_P_Usr_abc.xls . I want to extract string between second _ and third _ . In this case it should give Usr.

Thanks

Answer 1

User1120430333 posted

https://www.dotnetperls.com/substring

Answer 2

User36583972 posted

Hi JagjitSingh,

 I have a string like this C01_P_Usr_abc.xls . I want to extract string between second _ and third _ . In this case it should give Usr.

You can try the following methods.

1: Use Split and get the values.

            string tet = "C01_P_Usr_abc.xls";

            string[] myAgent = tet.Split(new string[] { "_" }, StringSplitOptions.None);
            for (int i =0; i <myAgent.Length; i++)
            {
                Console.WriteLine(myAgent[i].ToString());
            }

2: Substring

  string tet = "C01_P_Usr_abc.xls";

            //int getfirstindex = 3;//abc
            int getfirstindex = 2;//User
            //int getfirstindex = 1;//P

            string result = "";
            for(int i =0; i <= getfirstindex; i ++)
            {               
                if(i == getfirstindex)
                {
                    if(result=="")
                    {
                        result = tet.Substring(0, tet.IndexOf('_'));
                    }
                    else
                    {
                        try
                        {
                            result = result.Substring(0, result.IndexOf('_'));
                        }
                        catch
                        {
                            result = result.Substring(0, result.IndexOf('.'));
                        }
                    }
                    
                }
                else
                {
                    if (result == "")
                    {
                        result = tet.Substring(tet.IndexOf('_') + 1);
                    }
                    else
                    {
                        try
                        {
                            result = result.Substring(result.IndexOf('_') + 1);
                        }
                        catch
                        {
                            result = result.Substring(0, result.IndexOf('.'));
                        }
                    }
                       
                }
            }

Best Regards,

Yong Lu

Answer 3

User1341756031 posted

Try...C# substring method

Answer 4

User738333362 posted

// Main Method 
    public static void Main() 
    { 
  
        // define string 
        String str = "GeeksForGeeks"; 
  
        Console.WriteLine("String    : " + str); 
  
        // retrieve the substring from index 5 
        Console.WriteLine("Sub String1: " + str.Substring(5)); 
  
        // retrieve the substring from index 8 
        Console.WriteLine("Sub String2: " + str.Substring(8)); 
    }