We help IT Professionals succeed at work.

C# using "num = input.Substring(indexOne + 6, 53);" to get the rest of the string?

Karl66 asked
Last Modified: 2010-04-15
I am the following code to find a keyword in a text file. When I find it I want to capture the rest of the line. But some lines are 53 and some are 56 and maybe longer. If I put in 56 it errors out on lines that are only 53. Any thoughts?


            if (File.Exists(path + @"\tmp\ssm.txt"))

                int indexOne = -1;  // ondex of ser #
                int indexTwo = -1;  // index of a space after a number
                string num = "";

                // Read file to list
                StreamReader sr = File.OpenText(path + @"\tmp\ssm.txt");
                string input = null;
                while ((input = sr.ReadLine()) != null)
                    indexOne = input.IndexOf("Host  UDO");
                    if (indexOne > -1)
                        num = input.Substring(indexOne + 6, 53);
                        break; // exit loop

                lblLibrary.Text = num; // not really a num
                return path;
                // sr.Close();
Watch Question

Unlock this solution and get a sample of our free trial.
(No credit card required)
Most Valuable Expert 2012
Top Expert 2008
Unlock this solution and get a sample of our free trial.
(No credit card required)

Ah a very subtle way to point out my error Bob :)

num = input.Substring(indexOne + 6, input.Length);

you are right of course :)


Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Thanks for using Experts Exchange.

Please provide your email to receive a sample view!

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.


Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.