Find control characters in text file

Asked 10 years, 3 months ago. Active 10 years, 3 months ago. Viewed 32k times. Improve this question. Add a comment. Active Oldest Votes. Improve this answer.

I dont know how many such characters are out there in the file. I want to search for those characters. There are many, many invisible characters that are not shown by whitespace-mode. Amongst them: zero-width space, zero-width non-joiner, zero-width joiner, byte-order mark See how fingerprinting uses them, and the dangers of neglecting them.

You might want to reflect that into your answer. Thanks for the answer. I wanted to understand what the regular expression does. This is the way you can use it. Check the below example. I have covered most of the methods to find and remove m character. Add a comment. Active Oldest Votes. Try following code using System; using System. Generic; using System. Linq; using System. Text; using System. Flush ; writer. Close ; reader.

Improve this answer. Substring startPos, line. Surprisingly it only takes about 4 seconds to read a MB file and report back on the number of xml messages it contains. In this case over k of them. This command instructs printer to go to head of following page. This collection of control characters covers numerous applications. C1 control characters — C1 covers hex F. C1 is essentially for displays and printers. C1 set was introduced in late s. It is fundamentally intended for controlling monitors and printer gadgets, despite fact that portion of controls delegates different uses also.

C1 set is meant for use with C0 set. Two of them have control character like attributes, despite fact that they are not really termed control characters in ISO Here are some of basic Control Codes :.