Start Reading at the Beginning of a File Again in C

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Reading the file from start again!

• Question

• Hello everyone!
  Hither is the situation: Im developing a program which reads bunch of files. Ane of them has a special criteria lets say information technology has "hello" in i of it's lines.

  I take one arraylist ( call information technology file_names), with a loop im going through each chemical element of information technology. If it sees a file with "how-do-you-do"in it , I put the name of the file in a cord and a flag which indicates we accept a file like that.

  Now if I read the file afterwards that loop it starts once more from a line after the "hi".
  Here is the lawmaking:

  for ( int j = 0; j < file_names.Count; j++)
  {

                                  Organisation.IO.StreamReader file = new System.IO.StreamReader(Convert.ToString(file_names[j]));
                  while ((line = file.ReadLine()) != nada)
                  {

                      Regex cheque = new Regex("(hi)");
                      bool check_check = bank check.IsMatch(line);
                       if (check_check)
                      {
                          hi_flag = one;
                          file_name= Convert.ToString(file_names[j]);

                                               }
                      continue;
                  }

  }

                      if (hi_flag == 1)
                      {
                              //!!!Problem!!!////
                              //If i read the file with "hi" in it, information technology starts from the line after "hullo"
                              //How i tin read the file from outset of it?

                      }

  Thanks

  • Edited by Monday, June 30, 2008 ix:15 PM grammer

Answers

•  Really, on further reading information technology looks like you'll want to call Seek on the base of operations stream along with DiscardBufferedData.

  i.e.

  if  (hi_flag == 1)

  {

  file.BaseStream.Seek(0, SeekOrigin.Begin);// sets the pointer back to the commencement

  file.DiscardBufferedData();// clears out any cached data from the previous reads so that it tin commencement reading from the get-go again

  }

  • Edited past c_jensen Tuesday, July 1, 2008 4:24 PM Formatted code
  • Marked as reply by jack 321 Friday, July 4, 2008 2:36 AM

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Source: https://social.msdn.microsoft.com/Forums/vstudio/en-US/b691dc9f-a709-44aa-882c-d734fb0dd763/reading-the-file-from-start-again?forum=csharpgeneral

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