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Write new line to text file in C#

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  2 years ago

  by AnLy

  An Ly

  , China

  Joined 2 years ago

  Good day to all,

  I am very much new to programming and C#. I have a problem in writing a new line to a text file. I am using a streamwriter to create a new text file and write data to it. everytime, I add a newline to textfile, it should be like below:

           John;1234;somedata;somedata
           Lily;2213;somedata;somedata
  

  however, my code wont do the above, the output in the text is John;1234;somedata;somedataLily;2213;somedata;somedata   which is not what i want. Please show me the correct way to fix this problem. I will be very appreciated.

   

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  2 years ago

  by Mulish Mehdi

  Tehran, Iran

  Joined 5 years ago
  hi there,
  
  

  sWriter.Write(" John;1234;somedata;somedata\r\nLily;2213;somedata;somedata");

  
  
  
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  2 years ago

  by jefftullin

  Jeff Tullin

  , United Kingdom

  Joined 2 years ago

  I think what you are looking for is writeline, instead of write.

  That automatically puts an end-of-line sequence at the end of each line you output.

  sWriter.WriteLine(" John;1234;somedata;somedata")

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  2 years ago

  by AnLy

  An Ly

  , China

  Joined 2 years ago

  Thanks for your reply jefftullin,

  but i tried that code in my app and it didn't work. my code is something like below:

  streamwriter sw = new streamwriter("file.txt:, true, Encoding.UTF8);

  sw.writeline( "input from text box");

   I take the input from several textbox, and write it to text box in one line seperated by a ";"

  does it have to do with buffer, or do i have to creat a loop somehow?

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  2 years ago

  by jefftullin

  Jeff Tullin

  , United Kingdom

  Joined 2 years ago

  Your original post suggested that you wanted the output to look like:

  John;1234;somedata;somedata
  Lily;2213;somedata;somedata

  To do that, use

  WriteLine("John;1234;somedata;somedata")
  WriteLine("Lily;2213;somedata;somedata")

  If what you actually wanted is

  John

  1234

  somedata

  somedata

  Then Writeline will still help, but you need to do a bit more work.

  First, why add up all the textboxes if you want to write them to the file piece by piece?

  eg what wrong with

  WriteLine(text1.text)

  WriteLine(text2.text)  etc?

   

  If you must start with "John;1234;somedata;somedata"

  then perhaps you could look into using the Replace()  function to swap all the semicolons for \r\n  end of line sequences.

  
  
   

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  2 years ago

  by rajambal_j

  rajambal_j

  , India

  Joined 2 years ago

  Another possibility is to use the Environment.NewLine statement.

  Here is an example:

  Console.WriteLine(string.Format("Line1{0}Line2{0}", Environment.NewLine);

  Geert Verhoeven
  Consultant @ Ausy Belgium

  My Personal Blog

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  2 years ago

  by AnLy

  An Ly

  , China

  Joined 2 years ago

  thanks you for taking your time reply to my post. I got this working last nite already. What my program does is, take input from several text box and write it to a single line. every time a button add is clicked, a new line will be added. i did use the writeline method and this time it's worked. My only problem now is how to search for data in a line by using one of its text field.

  for example: here is the data in text file

  John;1234;Sydney;Aus
  Timy;3214;Melbourne;Aus
  Lana;8471;Darwin;Aus

  now i want to bring up all of timy's data by searching for "timy". I know I have to use some kind of loop for this function, but i not so sure how to? any suggestion will be a great help for me. Tah!

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  2 years ago

  by rajambal_j

  rajambal_j

  , India

  Joined 2 years ago

  Hi,

   I don't know the entire context but if you want to save objects and reload them afterwards, it might be easier to use Binary Serialization.

  Here is an example: http://www.codeguru.com/columns/DotNet/article.php/c6595/.

  If that doesn't help you, you can aswell use the StreamReader. The class contains a method named ReadLine(). Within the returned string from ReadLine() you then use string functions to check for a given name. This means that you need to read until you find the correct line.

   Greetz,

   Geert

   

  Geert Verhoeven
  Consultant @ Ausy Belgium

  My Personal Blog

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  2 years ago

  by AnLy

  An Ly

  , China

  Joined 2 years ago

  Hi Geert,

  That's a very useful link. I will look into it.

  For now i will use streamreader to obtain the data since i am very new to C#. just a question, how do I read till find the correct line, does it mean that i have to create a loop somehow?

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