How to write data to a text file without overwriting the current data

Question

I can t seem to figure out how to write data to a file without overwriting it  I know I can use File appendtext but I am not sure how to plug that into my syntax  Here is my code   TextWriter tsw   new StreamWriter   C  Hello txt       Writing text to the file  tsw WriteLine  Hello       Close the file  tsw Close      I want it to write Hello every time I run the program  not overwrite the previous text file  Thanks for reading this

User · Answer

Look into the File class   You can create a streamwriter with  StreamWriter sw   File Create          You can open an existing file with   File Open        You can append text easily with  File AppendAllText

User · Answer

First of all check if the filename already exists  If yes then create a file and close it at the same time then append your text using AppendAllText  For more info check the code below     string FILE NAME    Log    System DateTime Now Ticks ToString            txt    string str Path   HostingEnvironment ApplicationPhysicalPath     Log           FILE NAME     if   File Exists str Path           File Create str Path  Close        File AppendAllText str Path  jsonStream   Environment NewLine        else if  File Exists str Path            File AppendAllText str Path  jsonStream   Environment NewLine

User · Answer

Pass true as the append parameter of the constructor   TextWriter tsw   new StreamWriter   C  Hello txt   true

User · Answer

Change your constructor to pass true as the second argument   TextWriter tsw   new StreamWriter   C  Hello txt   true

User · Answer

Best thing is   File AppendAllText  c   file txt   Your Text

User · Answer

Here s a chunk of code that will write values to a log file  If the file doesn t exist  it creates it  otherwise it just appends to the existing file  You need to add  using System IO   at the top of your code  if it s not already there   string strLogText    Some details you want to log        Create a writer and open the file  StreamWriter log   if   File Exists  logfile txt        log   new StreamWriter  logfile txt      else     log   File AppendText  logfile txt          Write to the file  log WriteLine DateTime Now   log WriteLine strLogText   log WriteLine        Close the stream  log Close

User · Answer

using  StreamWriter writer   File AppendText LoggingPath         writer WriteLine  Text

User · Answer

You have to open as new StreamWriter filename  true  so that it appends to the file instead of overwriting

[c#] How to write data to a text file without overwriting the current data

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